Class / Patent application number | Description | Number of patent applications / Date published |
331117000 |
L-C type
| 208 |
331116000 |
Electromechanical resonator controlled
| 77 |
331111000 |
Relaxation oscillator
| 39 |
331109000 |
Amplitude stabilization and control
| 34 |
331108000 |
Integrated circuit oscillators
| 18 |
331115000 |
Negative resistance
| 17 |
331108000 |
Use of complimentary-type transistors
| 10 |
331108000 |
Phase shift oscillator | 4 |
20080204155 | OSCILLATOR DEVICES AND METHODS THEREOF - Oscillator devices and methods of operating such oscillator devices are disclosed. The oscillator devices include a current source, and an oscillation module to provide a clock signal. The frequency of the clock signal depends on the relationship between a threshold voltage of a transistor at the oscillation module and the current level provided by the current source. The transistor at the oscillation module is matched to a transistor at the current source so that the frequency of the clock signal is relatively insensitive to changes in device temperature. | 08-28-2008 |
20080204156 | Measuring threshold voltage of transistors in a circuit - In one embodiment, the present invention includes an oscillator to generate a first frequency and a second frequency. The oscillator includes a plurality of stage cells, each stage cell including a first transistor of a first polarity and a second transistor of a second polarity, each coupled between a first voltage node and a first intermediate node and an inverter coupled to the first intermediate node. In operation, a difference between the first frequency and the second frequency is proportional to a threshold voltage of the second transistor. Other embodiments are described and claimed. | 08-28-2008 |
20080231383 | Origami Cascaded Topology For Analog and Mixed-Signal Applications - The present disclosure relates to coupled circuits and methods of coupling circuits having a power supply wherein a plurality of transistors are inductively coupled directly to the power supply for providing a single DC supply voltage directly to each of the plurality of transistors, and wherein a plurality of transformers have primary and secondary windings, the primary and secondary windings providing, at least in part, inductive loads for inductively coupling the plurality of transistors to the power supply, the plurality of transformers also providing an AC signal path for coupling neighboring ones of the plurality of transistors together. | 09-25-2008 |
20080252389 | SINE WAVE OSCILLATOR HAVING A SELF-STARTUP CIRCUIT - Disclosed herein is a sine wave oscillator. The sine wave oscillator includes an operational amplification unit, a first resistor, a first capacitor, a second capacitor, a second resistor, a third resistor, a fourth resistor, and a startup circuit. The first ends of the first resistor and the first capacitor are connected to the plus input terminal of the operational amplification unit. The first end of the second capacitor is connected to the plus input terminal. The first end of the second resistor is connected to the second end of the second capacitor and its second end is connected to the output terminal of the operational amplification unit. The first end of the third resistor is connected to the minus input terminal of the operational amplification unit. The fourth resistor is connected between the minus input terminal and the output terminal. The first end of the startup circuit is connected to the minus input terminal. | 10-16-2008 |
20080258826 | Low Voltage Operational Transconductance Amplifier Circuits - Circuits (FIG. | 10-23-2008 |
20080309422 | Oscillator - An oscillator according to the present invention includes: an active element that oscillates at a predetermined frequency to output a signal of the predetermined frequency; and an impedance element having an impedance that is lower at a frequency lower than the predetermined frequency than at the predetermined frequency, the active element having signal terminals at least one of which is grounded through a series circuit composed of the impedance element and a capacitor. | 12-18-2008 |
20090072917 | OSCILLATION CIRCUIT AND OSCILLATOR - An oscillation circuit includes a cross-coupled circuit having a first active element and a second active element which are differentially connected to each other. The oscillation circuit oscillates in a resonance frequency of a resonator connected between the first active element and the second active element. | 03-19-2009 |
20100001803 | ELECTRONIC CIRCUIT FOR OBTAINING A VARIABLE CAPACITATIVE IMPEDENCE - The invention is characterized in that it comprises a plurality of impedances (R | 01-07-2010 |
20100123523 | STANDING WAVE OSCILLATORS - A standing wave oscillator (SWO) is formed from a microstrip transmission line or a stripline transmission line having a closed-loop single signal trace. Using the microstrip transmission line or stripline transmission line, the SWO can be formed with bends and in complex shapes, which are not so easily realized or possible using coplanar stripline (CPS) transmission lines. Simulation results demonstrate that the microstrip and stripline transmission line based SWOs provide superior operational characteristics (e.g., higher quality factors (Qs)) compared to a CPS transmission line based SWO of similar size and geometry. | 05-20-2010 |
20100231311 | System And Method For Implementing An Oscillator - In one embodiment, a system for generating an oscillating signal includes a transconductance amplifier comprising a single-ended output and a differential input. The system also includes only one feedback loop coupled to the transconductance amplifier. The feedback loop includes a low pass filter configured to receive the output of the transconductance amplifier. Also, the feedback loop includes a high pass filter configured to receive the output of the first low pass filter and output a signal to only one terminal of the differential input of the transconductance amplifier. | 09-16-2010 |
20100237956 | BIAS GENERATION CIRCUIT AND VOLTAGE CONTROLLED OSCILLATOR - This invention includes a bias origination section configured to originate an original bias voltage; a comparison section configured to compare the original bias voltage and a comparison voltage, and output a comparison result; a resistive divider section composed by a resistance circuit including a variable resistor section having a resistor and a switch, and configured to generate the comparison voltage; a bias decision control section configured to determine bias decision data for controlling a resistance value of the variable resistor section so as to bring the comparison voltage close to the original bias voltage, based on a comparison result of the comparison section; and a storage section configured to hold the bias decision data and also output the comparison voltage as a bias voltage by controlling a resistance value of the variable resistor section based on the held bias decision data, thereby generating a low-noise bias with a small area. | 09-23-2010 |
20100271143 | Current-Controlled Hysteretic Oscillator - The disclosed current-controlled hysteretic oscillator operates by controlled currents opposing each other in differential pairs to set a controlled hysteresis for improved relaxation oscillations with immunity to phase or frequency error. | 10-28-2010 |
20100277248 | Systems and methods for generating pulsed output signals using a gated RF oscillator circuit - Systems and methods for generating pulsed output signals that employ a gated RF oscillator circuit having an output that is switchably grounded through the emitter of a transistor and including feedback from the output of the circuit to the base of the transistor to create oscillations and to allow a digital input pulse of a desired length to control the start and stop of oscillations created by the transistor. | 11-04-2010 |
20100289591 | SYSTEM AND METHOD FOR EFFICIENTLY GENERATING AN OSCILLATING SIGNAL - An apparatus for generating an oscillating signal including an oscillator configured to generate the oscillating signal, a controller configured to generate a control signal that controls a characteristic (e.g., amplitude or frequency) of the oscillating signal, and a power supply configured to supply power to the oscillator as a function of the control signal. The power supply may be configured to supply power to the oscillator as a function of the amplitude or frequency of the oscillating signal to improve power efficiency. | 11-18-2010 |
20100327985 | Oscillator Circuit and Method for Generating a Clock Signal - An oscillator circuit comprises a charging block ( | 12-30-2010 |
20110001570 | Oscillation Circuit - An oscillation circuit includes a piezoelectric oscillator, a resistive element, and an exciting circuit connected between an input node and an output node in parallel with one another, a first capacitor connected between the input node and a ground node, and a second capacitor connected between the output node and the ground node. The exciting circuit includes a NAND circuit and first and second inverters that are cascade-connected. Oscillation of the piezoelectric oscillator is started when an enable signal input to the NAND circuit is switched to an H level. | 01-06-2011 |
20110006852 | PLL CIRCUIT AND SEMICONDUCTOR DEVICE HAVING THE SAME - A PLL circuit includes a phase detector, a loop filter (LF), a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares a phase of a signal Fs which is input from outside with a phase of a signal Fo/N which is input from the frequency divider. The loop filter generates a signal Vin by removing alternating current components from a signal input from the phase detector. The voltage-controlled oscillator outputs a signal Fo based on the signal Vin input from the loop filter. The frequency divider converts the signal Fo output from the voltage-controlled oscillator into Fo/N (frequency division by N), and outputs it to the phase detector. | 01-13-2011 |
20110018642 | Differential varactor circuit for a voltage controlled oscillator - According to one exemplary embodiment, a differential varactor circuit for a voltage controlled oscillator having two differential outputs includes a first varactor having first and second terminals and a second varactor having first and second terminals. In the differential varactor circuit, each of the first and second terminals of the first varactor and each of the first and second terminals of the second varactor are coupled to one of the two differential outputs of the voltage controlled oscillator, thereby allowing a size of each of the first and second varactors to be reduced so as to increase varactor quality factor. Each of the first and second terminals of the first varactor can be coupled to one of the two differential outputs by a capacitor, and each of the first and second terminals of the second varactor can be coupled to one of the two differential outputs by a capacitor. | 01-27-2011 |
20110018643 | VOLTAGE CONTROLLED OSCILLATOR WITH MICROSTRIP LINE SUITABLE FOR COARSE ADJUSTMENT OF OSCILLATION FREQUENCY BAND - A voltage controlled oscillator with a microstrip line suitable for coarse adjustment of an oscillation frequency band, the voltage controlled oscillator includes a transistor for oscillation that outputs an oscillation signal; a microstrip line formed on a substrate together with the transistor for oscillation, having one end connected to the transistor for oscillation and the other end connected to a ground electrode formed on the substrate, and thus constituting a part of a frequency determining element that determines a frequency of the oscillation signal according to a line length from the one end of the microstrip line to the ground electrode; and a conductor for coarse adjustment that connects between the one end and the other end of the microstrip line to the ground electrode, thereby reducing the line length of the microstrip line in the connection state. | 01-27-2011 |
20110018644 | OSCILLATOR - Provided is a transformer-based oscillator which is suited to oscillate frequencies in multiple bands. An oscillator includes a transformer resonance unit and a plurality of complementary transistors. The transformer resonance unit includes a primary coil and a secondary coil corresponding to the primary coil. The plurality of complementary transistors have gates and drains between which both ends of the transformer resonance unit are respectively connected. Thus, the oscillator may operate in a differential mode or common mode according to the phase of the transformer resonance unit. Also, a complementary transistor constituting a multiband oscillation loop may be independently connected to both ends of the transformer resonance unit, and an oscillation loop of at least one band may be selected out of a multiband oscillation loop using a switch unit. Thus, the oscillator may be suited to oscillate resonance frequencies in multiple bands. | 01-27-2011 |
20110095832 | Fast start, low power oscillator system - A fast start, low power oscillator system includes an oscillator circuit including an amplifier and a tank circuit, the amplifier including an operating resistance which sets the amplifier operating current and a speed-up circuit including a switching circuit for temporarily increasing the operating current to an elevated level at start-up and then returning it to the original operating current when the oscillator reaches its operating amplitude. | 04-28-2011 |
20110133845 | OSCILLATOR CIRCUIT - The present invention provides an oscillator circuit that can decrease consumed current. Namely, a second PMOS transistor is provided between a first PMOS transistor in which a constant current flows and an NMOS transistor for amplifying an oscillating signal, in order to interrupt the constant current flowing in the first PMOS transistor MP | 06-09-2011 |
20110175685 | MULTI-PRIMARY DISTRIBUTED ACTIVE TRANSFORMER AMPLIFIER POWER SUPPLY AND CONTROL - An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding. | 07-21-2011 |
20110193641 | LOW NOISE OSCILLATORS - An oscillator having: (A) a transistor for producing an oscillating output signal at an output electrode of the transistor. The oscillator includes; (B) a bias circuit for producing a bias signal for the transistor, said bias circuit including an amplifier coupled to the output electrode of the transistor; and (C) a circuit coupled between an output of the amplifier and a control electrode of the transistor, for isolating the bias signal provided by the amplifier from the oscillating signal. | 08-11-2011 |
20110267147 | OSCILLATOR CIRCUIT - An oscillator circuit comprises a push-push oscillator and a differential output, comprising a first and a second output circuit. The push-push oscillator has a first and a second branch. Each of the first and second branch comprises an own voltage divider branch of a common bridge circuit. Each of the first and second voltage divider branches comprises an own pair of micro-strip lines connected in series. Each of the first and second voltage divider branches has an own tap. Both taps are connected to each other by at least one of a first capacity and a micro-strip line. The differential output comprises a first and a second output terminal. The first output terminal is connected via the first output circuit to a first node. The second output terminal is connected via the second output circuit to a second node. Each of the first and second nodes of the push-push oscillator is a common node of both of the first and the second branches. | 11-03-2011 |
20110298550 | Ultra low power oscillator - A frequency generator is provided which is embodied in an integrated circuit manufactured at a process node below 100 nm. The frequency generator comprises a current starved oscillator configured to generate an output frequency signal in dependence on a voltage of a bias signal and a self-biased current generator configured to generate the bias signal, wherein the self-biased current generator comprises a first transistor and a second transistor connected in series. The bias signal is taken from a midpoint between the first transistor and the second transistor, and respective gates of the first and second transistors are connected to keep said first and second transistors in a cut-off state. Accordingly the self-biased current generator operates in a deep sub-threshold state and a current of said bias signal is dependent on a leakage current in the first and second transistors. | 12-08-2011 |
20120019330 | MULTI-SCREW CHAOTIC OSCILLATOR CIRCUIT - There is provided a multi-screw chaotic oscillator circuit with simple configuration, that can use various multi-hysteresis VCCS characteristics and generate a variety of multi-screw attractors. The multi-screw chaotic oscillator circuit comprises: a linear two-port VCCS circuit | 01-26-2012 |
20120038428 | Oscillators and method of operating the same - Oscillators and a method of operating the same are provided, the oscillators include at least one oscillation device including a first magnetic layer having a magnetization direction that is variable, a second magnetic layer having a pinned magnetization direction, and a non-magnetic layer disposed between the first magnetic layer and the second magnetic layer. The oscillation device is configured to generate a signal having a set frequency. The oscillators further include a driving transistor having a drain connected to the at least one oscillation device, and a gate to which a control signal for controlling driving of the oscillation device is applied. | 02-16-2012 |
20120223782 | COMPLEX NEGATIVE FEEDBACK FREQUENCY SELECTION OUTPUT CIRCUIT AND OSCILLATION CIRCUIT USING THE SAME - It is an object to provide a complex negative feedback frequency selection output circuit that can produce an output signal of a high resonance sharpness Q factor and an oscillation circuit using the same. The complex negative feedback frequency selection output circuit according to the present invention, frequency-selectively relays only the residual components of one of a signal in phase with (or a signal opposite in phase to) a feedback processed signal obtained by negative feeding back a feedback signal to an input frequency signal, with a rejected frequency band being left out, while relaying at least a real number component of the other, and comprises a feedback path which relays a difference signal between (or a sum signal of) the selectively relayed output and the relayed output of the real number component, as the feedback signal. The gain of a loop including this feedback path is variable and can be set manually or automatically. | 09-06-2012 |
20120286887 | PHASE LOCKED LOOP CIRCUIT HAVING A VOLTAGE CONTROLLED OSCILLATOR WITH IMPROVED BANDWIDTH - A voltage controlled oscillator includes a plurality of serially connected composite gain stages. A composite gain stage includes a transconductance stage and a transimpedance stage. The transconductance stage has first and second current paths from a first power supply voltage terminal to a second power supply voltage terminal. A first variable resistance is coupled between the first and second current paths. The transimpedance stage has a first inverter and a second inverter. The first inverter has an input terminal coupled to the output of the first current path and an output terminal. The second inverter has an input terminal coupled to the output of the second current path, and an output terminal. A second variable resistance is coupled between the input terminal and the output terminal of the first inverter, and a third variable resistance is coupled between the input terminal and the output terminal of the second inverter. | 11-15-2012 |
20120293271 | Voltage tunable oscillator using bilayer graphene and a lead zirconate titanate capacitor - A voltage controlled oscillator comprising a substrate and a bilayer graphene transistor formed on the substrate. The transistor has two signal terminals and a gate terminal positioned in between the signal terminals. A voltage controlled PZT or MEMS capacitor is also formed on the substrate. The capacitor is electrically connected to the transistor gate terminal. At least one component is connected to the transistor and capacitor to form a resonant circuit. | 11-22-2012 |
20120293272 | Methods And Systems For Generating Millimeter-Wave Oscillations - The various embodiments of the present invention provide improved methods and circuits for generating millimeter-wave oscillations. Generating millimeter-wave oscillations may involve providing a semiconductor device comprising at least two terminals and a polar heterojunction formed from two semiconductor materials. A voltage bias may be applied to at least two terminals of the device in which the voltage enhances a two-dimensional electron gas (2DEG) layer at the polar heterojunction and produces a sharply-peaked but spatially-localized electric field within the 2DEG with a large longitudinal component, wherein the longitudinal component of the electric field serves as a nucleation site for a plurality of propagating dipole domains observable as a plurality of self-sustaining millimeter-wave oscillations. | 11-22-2012 |
20120313718 | OSCILLATION CIRCUIT - A disclosed oscillation circuit includes a constant-voltage generation circuit, an oscillation generation circuit configured to generate an oscillation output, an output circuit including a plurality of parallelly arranged MOSFET circuits, to which a constant voltage generated by the constant-voltage generation circuit is supplied as a supply voltage, output points of the plurality of MOSFET circuits being mutually connected, and a drive circuit configured to drive a selected MOSFET circuit selected in response to a selection input among the plurality of MOSFET circuits by the oscillation output, wherein an output from an unselected MOSFET circuit among the plurality of MOSFET circuits other than the selected MOSFET circuits has a high impedance. | 12-13-2012 |
20120326796 | OSCILLATOR CIRCUT AND ELECTRONIC CIRCUIT COMPRISING THE OSCILLATOR CIRCUIT - An oscillator circuit including a first capacitor provided with a first terminal; a resistor provided with a reference terminal; a first current generator provided with a connection terminal; a second current generator provided with a second connection terminal. Further, the circuit includes a switching matrix between the first and second generators and resistor and the at least one first capacitor. | 12-27-2012 |
20130021108 | OSCILLATOR APPARATUS AND METHOD WITH WIDE ADJUSTABLE FREQUENCY RANGE - An oscillator formed from low cost discrete semiconductors and passive devices creates a linear periodic ramp of constant frequency with ramp slope based on an external voltage signal. Parameters are stable over a wide range of temperatures and variations of transistor parameters that normally degrade in extreme environments. The oscillator period can be phase and frequency synchronized to an external clock source over a wide range of frequencies. The oscillator ramp generator phase can be synchronized on a cycle by cycle basis for incorporation in power converters employing spread spectral EMI reduction techniques, multi-converter systems employing clock interleaving for distribution bus filter optimization, and resonant mode converters employing zero voltage switching techniques. Oscillator ramp rate is independent of frequency and can be synchronized to DC (inhibit) for use in ultra low power burst mode power conversion. | 01-24-2013 |
20130043957 | LOW DISTORTION IMPEDANCE SELECTION AND TUNABLE IMPEDANCE CIRCUITS - A tunable impedance circuit can include a fixed impedance and one or more impedance selection circuits. Each impedance selection circuit can include a first impedance connected to a first interface terminal, a second impedance connected to a second interface terminal, and a plurality of series-connected transistors connected between the first and second impedances. Each impedance selection circuit can also include a plurality of drive impedance networks connected to gates, sources, drains, bodies, and isolation regions of the series-connected transistors, and a control circuit to provide a plurality of control signals to the drive impedance networks to turn on and turn off the series-connected transistors. For each impedance selection circuit, turning on and turning off the respective plurality of series-connected transistors can bring the series combination of the respective first and second impedances into and out of electrical communication with, e.g., into and out of parallel with, the fixed impedance. | 02-21-2013 |
20130082788 | LOW NOISE OSCILLATOR HAVING PASSIVE IMPEDANCE NETWORK - Apparatus and methods are disclosed related to an oscillator that includes a sustaining amplifier. One such apparatus includes a resonant circuit configured to operate at a resonant frequency, a sustaining amplifier, and a passive impedance network. The resonant circuit can have a first terminal and a second terminal. The sustaining amplifier can include at least a first switch configured to drive the first terminal of the resonant circuit in response to an input at a first control terminal of the first switch. The passive impedance network can be configured to pass a bias to the first control terminal, such as a gate of a field effect transistor, of the first switch. The passive impedance network can be electrically coupled to the second terminal of the resonant circuit and can include at least one inductor. | 04-04-2013 |
20130106525 | SINGLE-STAGED BALANCED-OUTPUT INDUCTOR-FREE OSCILLATOR AND METHOD THEREOF | 05-02-2013 |
20130113574 | OSCILLATING DEVICE - The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits. | 05-09-2013 |
20130285755 | SYSTEM AND METHOD FOR SUPPORTING DIFFERENT TYPES OF OSCILLATOR CIRCUITS - In accordance with some embodiments of the present disclosure, an oscillator circuit comprises, a first pad associated with a first terminal of an oscillator and a second pad associated with a second terminal of the oscillator. The oscillator is configured to generate an oscillating signal and communicate the oscillating signal from the second terminal to a clock distributor coupled to the second pad. The oscillator circuit further comprises an oscillator gain element comprising an output node coupled to the first pad and an input node coupled to the second pad. The oscillator circuit also comprises a digital-to-analog converter (DAC) coupled to the first pad. The oscillator circuit additionally comprises a switching circuit coupled to the gain element. The switching circuit is configured to enable the gain element when the oscillator comprises a resonator and disable the gain element when the oscillator comprises a voltage controlled oscillating module. | 10-31-2013 |
20140055205 | OSCILLATOR FOR A POWDER SPRAY COATING DEVICE - An oscillator ( | 02-27-2014 |
20140139295 | LOW POWER VOLTAGE CONTROLLED OSCILLATOR - An enhanced negative resistance voltage controlled oscillator (VCO) is provided, in which the body of each transistor within a pair of cross-coupled transistors is coupled to the gate of the same transistor through a resistor. The body transconductance is employed to enhance the negative resistance of the cross-coupled pair of transistors. At the same time, a forward body bias voltage reduces the threshold voltage of the cross-coupled pair to allow the VCO to operate at a low power supply voltage. Further, the resistor connected between the body and the drain of each transistor voids the leakage in the substrate, and thus, reduces power consumption of the VCO further. This VCO provides low power operation with enhanced figure of merit without employing any extra inductors besides the inductors that are part of the LC tank. | 05-22-2014 |
20140203880 | BIAS CURRENT CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - A bias current circuit controls an oscillator that generates an oscillation signal of a frequency corresponding to an input current. The circuit includes a part that detects fluctuation of a control current for variably controlling the frequency of the oscillation signal and a part that generates an input current in which a fluctuation component of the control current is canceled using a current for cancelling the detected fluctuation of the control current. | 07-24-2014 |
20160006393 | OSCILLATOR AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - An oscillator includes a flip-flop that outputs a first signal having a phase that is inverted according to a comparison signal, a comparison circuit that compares an amplification voltage with a first reference voltage and outputs the comparison signal, a current source having an output voltage that is fixed to a second reference voltage, and an amplification circuit that generates the amplification voltage according to a current outputted from the current source and the second reference voltage. | 01-07-2016 |
20160028347 | OSCILLATOR CIRCUIT AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - Controllability of an oscillator circuit is improved. The oscillator circuit has inverters in odd-numbered stages. A circuit is electrically connected to a power supply node of the inverters to which a high power supply potential is input. The circuit includes a first transistor, a second transistor, and a capacitor. The first transistor includes an oxide semiconductor in its channel. A holding circuit including the first transistor and the capacitor has a function of holding an analog potential that is input from the outside. The potential held by the holding circuit is input to a gate of the second transistor. A power supply potential is supplied to the inverters through the second transistor, so that the delay time of the inverter can be controlled by the potential of the gate of the second transistor. | 01-28-2016 |
20160048152 | CURRENT MIRROR WITH DEPLETION MODE MOS AND EMBEDDED NOISE FILTER - A current mirror with depletion mode MOS devices, and an embedded noise filter, operable with low supply voltage to provide a low-noise mirror current. The current mirror includes depletion-mode MOS transistors M | 02-18-2016 |
20160065130 | OSCILLATOR WITH DIFFERENTIAL STRUCTURE - An oscillator with a differential structure which is formed in an integrated circuit, including: a first transistor and a second transistor in each of which a drain electrode, a gate electrode, and a source electrode are sequentially arranged, a drain of the first transistor is connected with a gate of the second transistor through a first wiring, a drain of the second transistor is connected with a gate of the first transistor through a second wiring, and a first end of a source of the first transistor and a first end of a source of the second transistor are connected through a third wiring, and a second end of the source of the first transistor and a second end of the source of the second transistor are connected through a fourth wiring. | 03-03-2016 |
20160065186 | ADJUSTING THE MAGNITUDE OF A CAPACITANCE OF A DIGITALLY CONTROLLED CIRCUIT - An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | 03-03-2016 |
20160105148 | RC OSCILLATOR - A method includes using a current source to provide a charging current to a capacitor of a resistor-capacitor (RC) tank of an RC oscillator. The method includes using a resistor of the current source as a resistor for the RC tank. | 04-14-2016 |
20160126888 | SEMICONDUCTOR DEVICE - An object of the present invention is to provide a semiconductor device including an oscillator circuit including a circuit between inverters. In the circuit, a sum of the length (a | 05-05-2016 |
20160204740 | System and Method for a Voltage Controlled Oscillator | 07-14-2016 |
20090102571 | CASCODE AMPLIFIER AND DIFFERENTIAL CASCODE VOLTAGE-CONTROLLED OSCILLATOR USING THE SAME - Provided is a differential cascode voltage-controlled oscillator that can reduce a phase noise by the use of a quality factor enhancement technique with negative conductance and can mitigate a ground-caused noise effect by the use of a cascode connection technique. The differential cascode voltage-controlled oscillator includes an AC signal generator, and first through fourth cascode amplifiers. The AC signal generator generates an AC signal with a certain frequency according to a control voltage. The first cascode amplifier is connected in a cascode configuration, and amplifies the AC signal to output the resulting signal to a first output terminal. The second cascode amplifier is connected in a cascode configuration and connected to the first cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to a second output terminal. The third cascode amplifier is connected in a cascode configuration to amplify the AC signal to output the resulting signal to the first output terminal. The fourth cascode amplifier is connected in a cascode configuration and connected to the third cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to the second output terminal. Herein, the first and second cascode amplifiers and the third and fourth cascode amplifiers are symmetrically connected to differentially amplify the AC signal. | 04-23-2009 |
20090115539 | INTEGRATED RC OSCILLATOR WITH HIGH FREQUENCY STABILITY, NOTABLY FOR AN INTEGRATED SWITCHED-MODE POWER SUPPLY - An integrated oscillator ( | 05-07-2009 |
20090315630 | CMOS POWER OSCILLATOR WITH FREQUENCY MODULATION - CMOS power oscillator and a method of frequency modulating a CMOS power oscillator. The oscillator comprises a transformer-based feedback CMOS power oscillator circuit formed on a chip-substrate, the oscillator circuit including a transformer coupled to a transistor; means for modulating the capacitance of the transformer to the chip-substrate for frequency modulating an output of the power oscillator. | 12-24-2009 |
20100219895 | TRANSISTOR-BASED MICROMETRIC OR NANOMETRIC RESONANT DEVICE - The resonant device comprises an electromechanical resonator of nanometric or micrometric size that comprises a mobile element and a fixed element. Detection means provide detection signals representative of movement of the mobile element with respect to the fixed element to a feedback loop that is connected to an excitation input of the resonator. The resonator is formed on the same substrate as the detection means and feedback loop. The feedback loop comprises at most first and second transistors connected in series between a reference voltage and the excitation terminal. A capacitive load is connected between the excitation terminal and reference voltage. The detection signals control the conductivity of the first transistor. | 09-02-2010 |
20110084770 | Oscillator - An oscillator is provided. The oscillator comprises a flip-flop module, a first and a second setting module. The first setting module comprises: a first switch device to generates a first switch signal according to a first oscillating signal, an NMOS and an inverter. The NMOS comprises a drain to receive a first charging current and a gate to receive the first switch signal, wherein the drain is charged or discharged according to the first switch signal. The inverter is connected to the drain to generate a first setting signal. The second setting module comprises a second switch device to generate a second switch signal according to a second oscillating signal and a comparator to generate a second setting signal according to the second switch signal and a reference voltage. The flip-flop module generates the first and the second oscillating signal according to the first and the second setting signal. | 04-14-2011 |
20110102092 | SEMICONDUCTOR INTEGRATED CIRCUIT - A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is detected is provided. The semiconductor integrated circuit includes one or more main oscillation circuits configured to generate a main clock signal by a vibrator, a ring oscillator configured to always operate independently of the main oscillation circuit, a main clock detection circuit configured to monitor the main clock signal on the basis of an output clock signal of the ring oscillator and to determine an operation state of the main oscillation circuit, and an switch circuit configured to switch a combination of elements making up the main oscillation circuit in response to a detection result of the main clock detection circuit. | 05-05-2011 |
20110163820 | VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, PHASE-LOCKED LOOP CIRCUIT USING THE VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, AND SEMICONDUCTOR DEVICE PROVIDED WITH THE SAME - A VCO circuit includes: a control portion to which a first voltage is inputted and from which a second voltage corresponding to the first voltage is outputted; a current source portion to which the second voltage is inputted and from which a current corresponding to the second voltage is outputted; and an oscillator circuit to which the current is inputted and from which a signal with a frequency in accordance with the current is outputted. The control portion includes an adjusting circuit which changes the second voltage in conjunction with fluctuation of a power supply voltage. Accordingly, fluctuation of the frequency Fo of an output signal of the VCO circuit can be suppressed even when the power supply voltage of the VCO circuit fluctuates. | 07-07-2011 |
20120075029 | SEMICONDUCTOR DEVICE - There is provided a semiconductor device having resistance elements small in temperature dependence of the resistance value. The semiconductor device has metal resistance element layers. The metal resistance element layer includes a resistance film layer. The other metal resistance element layer includes another metal resistance film layer. The metal resistance film layer is one of titanium nitride resistance and tantalum nitride resistance. The other metal resistance film layer is the other of the titanium nitride resistance and the tantalum nitride resistance. The resistance value of titanium nitride resistance has a positive temperature coefficient. Whereas, the resistance value of tantalum nitride resistance has a negative temperature coefficient. A contact plug electrically couples the metal resistance film layer with the other metal resistance film layer. Therefore, the temperature coefficient of the titanium nitride resistance and the temperature coefficient of the tantalum nitride resistance cancel each other. This can reduce the temperature coefficient. | 03-29-2012 |
20120206210 | CIRCUITRY AND METHOD FOR PRECISION AMPLITUDE CONTROL IN QUARTZ AND MEMS OSCILLATORS - An oscillator includes oscillator circuitry ( | 08-16-2012 |
20130057353 | LOW CURRENT SINGLE CHIP OSCILLATOR TIMING CIRCUIT - A low current single chip oscillator timing circuit which includes a dual mode capacitor circuit having a larger capacitance mode and a smaller capacitance mode having a fixed ratio. The timing circuit also includes an oscillator circuit that uses the dual mode capacitor circuit as a part of its time base wherein the large capacitance mode is operated with low power consumption and as needed includes a circuit that generates a reference pulse, wherein the short pulse and the reference pulse are compared and the result is used for correction to the oscillator frequency to create a feedback loop. | 03-07-2013 |
20140184345 | CIRCUIT AND METHOD FOR GENERATING OSCILLATING SIGNALS - An oscillator module includes a first MOS transistor and a capacitor. The capacitor is coupled between a gate and source of the first MOS transistor. The drain of the first MOS transistor receives a first bias current and generates an oscillating output signal. A switching circuit operates in response to the oscillating output signal to selective charge and discharge the capacitor. A current sourcing circuit is configured to generate the bias current. The current sourcing circuit includes a second MOS transistor which has an identical layout to the first MOS transistor and receives a second bias current. A resistor is coupled between a gate and source of the second MOS transistor. The current sourcing circuit further includes a current mirror having an input configured to receive a reference current passing through the resistor and generate the first and second bias currents. | 07-03-2014 |
20140292429 | MULTIGATE RESONANT CHANNEL TRANSISTOR - An embodiment includes an oscillator comprising an amplifier formed on a substrate; a multiple gate resonant channel array, formed on the substrate, including: (a) transistors including fins, each of the fins having a channel between source and drain nodes, coupled to common source and drain contacts; and (b) common first and second tri-gates coupled to each of the fins and located between the source and drain contacts; wherein the fins mechanically resonate at a first frequency when one of the first and second tri-gates is periodically activated to produce periodic downward forces on the fins. Other embodiments include a non planar transistor with a channel between the source and drain nodes and a tri-gate on the fin; wherein the fin mechanically resonates when the first tri-gate is periodically activated to produce periodic downward forces on the fin. Other embodiments are described herein. | 10-02-2014 |
20140327486 | RC Oscillator - In an electronic device, an RC oscillator generally includes a resistor, a capacitor and at least one inverter. The resistor and capacitor generate a time-varying voltage. The time-varying voltage is provided to the at least one inverter to cause a clock signal to propagate therethrough. The clock signal propagates with a time delay that is at least partially dependent on a supply voltage. The supply voltage is adjusted to maintain the time delay at almost a constant value. | 11-06-2014 |
20150008987 | CLOCK GENERATION CIRCUIT THAT TRACKS CRITICAL PATH ACROSS PROCESS, VOLTAGE AND TEMPERATURE VARIATION - Clock generation circuit that track critical path across process, voltage and temperature variation. In accordance with a first embodiment of the present invention, an integrated circuit device includes an oscillator electronic circuit on the integrated circuit device configured to produce an oscillating signal and a receiving electronic circuit configured to use the oscillating signal as a system clock. The oscillating signal tracks a frequency-voltage characteristic of the receiving electronic circuit across process, voltage and temperature variations. The oscillating signal may be independent of any off-chip oscillating reference signal. | 01-08-2015 |
20150116047 | SEMICONDUCTOR DEVICE - Disclosed is a semiconductor device. The semiconductor device includes a functional circuit having a resistor formed by a plurality of polysilicon resistors, and in which the property of the functional circuit can be adjusted by trimming the resistor, and in which the polysilicon resistors are coupled in series or in parallel to each other and arranged in a direction perpendicular to one side of the semiconductor device. | 04-30-2015 |
20160065131 | INTEGRATED CIRCUIT COMPRISING A FREQUENCY DEPENDENT CIRCUIT, WIRELESS DEVICE AND METHOD OF ADJUSTING A FREQUENCY - An integrated circuit comprises a frequency dependent circuit comprising an input node, an output node and a main bank of selectable first capacitive elements that affect a frequency characteristic of the frequency dependent circuit. The frequency dependent circuit further comprises at least one shunt bank of selectable second capacitive elements located between ground and one of the input node or the output node, wherein at least one selectable second capacitive element switched out of the frequency dependent circuit is based on a number of the selectable first capacitive elements that are switched into the frequency dependent circuit. | 03-03-2016 |
20160112005 | METHOD AND APPARATUS FOR AN INTEGRATED PN-JUNCTION OSCILLATOR - An integrated oscillator circuit has a plurality oscillator stages including a first oscillator stage, an odd number of intermediate oscillator stages, and a last oscillator stage arranged in series. Each of the oscillator stages has a reverse-biased diode device and a transistor coupled in series between a power supply and a ground. Each diode device has an anode and a cathode, and each transistor has a control terminal for controlling a current flow from a first terminal to a second terminal. In each oscillator stage, the anode of the diode is coupled to the first terminal of the transistor at an internal node. The control terminal of the transistor in each oscillator stage is coupled to the internal node of a proceeding oscillator stage. Further, the control terminal of the transistor in the first oscillator stage is coupled to the internal node of the last oscillator stage. | 04-21-2016 |
20160134236 | Method And System For Frequency Generation - Methods and systems for frequency generation may comprise a circuit with a first input coupled to receive a first satellite signal at a first satellite downlink frequency, a second input coupled to receive a second satellite signal at a second satellite downlink frequency, and a first analog-to-digital converter (ADC) having an input coupled to receive the first satellite signal and an output. The first ADC may be configured to create a first digital output signal representing the first satellite signal. A second ADC having an input coupled to receive the second satellite signal and an output may be configured to create a second digital output representing the second satellite signal. The circuit may comprise a dielectric resonator oscillator having an output and a clock generator circuit having an input coupled to the oscillator output and configured to output one or more clocks used by the first and second ADCs. | 05-12-2016 |
20100176891 | SINGLE-PIN RC OSCILLATOR - Apparatus includes a single-pin input interface, which is operative to sense a voltage across a capacitor of a Resistor-Capacitor (RC) network in which the capacitor is repetitively charging and discharging so that the voltage oscillates as a function of time. A measurement circuit is coupled to measure time durations in which the capacitor is charging and in which the sensed voltage lies between first and second predefined thresholds. A clock generation circuit is coupled to generate an output clock signal having a frequency, and to adjust the frequency responsively to the measured time durations. | 07-15-2010 |
20110285469 | METHOD AND APPARATUS FOR DETERMINING WITHIN-DIE AND ACROSS-DIE VARIATION OF ANALOG CIRCUITS - Described herein is the method and apparatus for determining frequency of an oscillator coupled with one or more analog devices, and for determining within-die or across-die variations in an analog property associated with the one or more analog devices, the determining based on the oscillator frequency. The analog property includes output signal swing, bandwidth, offset, gain, and delay line linearity and range. The one or more analog devices include input-output (I/O) buffer, analog amplifier, and delay line. The method further comprises updating a simulation model file based on the determining of the within-die and/or across-die variations of the analog property. | 11-24-2011 |
20120223781 | NOISE REGULATED LINEAR VOLTAGE CONTROLLED OSCILLATOR - Described embodiments provide a voltage controlled oscillator (VCO) that includes an operational amplifier (opamp). The opamp has a positive power supply input coupled to a power supply voltage, a negative power supply input coupled to a ground node, an inverting input coupled to a control voltage of the VCO, a noninverting input that receives a feedback signal, and an output providing a transistor control voltage. A transistor having a gate terminal coupled to the output of the opamp, a source terminal coupled to the power supply voltage, and a drain terminal coupled to a resistor coupled to ground, generates an output current. A current mirror generates a mirror current based on the output current. A current controlled oscillator (ICO) is coupled to the current mirror, and sets the frequency of the VCO output signal based upon the mirror current. | 09-06-2012 |
20110163819 | VARIABLE PHASE AMPLIFIER CIRCUIT AND METHOD OF USE - A variable phase amplifier circuit is disclosed and its method of use in tuning devices having resonators. The variable phase amplifier receives an input differential signal pair. The input differential signal pair can be generated by a resonator device. The variable phase amplifier generates a modified differential signal pair in response to receiving the input differential signal pair. The variable phase amplifier provides a means to vary the phase of the modified differential signal pair with respect to the input differential signal pair, in an accurate and stable manner. If the modified differential signal pair with a phase shift introduced in it is fed back to the resonator device, the resonator will change its frequency of oscillation, where the new frequency of oscillation is a function of the phase of the modified differential signal pair. | 07-07-2011 |
20120154065 | OSCILLATING CIRCUIT WITH GIANT MAGNETORESISTANCE EFFECT JUNCTIONS - An oscillator including two groups of elementary junctions having giant magnetoresistance effect traversed by electric currents, the junctions of each of the two groups being in series and energized by respective main currents and the voltages across the terminals of the groups being added together to provide a voltage on an output of the oscillating circuit. The voltage across the terminals of one or more junctions of a first group is applied to a first input of a phase comparator and the voltage across the terminals of one or more junctions of the other group is applied to another input of the phase comparator, the phase comparator providing on two outputs secondary currents of the same amplitude and of opposite signs, which are dependent on the mean phase difference between the voltages applied to the inputs, the secondary currents each being added to a respective main current. | 06-21-2012 |
20130009713 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, which comprise a resistance and a capacitance. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitance. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20130009714 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, each of which comprises a resistance and a capacitor. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitor. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20080231382 | Split-blased interpolated voltage-controlled oscillator and phase locked loop - A voltage-controlled oscillator (VCO) of ring-connected stages, where each stage in the VCO has a first set of differential inverters biased by variable bias voltages, and a second set of differential inverters biased by fixed bias voltages. The differential inverters in each stage are connected in parallel with each other. Each set of differential inverters in a stage may contain only one differential inverter. The variable bias voltages are provided by charge pumps and associated circuits as used in well-known self-biasing schemes for phase locked loops. The fixed bias voltages are provided by a biasing circuit, matched to the circuits associated with the charge pumps, but where a fixed control voltage is applied to provide the fixed bias voltages. | 09-25-2008 |
20080266005 | Automatically Tuned Tail Filter - The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It further comprises a tunable filter arrangement connected to the source node of said voltage controlled oscillator (VCO) arrangement. Said filter arrangement particularly comprises an equivalent current source resonating at a second resonance frequency cθf, the second resonance frequency being a multiple n, n=1 or 2 of said first resonance frequency (α>o), n being equal to the minimum number of switch transistors required for oscillation of said VCO arrangement. The filter arrangement particularly comprises an inductor connected in parallel with a capacitor, said capacitor being adapted to be tunable such that the phase noise of the resonating arrangement can be minimized through tuning of the filter arrangement. | 10-30-2008 |
20090002084 | Oscillator - In an oscillator of the present invention, each of field-effect transistors ( | 01-01-2009 |
20100164637 | Oscillation circuit - A differential oscillation circuit according to the present invention is a differential oscillation circuit including a feedback loop circuit. The differential oscillation circuit includes: delay, circuits, cascade-connected one after another on the feedback loop circuit, each delay circuit configured to delay paired differential input signals which the delay circuit receives, and to output the delayed differential signals as paired differential output signals; and an oscillation activation detector circuit configured to detect whether the oscillation circuit is in an oscillation activation state or in a stable state, and to output a detection signal indicating a result of the detection. Furthermore, on the basis of the detection signal outputted from the oscillation activation detector circuit, each of the delay circuits controls output current values of the differential output signals. This circuit configuration enables the speeding up of the oscillation frequency of the circuit. | 07-01-2010 |
20100201454 | VDD-Independent Oscillator Insensitive to Process Variation - An oscillator includes a positive power supply node for providing a positive power supply voltage; a capacitor; and a constant current source providing a first constant current and coupled to the positive power supply node. The first constant current is independent from the positive power supply node. The oscillator also includes a charging current source configured to provide a second constant current to charge the capacitor, wherein the second constant current mirrors the first constant current. The oscillator further includes a constant current source inverter having a third constant current mirroring the first constant current. The constant current source inverter is configured to control the oscillator to transition state at a constant state transition voltage. | 08-12-2010 |
20110050353 | TEMPERATURE COMPENSATED RC OSCILLATOR FOR SIGNAL CONDITIONING ASIC USING SOURCE BULK VOLTAGE OF MOSFET - A temperature compensated CMOS RC oscillator circuit changes the source-bulk voltage to stabilize the MOSFET's threshold voltage variation over temperature using a resistor and temperature-correlated bias current. The MOSFET's source is connected to ground through a resistor. This temperature-correlated bias current also runs through this resistor. When temperature increases, the bias current also increases, which increases the MOSFET's source-bulk voltage. The increased source-bulk voltage helps to stabilize the threshold voltage of MOSFET at high temperature. A power saving logic is also embedded in this oscillator to achieve higher frequency at lower power consumption. In the present invention, there is no high gain op amp or high speed comparator, which makes the resultant oscillator to be low power design and which can be integrated into a single chip with other system. | 03-03-2011 |
20110095831 | PVT-INDEPENDENT CURRENT-CONTROLLED OSCILLATOR - The invention discloses a PVT-independent current-controlled oscillator, including a PV-controller, a current-controlled oscillator and a T-controller. The current-controlled oscillator is coupled to the PV-controller and outputs an oscillation frequency. The T-controller is coupled to the PV-controller and the current-controlled oscillator, providing a total current to be shared by the PV-controller and the current-controlled oscillator, wherein the PV-controller decreases the shared current of the current-controlled oscillator by increasing the shared current of the PV-controller if the oscillation frequency is higher than a predetermined frequency due to a process variation of the current-controlled oscillator, and increases the shared current of the current-controlled oscillator by decreasing the shared current of the PV-controller if the oscillation frequency is lower than the predetermined frequency due to the process variation of the current-controlled oscillator, thereby dynamically adjusting the oscillation frequency. | 04-28-2011 |
20110156825 | OSCILLATING APPARATUS - An oscillating apparatus includes: a transfer gate including a P-channel transistor and a N-channel transistor; a first inverter for inverting an output signal of the transfer gate and outputting the inverted output signal of the transfer gate; a second inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a third inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a fourth inverter for inverting the output signal of the third inverter and outputting the inverted output signal of the third inverter to an input-terminal of the transfer gate; a first capacitor connected between an output-terminal of the transfer gate and an output-terminal of the second inverter; and a second capacitor connected between the output-terminal of the transfer gate and a reference potential node. | 06-30-2011 |
20130300511 | VOLTAGE CONTROLLED OSCILLATOR - A voltage controlled oscillator generating an oscillation signal according to a first control signal without a silent region. The voltage controlled oscillator includes a control signal adjuster and a plurality of delay cells. The control signal adjuster receives the first control signal and generates a second and a third control signal according to the first control signal. The voltage level of the third control signal is higher than that of the second control signal and the voltage level of the second control signal is higher than that of the first control signal. The plurality of delay cells are ring-connected and controlled by the first, the second, and the third control signals to generate the oscillation signal. Each delay cell includes three sets of current generation transistors. The three sets of current generation transistors are separately controlled by the three different control signals. | 11-14-2013 |
20160197582 | MEMORYLESS COMMON-MODE INSENSITIVE AND LOW PULLING VCO | 07-07-2016 |
331108000 |
Integrated modules with discrete elements oscillators | 3 |
20080204155 | OSCILLATOR DEVICES AND METHODS THEREOF - Oscillator devices and methods of operating such oscillator devices are disclosed. The oscillator devices include a current source, and an oscillation module to provide a clock signal. The frequency of the clock signal depends on the relationship between a threshold voltage of a transistor at the oscillation module and the current level provided by the current source. The transistor at the oscillation module is matched to a transistor at the current source so that the frequency of the clock signal is relatively insensitive to changes in device temperature. | 08-28-2008 |
20080204156 | Measuring threshold voltage of transistors in a circuit - In one embodiment, the present invention includes an oscillator to generate a first frequency and a second frequency. The oscillator includes a plurality of stage cells, each stage cell including a first transistor of a first polarity and a second transistor of a second polarity, each coupled between a first voltage node and a first intermediate node and an inverter coupled to the first intermediate node. In operation, a difference between the first frequency and the second frequency is proportional to a threshold voltage of the second transistor. Other embodiments are described and claimed. | 08-28-2008 |
20080231383 | Origami Cascaded Topology For Analog and Mixed-Signal Applications - The present disclosure relates to coupled circuits and methods of coupling circuits having a power supply wherein a plurality of transistors are inductively coupled directly to the power supply for providing a single DC supply voltage directly to each of the plurality of transistors, and wherein a plurality of transformers have primary and secondary windings, the primary and secondary windings providing, at least in part, inductive loads for inductively coupling the plurality of transistors to the power supply, the plurality of transformers also providing an AC signal path for coupling neighboring ones of the plurality of transistors together. | 09-25-2008 |
20080252389 | SINE WAVE OSCILLATOR HAVING A SELF-STARTUP CIRCUIT - Disclosed herein is a sine wave oscillator. The sine wave oscillator includes an operational amplification unit, a first resistor, a first capacitor, a second capacitor, a second resistor, a third resistor, a fourth resistor, and a startup circuit. The first ends of the first resistor and the first capacitor are connected to the plus input terminal of the operational amplification unit. The first end of the second capacitor is connected to the plus input terminal. The first end of the second resistor is connected to the second end of the second capacitor and its second end is connected to the output terminal of the operational amplification unit. The first end of the third resistor is connected to the minus input terminal of the operational amplification unit. The fourth resistor is connected between the minus input terminal and the output terminal. The first end of the startup circuit is connected to the minus input terminal. | 10-16-2008 |
20080258826 | Low Voltage Operational Transconductance Amplifier Circuits - Circuits (FIG. | 10-23-2008 |
20080309422 | Oscillator - An oscillator according to the present invention includes: an active element that oscillates at a predetermined frequency to output a signal of the predetermined frequency; and an impedance element having an impedance that is lower at a frequency lower than the predetermined frequency than at the predetermined frequency, the active element having signal terminals at least one of which is grounded through a series circuit composed of the impedance element and a capacitor. | 12-18-2008 |
20090072917 | OSCILLATION CIRCUIT AND OSCILLATOR - An oscillation circuit includes a cross-coupled circuit having a first active element and a second active element which are differentially connected to each other. The oscillation circuit oscillates in a resonance frequency of a resonator connected between the first active element and the second active element. | 03-19-2009 |
20100001803 | ELECTRONIC CIRCUIT FOR OBTAINING A VARIABLE CAPACITATIVE IMPEDENCE - The invention is characterized in that it comprises a plurality of impedances (R | 01-07-2010 |
20100123523 | STANDING WAVE OSCILLATORS - A standing wave oscillator (SWO) is formed from a microstrip transmission line or a stripline transmission line having a closed-loop single signal trace. Using the microstrip transmission line or stripline transmission line, the SWO can be formed with bends and in complex shapes, which are not so easily realized or possible using coplanar stripline (CPS) transmission lines. Simulation results demonstrate that the microstrip and stripline transmission line based SWOs provide superior operational characteristics (e.g., higher quality factors (Qs)) compared to a CPS transmission line based SWO of similar size and geometry. | 05-20-2010 |
20100231311 | System And Method For Implementing An Oscillator - In one embodiment, a system for generating an oscillating signal includes a transconductance amplifier comprising a single-ended output and a differential input. The system also includes only one feedback loop coupled to the transconductance amplifier. The feedback loop includes a low pass filter configured to receive the output of the transconductance amplifier. Also, the feedback loop includes a high pass filter configured to receive the output of the first low pass filter and output a signal to only one terminal of the differential input of the transconductance amplifier. | 09-16-2010 |
20100237956 | BIAS GENERATION CIRCUIT AND VOLTAGE CONTROLLED OSCILLATOR - This invention includes a bias origination section configured to originate an original bias voltage; a comparison section configured to compare the original bias voltage and a comparison voltage, and output a comparison result; a resistive divider section composed by a resistance circuit including a variable resistor section having a resistor and a switch, and configured to generate the comparison voltage; a bias decision control section configured to determine bias decision data for controlling a resistance value of the variable resistor section so as to bring the comparison voltage close to the original bias voltage, based on a comparison result of the comparison section; and a storage section configured to hold the bias decision data and also output the comparison voltage as a bias voltage by controlling a resistance value of the variable resistor section based on the held bias decision data, thereby generating a low-noise bias with a small area. | 09-23-2010 |
20100271143 | Current-Controlled Hysteretic Oscillator - The disclosed current-controlled hysteretic oscillator operates by controlled currents opposing each other in differential pairs to set a controlled hysteresis for improved relaxation oscillations with immunity to phase or frequency error. | 10-28-2010 |
20100277248 | Systems and methods for generating pulsed output signals using a gated RF oscillator circuit - Systems and methods for generating pulsed output signals that employ a gated RF oscillator circuit having an output that is switchably grounded through the emitter of a transistor and including feedback from the output of the circuit to the base of the transistor to create oscillations and to allow a digital input pulse of a desired length to control the start and stop of oscillations created by the transistor. | 11-04-2010 |
20100289591 | SYSTEM AND METHOD FOR EFFICIENTLY GENERATING AN OSCILLATING SIGNAL - An apparatus for generating an oscillating signal including an oscillator configured to generate the oscillating signal, a controller configured to generate a control signal that controls a characteristic (e.g., amplitude or frequency) of the oscillating signal, and a power supply configured to supply power to the oscillator as a function of the control signal. The power supply may be configured to supply power to the oscillator as a function of the amplitude or frequency of the oscillating signal to improve power efficiency. | 11-18-2010 |
20100327985 | Oscillator Circuit and Method for Generating a Clock Signal - An oscillator circuit comprises a charging block ( | 12-30-2010 |
20110001570 | Oscillation Circuit - An oscillation circuit includes a piezoelectric oscillator, a resistive element, and an exciting circuit connected between an input node and an output node in parallel with one another, a first capacitor connected between the input node and a ground node, and a second capacitor connected between the output node and the ground node. The exciting circuit includes a NAND circuit and first and second inverters that are cascade-connected. Oscillation of the piezoelectric oscillator is started when an enable signal input to the NAND circuit is switched to an H level. | 01-06-2011 |
20110006852 | PLL CIRCUIT AND SEMICONDUCTOR DEVICE HAVING THE SAME - A PLL circuit includes a phase detector, a loop filter (LF), a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares a phase of a signal Fs which is input from outside with a phase of a signal Fo/N which is input from the frequency divider. The loop filter generates a signal Vin by removing alternating current components from a signal input from the phase detector. The voltage-controlled oscillator outputs a signal Fo based on the signal Vin input from the loop filter. The frequency divider converts the signal Fo output from the voltage-controlled oscillator into Fo/N (frequency division by N), and outputs it to the phase detector. | 01-13-2011 |
20110018642 | Differential varactor circuit for a voltage controlled oscillator - According to one exemplary embodiment, a differential varactor circuit for a voltage controlled oscillator having two differential outputs includes a first varactor having first and second terminals and a second varactor having first and second terminals. In the differential varactor circuit, each of the first and second terminals of the first varactor and each of the first and second terminals of the second varactor are coupled to one of the two differential outputs of the voltage controlled oscillator, thereby allowing a size of each of the first and second varactors to be reduced so as to increase varactor quality factor. Each of the first and second terminals of the first varactor can be coupled to one of the two differential outputs by a capacitor, and each of the first and second terminals of the second varactor can be coupled to one of the two differential outputs by a capacitor. | 01-27-2011 |
20110018643 | VOLTAGE CONTROLLED OSCILLATOR WITH MICROSTRIP LINE SUITABLE FOR COARSE ADJUSTMENT OF OSCILLATION FREQUENCY BAND - A voltage controlled oscillator with a microstrip line suitable for coarse adjustment of an oscillation frequency band, the voltage controlled oscillator includes a transistor for oscillation that outputs an oscillation signal; a microstrip line formed on a substrate together with the transistor for oscillation, having one end connected to the transistor for oscillation and the other end connected to a ground electrode formed on the substrate, and thus constituting a part of a frequency determining element that determines a frequency of the oscillation signal according to a line length from the one end of the microstrip line to the ground electrode; and a conductor for coarse adjustment that connects between the one end and the other end of the microstrip line to the ground electrode, thereby reducing the line length of the microstrip line in the connection state. | 01-27-2011 |
20110018644 | OSCILLATOR - Provided is a transformer-based oscillator which is suited to oscillate frequencies in multiple bands. An oscillator includes a transformer resonance unit and a plurality of complementary transistors. The transformer resonance unit includes a primary coil and a secondary coil corresponding to the primary coil. The plurality of complementary transistors have gates and drains between which both ends of the transformer resonance unit are respectively connected. Thus, the oscillator may operate in a differential mode or common mode according to the phase of the transformer resonance unit. Also, a complementary transistor constituting a multiband oscillation loop may be independently connected to both ends of the transformer resonance unit, and an oscillation loop of at least one band may be selected out of a multiband oscillation loop using a switch unit. Thus, the oscillator may be suited to oscillate resonance frequencies in multiple bands. | 01-27-2011 |
20110095832 | Fast start, low power oscillator system - A fast start, low power oscillator system includes an oscillator circuit including an amplifier and a tank circuit, the amplifier including an operating resistance which sets the amplifier operating current and a speed-up circuit including a switching circuit for temporarily increasing the operating current to an elevated level at start-up and then returning it to the original operating current when the oscillator reaches its operating amplitude. | 04-28-2011 |
20110133845 | OSCILLATOR CIRCUIT - The present invention provides an oscillator circuit that can decrease consumed current. Namely, a second PMOS transistor is provided between a first PMOS transistor in which a constant current flows and an NMOS transistor for amplifying an oscillating signal, in order to interrupt the constant current flowing in the first PMOS transistor MP | 06-09-2011 |
20110175685 | MULTI-PRIMARY DISTRIBUTED ACTIVE TRANSFORMER AMPLIFIER POWER SUPPLY AND CONTROL - An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding. | 07-21-2011 |
20110193641 | LOW NOISE OSCILLATORS - An oscillator having: (A) a transistor for producing an oscillating output signal at an output electrode of the transistor. The oscillator includes; (B) a bias circuit for producing a bias signal for the transistor, said bias circuit including an amplifier coupled to the output electrode of the transistor; and (C) a circuit coupled between an output of the amplifier and a control electrode of the transistor, for isolating the bias signal provided by the amplifier from the oscillating signal. | 08-11-2011 |
20110267147 | OSCILLATOR CIRCUIT - An oscillator circuit comprises a push-push oscillator and a differential output, comprising a first and a second output circuit. The push-push oscillator has a first and a second branch. Each of the first and second branch comprises an own voltage divider branch of a common bridge circuit. Each of the first and second voltage divider branches comprises an own pair of micro-strip lines connected in series. Each of the first and second voltage divider branches has an own tap. Both taps are connected to each other by at least one of a first capacity and a micro-strip line. The differential output comprises a first and a second output terminal. The first output terminal is connected via the first output circuit to a first node. The second output terminal is connected via the second output circuit to a second node. Each of the first and second nodes of the push-push oscillator is a common node of both of the first and the second branches. | 11-03-2011 |
20110298550 | Ultra low power oscillator - A frequency generator is provided which is embodied in an integrated circuit manufactured at a process node below 100 nm. The frequency generator comprises a current starved oscillator configured to generate an output frequency signal in dependence on a voltage of a bias signal and a self-biased current generator configured to generate the bias signal, wherein the self-biased current generator comprises a first transistor and a second transistor connected in series. The bias signal is taken from a midpoint between the first transistor and the second transistor, and respective gates of the first and second transistors are connected to keep said first and second transistors in a cut-off state. Accordingly the self-biased current generator operates in a deep sub-threshold state and a current of said bias signal is dependent on a leakage current in the first and second transistors. | 12-08-2011 |
20120019330 | MULTI-SCREW CHAOTIC OSCILLATOR CIRCUIT - There is provided a multi-screw chaotic oscillator circuit with simple configuration, that can use various multi-hysteresis VCCS characteristics and generate a variety of multi-screw attractors. The multi-screw chaotic oscillator circuit comprises: a linear two-port VCCS circuit | 01-26-2012 |
20120038428 | Oscillators and method of operating the same - Oscillators and a method of operating the same are provided, the oscillators include at least one oscillation device including a first magnetic layer having a magnetization direction that is variable, a second magnetic layer having a pinned magnetization direction, and a non-magnetic layer disposed between the first magnetic layer and the second magnetic layer. The oscillation device is configured to generate a signal having a set frequency. The oscillators further include a driving transistor having a drain connected to the at least one oscillation device, and a gate to which a control signal for controlling driving of the oscillation device is applied. | 02-16-2012 |
20120223782 | COMPLEX NEGATIVE FEEDBACK FREQUENCY SELECTION OUTPUT CIRCUIT AND OSCILLATION CIRCUIT USING THE SAME - It is an object to provide a complex negative feedback frequency selection output circuit that can produce an output signal of a high resonance sharpness Q factor and an oscillation circuit using the same. The complex negative feedback frequency selection output circuit according to the present invention, frequency-selectively relays only the residual components of one of a signal in phase with (or a signal opposite in phase to) a feedback processed signal obtained by negative feeding back a feedback signal to an input frequency signal, with a rejected frequency band being left out, while relaying at least a real number component of the other, and comprises a feedback path which relays a difference signal between (or a sum signal of) the selectively relayed output and the relayed output of the real number component, as the feedback signal. The gain of a loop including this feedback path is variable and can be set manually or automatically. | 09-06-2012 |
20120286887 | PHASE LOCKED LOOP CIRCUIT HAVING A VOLTAGE CONTROLLED OSCILLATOR WITH IMPROVED BANDWIDTH - A voltage controlled oscillator includes a plurality of serially connected composite gain stages. A composite gain stage includes a transconductance stage and a transimpedance stage. The transconductance stage has first and second current paths from a first power supply voltage terminal to a second power supply voltage terminal. A first variable resistance is coupled between the first and second current paths. The transimpedance stage has a first inverter and a second inverter. The first inverter has an input terminal coupled to the output of the first current path and an output terminal. The second inverter has an input terminal coupled to the output of the second current path, and an output terminal. A second variable resistance is coupled between the input terminal and the output terminal of the first inverter, and a third variable resistance is coupled between the input terminal and the output terminal of the second inverter. | 11-15-2012 |
20120293271 | Voltage tunable oscillator using bilayer graphene and a lead zirconate titanate capacitor - A voltage controlled oscillator comprising a substrate and a bilayer graphene transistor formed on the substrate. The transistor has two signal terminals and a gate terminal positioned in between the signal terminals. A voltage controlled PZT or MEMS capacitor is also formed on the substrate. The capacitor is electrically connected to the transistor gate terminal. At least one component is connected to the transistor and capacitor to form a resonant circuit. | 11-22-2012 |
20120293272 | Methods And Systems For Generating Millimeter-Wave Oscillations - The various embodiments of the present invention provide improved methods and circuits for generating millimeter-wave oscillations. Generating millimeter-wave oscillations may involve providing a semiconductor device comprising at least two terminals and a polar heterojunction formed from two semiconductor materials. A voltage bias may be applied to at least two terminals of the device in which the voltage enhances a two-dimensional electron gas (2DEG) layer at the polar heterojunction and produces a sharply-peaked but spatially-localized electric field within the 2DEG with a large longitudinal component, wherein the longitudinal component of the electric field serves as a nucleation site for a plurality of propagating dipole domains observable as a plurality of self-sustaining millimeter-wave oscillations. | 11-22-2012 |
20120313718 | OSCILLATION CIRCUIT - A disclosed oscillation circuit includes a constant-voltage generation circuit, an oscillation generation circuit configured to generate an oscillation output, an output circuit including a plurality of parallelly arranged MOSFET circuits, to which a constant voltage generated by the constant-voltage generation circuit is supplied as a supply voltage, output points of the plurality of MOSFET circuits being mutually connected, and a drive circuit configured to drive a selected MOSFET circuit selected in response to a selection input among the plurality of MOSFET circuits by the oscillation output, wherein an output from an unselected MOSFET circuit among the plurality of MOSFET circuits other than the selected MOSFET circuits has a high impedance. | 12-13-2012 |
20120326796 | OSCILLATOR CIRCUT AND ELECTRONIC CIRCUIT COMPRISING THE OSCILLATOR CIRCUIT - An oscillator circuit including a first capacitor provided with a first terminal; a resistor provided with a reference terminal; a first current generator provided with a connection terminal; a second current generator provided with a second connection terminal. Further, the circuit includes a switching matrix between the first and second generators and resistor and the at least one first capacitor. | 12-27-2012 |
20130021108 | OSCILLATOR APPARATUS AND METHOD WITH WIDE ADJUSTABLE FREQUENCY RANGE - An oscillator formed from low cost discrete semiconductors and passive devices creates a linear periodic ramp of constant frequency with ramp slope based on an external voltage signal. Parameters are stable over a wide range of temperatures and variations of transistor parameters that normally degrade in extreme environments. The oscillator period can be phase and frequency synchronized to an external clock source over a wide range of frequencies. The oscillator ramp generator phase can be synchronized on a cycle by cycle basis for incorporation in power converters employing spread spectral EMI reduction techniques, multi-converter systems employing clock interleaving for distribution bus filter optimization, and resonant mode converters employing zero voltage switching techniques. Oscillator ramp rate is independent of frequency and can be synchronized to DC (inhibit) for use in ultra low power burst mode power conversion. | 01-24-2013 |
20130043957 | LOW DISTORTION IMPEDANCE SELECTION AND TUNABLE IMPEDANCE CIRCUITS - A tunable impedance circuit can include a fixed impedance and one or more impedance selection circuits. Each impedance selection circuit can include a first impedance connected to a first interface terminal, a second impedance connected to a second interface terminal, and a plurality of series-connected transistors connected between the first and second impedances. Each impedance selection circuit can also include a plurality of drive impedance networks connected to gates, sources, drains, bodies, and isolation regions of the series-connected transistors, and a control circuit to provide a plurality of control signals to the drive impedance networks to turn on and turn off the series-connected transistors. For each impedance selection circuit, turning on and turning off the respective plurality of series-connected transistors can bring the series combination of the respective first and second impedances into and out of electrical communication with, e.g., into and out of parallel with, the fixed impedance. | 02-21-2013 |
20130082788 | LOW NOISE OSCILLATOR HAVING PASSIVE IMPEDANCE NETWORK - Apparatus and methods are disclosed related to an oscillator that includes a sustaining amplifier. One such apparatus includes a resonant circuit configured to operate at a resonant frequency, a sustaining amplifier, and a passive impedance network. The resonant circuit can have a first terminal and a second terminal. The sustaining amplifier can include at least a first switch configured to drive the first terminal of the resonant circuit in response to an input at a first control terminal of the first switch. The passive impedance network can be configured to pass a bias to the first control terminal, such as a gate of a field effect transistor, of the first switch. The passive impedance network can be electrically coupled to the second terminal of the resonant circuit and can include at least one inductor. | 04-04-2013 |
20130106525 | SINGLE-STAGED BALANCED-OUTPUT INDUCTOR-FREE OSCILLATOR AND METHOD THEREOF | 05-02-2013 |
20130113574 | OSCILLATING DEVICE - The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits. | 05-09-2013 |
20130285755 | SYSTEM AND METHOD FOR SUPPORTING DIFFERENT TYPES OF OSCILLATOR CIRCUITS - In accordance with some embodiments of the present disclosure, an oscillator circuit comprises, a first pad associated with a first terminal of an oscillator and a second pad associated with a second terminal of the oscillator. The oscillator is configured to generate an oscillating signal and communicate the oscillating signal from the second terminal to a clock distributor coupled to the second pad. The oscillator circuit further comprises an oscillator gain element comprising an output node coupled to the first pad and an input node coupled to the second pad. The oscillator circuit also comprises a digital-to-analog converter (DAC) coupled to the first pad. The oscillator circuit additionally comprises a switching circuit coupled to the gain element. The switching circuit is configured to enable the gain element when the oscillator comprises a resonator and disable the gain element when the oscillator comprises a voltage controlled oscillating module. | 10-31-2013 |
20140055205 | OSCILLATOR FOR A POWDER SPRAY COATING DEVICE - An oscillator ( | 02-27-2014 |
20140139295 | LOW POWER VOLTAGE CONTROLLED OSCILLATOR - An enhanced negative resistance voltage controlled oscillator (VCO) is provided, in which the body of each transistor within a pair of cross-coupled transistors is coupled to the gate of the same transistor through a resistor. The body transconductance is employed to enhance the negative resistance of the cross-coupled pair of transistors. At the same time, a forward body bias voltage reduces the threshold voltage of the cross-coupled pair to allow the VCO to operate at a low power supply voltage. Further, the resistor connected between the body and the drain of each transistor voids the leakage in the substrate, and thus, reduces power consumption of the VCO further. This VCO provides low power operation with enhanced figure of merit without employing any extra inductors besides the inductors that are part of the LC tank. | 05-22-2014 |
20140203880 | BIAS CURRENT CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - A bias current circuit controls an oscillator that generates an oscillation signal of a frequency corresponding to an input current. The circuit includes a part that detects fluctuation of a control current for variably controlling the frequency of the oscillation signal and a part that generates an input current in which a fluctuation component of the control current is canceled using a current for cancelling the detected fluctuation of the control current. | 07-24-2014 |
20160006393 | OSCILLATOR AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - An oscillator includes a flip-flop that outputs a first signal having a phase that is inverted according to a comparison signal, a comparison circuit that compares an amplification voltage with a first reference voltage and outputs the comparison signal, a current source having an output voltage that is fixed to a second reference voltage, and an amplification circuit that generates the amplification voltage according to a current outputted from the current source and the second reference voltage. | 01-07-2016 |
20160028347 | OSCILLATOR CIRCUIT AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - Controllability of an oscillator circuit is improved. The oscillator circuit has inverters in odd-numbered stages. A circuit is electrically connected to a power supply node of the inverters to which a high power supply potential is input. The circuit includes a first transistor, a second transistor, and a capacitor. The first transistor includes an oxide semiconductor in its channel. A holding circuit including the first transistor and the capacitor has a function of holding an analog potential that is input from the outside. The potential held by the holding circuit is input to a gate of the second transistor. A power supply potential is supplied to the inverters through the second transistor, so that the delay time of the inverter can be controlled by the potential of the gate of the second transistor. | 01-28-2016 |
20160048152 | CURRENT MIRROR WITH DEPLETION MODE MOS AND EMBEDDED NOISE FILTER - A current mirror with depletion mode MOS devices, and an embedded noise filter, operable with low supply voltage to provide a low-noise mirror current. The current mirror includes depletion-mode MOS transistors M | 02-18-2016 |
20160065130 | OSCILLATOR WITH DIFFERENTIAL STRUCTURE - An oscillator with a differential structure which is formed in an integrated circuit, including: a first transistor and a second transistor in each of which a drain electrode, a gate electrode, and a source electrode are sequentially arranged, a drain of the first transistor is connected with a gate of the second transistor through a first wiring, a drain of the second transistor is connected with a gate of the first transistor through a second wiring, and a first end of a source of the first transistor and a first end of a source of the second transistor are connected through a third wiring, and a second end of the source of the first transistor and a second end of the source of the second transistor are connected through a fourth wiring. | 03-03-2016 |
20160065186 | ADJUSTING THE MAGNITUDE OF A CAPACITANCE OF A DIGITALLY CONTROLLED CIRCUIT - An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | 03-03-2016 |
20160105148 | RC OSCILLATOR - A method includes using a current source to provide a charging current to a capacitor of a resistor-capacitor (RC) tank of an RC oscillator. The method includes using a resistor of the current source as a resistor for the RC tank. | 04-14-2016 |
20160126888 | SEMICONDUCTOR DEVICE - An object of the present invention is to provide a semiconductor device including an oscillator circuit including a circuit between inverters. In the circuit, a sum of the length (a | 05-05-2016 |
20160204740 | System and Method for a Voltage Controlled Oscillator | 07-14-2016 |
20090102571 | CASCODE AMPLIFIER AND DIFFERENTIAL CASCODE VOLTAGE-CONTROLLED OSCILLATOR USING THE SAME - Provided is a differential cascode voltage-controlled oscillator that can reduce a phase noise by the use of a quality factor enhancement technique with negative conductance and can mitigate a ground-caused noise effect by the use of a cascode connection technique. The differential cascode voltage-controlled oscillator includes an AC signal generator, and first through fourth cascode amplifiers. The AC signal generator generates an AC signal with a certain frequency according to a control voltage. The first cascode amplifier is connected in a cascode configuration, and amplifies the AC signal to output the resulting signal to a first output terminal. The second cascode amplifier is connected in a cascode configuration and connected to the first cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to a second output terminal. The third cascode amplifier is connected in a cascode configuration to amplify the AC signal to output the resulting signal to the first output terminal. The fourth cascode amplifier is connected in a cascode configuration and connected to the third cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to the second output terminal. Herein, the first and second cascode amplifiers and the third and fourth cascode amplifiers are symmetrically connected to differentially amplify the AC signal. | 04-23-2009 |
20090115539 | INTEGRATED RC OSCILLATOR WITH HIGH FREQUENCY STABILITY, NOTABLY FOR AN INTEGRATED SWITCHED-MODE POWER SUPPLY - An integrated oscillator ( | 05-07-2009 |
20090315630 | CMOS POWER OSCILLATOR WITH FREQUENCY MODULATION - CMOS power oscillator and a method of frequency modulating a CMOS power oscillator. The oscillator comprises a transformer-based feedback CMOS power oscillator circuit formed on a chip-substrate, the oscillator circuit including a transformer coupled to a transistor; means for modulating the capacitance of the transformer to the chip-substrate for frequency modulating an output of the power oscillator. | 12-24-2009 |
20100219895 | TRANSISTOR-BASED MICROMETRIC OR NANOMETRIC RESONANT DEVICE - The resonant device comprises an electromechanical resonator of nanometric or micrometric size that comprises a mobile element and a fixed element. Detection means provide detection signals representative of movement of the mobile element with respect to the fixed element to a feedback loop that is connected to an excitation input of the resonator. The resonator is formed on the same substrate as the detection means and feedback loop. The feedback loop comprises at most first and second transistors connected in series between a reference voltage and the excitation terminal. A capacitive load is connected between the excitation terminal and reference voltage. The detection signals control the conductivity of the first transistor. | 09-02-2010 |
20110084770 | Oscillator - An oscillator is provided. The oscillator comprises a flip-flop module, a first and a second setting module. The first setting module comprises: a first switch device to generates a first switch signal according to a first oscillating signal, an NMOS and an inverter. The NMOS comprises a drain to receive a first charging current and a gate to receive the first switch signal, wherein the drain is charged or discharged according to the first switch signal. The inverter is connected to the drain to generate a first setting signal. The second setting module comprises a second switch device to generate a second switch signal according to a second oscillating signal and a comparator to generate a second setting signal according to the second switch signal and a reference voltage. The flip-flop module generates the first and the second oscillating signal according to the first and the second setting signal. | 04-14-2011 |
20110102092 | SEMICONDUCTOR INTEGRATED CIRCUIT - A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is detected is provided. The semiconductor integrated circuit includes one or more main oscillation circuits configured to generate a main clock signal by a vibrator, a ring oscillator configured to always operate independently of the main oscillation circuit, a main clock detection circuit configured to monitor the main clock signal on the basis of an output clock signal of the ring oscillator and to determine an operation state of the main oscillation circuit, and an switch circuit configured to switch a combination of elements making up the main oscillation circuit in response to a detection result of the main clock detection circuit. | 05-05-2011 |
20110163820 | VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, PHASE-LOCKED LOOP CIRCUIT USING THE VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, AND SEMICONDUCTOR DEVICE PROVIDED WITH THE SAME - A VCO circuit includes: a control portion to which a first voltage is inputted and from which a second voltage corresponding to the first voltage is outputted; a current source portion to which the second voltage is inputted and from which a current corresponding to the second voltage is outputted; and an oscillator circuit to which the current is inputted and from which a signal with a frequency in accordance with the current is outputted. The control portion includes an adjusting circuit which changes the second voltage in conjunction with fluctuation of a power supply voltage. Accordingly, fluctuation of the frequency Fo of an output signal of the VCO circuit can be suppressed even when the power supply voltage of the VCO circuit fluctuates. | 07-07-2011 |
20120075029 | SEMICONDUCTOR DEVICE - There is provided a semiconductor device having resistance elements small in temperature dependence of the resistance value. The semiconductor device has metal resistance element layers. The metal resistance element layer includes a resistance film layer. The other metal resistance element layer includes another metal resistance film layer. The metal resistance film layer is one of titanium nitride resistance and tantalum nitride resistance. The other metal resistance film layer is the other of the titanium nitride resistance and the tantalum nitride resistance. The resistance value of titanium nitride resistance has a positive temperature coefficient. Whereas, the resistance value of tantalum nitride resistance has a negative temperature coefficient. A contact plug electrically couples the metal resistance film layer with the other metal resistance film layer. Therefore, the temperature coefficient of the titanium nitride resistance and the temperature coefficient of the tantalum nitride resistance cancel each other. This can reduce the temperature coefficient. | 03-29-2012 |
20120206210 | CIRCUITRY AND METHOD FOR PRECISION AMPLITUDE CONTROL IN QUARTZ AND MEMS OSCILLATORS - An oscillator includes oscillator circuitry ( | 08-16-2012 |
20130057353 | LOW CURRENT SINGLE CHIP OSCILLATOR TIMING CIRCUIT - A low current single chip oscillator timing circuit which includes a dual mode capacitor circuit having a larger capacitance mode and a smaller capacitance mode having a fixed ratio. The timing circuit also includes an oscillator circuit that uses the dual mode capacitor circuit as a part of its time base wherein the large capacitance mode is operated with low power consumption and as needed includes a circuit that generates a reference pulse, wherein the short pulse and the reference pulse are compared and the result is used for correction to the oscillator frequency to create a feedback loop. | 03-07-2013 |
20140184345 | CIRCUIT AND METHOD FOR GENERATING OSCILLATING SIGNALS - An oscillator module includes a first MOS transistor and a capacitor. The capacitor is coupled between a gate and source of the first MOS transistor. The drain of the first MOS transistor receives a first bias current and generates an oscillating output signal. A switching circuit operates in response to the oscillating output signal to selective charge and discharge the capacitor. A current sourcing circuit is configured to generate the bias current. The current sourcing circuit includes a second MOS transistor which has an identical layout to the first MOS transistor and receives a second bias current. A resistor is coupled between a gate and source of the second MOS transistor. The current sourcing circuit further includes a current mirror having an input configured to receive a reference current passing through the resistor and generate the first and second bias currents. | 07-03-2014 |
20140292429 | MULTIGATE RESONANT CHANNEL TRANSISTOR - An embodiment includes an oscillator comprising an amplifier formed on a substrate; a multiple gate resonant channel array, formed on the substrate, including: (a) transistors including fins, each of the fins having a channel between source and drain nodes, coupled to common source and drain contacts; and (b) common first and second tri-gates coupled to each of the fins and located between the source and drain contacts; wherein the fins mechanically resonate at a first frequency when one of the first and second tri-gates is periodically activated to produce periodic downward forces on the fins. Other embodiments include a non planar transistor with a channel between the source and drain nodes and a tri-gate on the fin; wherein the fin mechanically resonates when the first tri-gate is periodically activated to produce periodic downward forces on the fin. Other embodiments are described herein. | 10-02-2014 |
20140327486 | RC Oscillator - In an electronic device, an RC oscillator generally includes a resistor, a capacitor and at least one inverter. The resistor and capacitor generate a time-varying voltage. The time-varying voltage is provided to the at least one inverter to cause a clock signal to propagate therethrough. The clock signal propagates with a time delay that is at least partially dependent on a supply voltage. The supply voltage is adjusted to maintain the time delay at almost a constant value. | 11-06-2014 |
20150008987 | CLOCK GENERATION CIRCUIT THAT TRACKS CRITICAL PATH ACROSS PROCESS, VOLTAGE AND TEMPERATURE VARIATION - Clock generation circuit that track critical path across process, voltage and temperature variation. In accordance with a first embodiment of the present invention, an integrated circuit device includes an oscillator electronic circuit on the integrated circuit device configured to produce an oscillating signal and a receiving electronic circuit configured to use the oscillating signal as a system clock. The oscillating signal tracks a frequency-voltage characteristic of the receiving electronic circuit across process, voltage and temperature variations. The oscillating signal may be independent of any off-chip oscillating reference signal. | 01-08-2015 |
20150116047 | SEMICONDUCTOR DEVICE - Disclosed is a semiconductor device. The semiconductor device includes a functional circuit having a resistor formed by a plurality of polysilicon resistors, and in which the property of the functional circuit can be adjusted by trimming the resistor, and in which the polysilicon resistors are coupled in series or in parallel to each other and arranged in a direction perpendicular to one side of the semiconductor device. | 04-30-2015 |
20160065131 | INTEGRATED CIRCUIT COMPRISING A FREQUENCY DEPENDENT CIRCUIT, WIRELESS DEVICE AND METHOD OF ADJUSTING A FREQUENCY - An integrated circuit comprises a frequency dependent circuit comprising an input node, an output node and a main bank of selectable first capacitive elements that affect a frequency characteristic of the frequency dependent circuit. The frequency dependent circuit further comprises at least one shunt bank of selectable second capacitive elements located between ground and one of the input node or the output node, wherein at least one selectable second capacitive element switched out of the frequency dependent circuit is based on a number of the selectable first capacitive elements that are switched into the frequency dependent circuit. | 03-03-2016 |
20160112005 | METHOD AND APPARATUS FOR AN INTEGRATED PN-JUNCTION OSCILLATOR - An integrated oscillator circuit has a plurality oscillator stages including a first oscillator stage, an odd number of intermediate oscillator stages, and a last oscillator stage arranged in series. Each of the oscillator stages has a reverse-biased diode device and a transistor coupled in series between a power supply and a ground. Each diode device has an anode and a cathode, and each transistor has a control terminal for controlling a current flow from a first terminal to a second terminal. In each oscillator stage, the anode of the diode is coupled to the first terminal of the transistor at an internal node. The control terminal of the transistor in each oscillator stage is coupled to the internal node of a proceeding oscillator stage. Further, the control terminal of the transistor in the first oscillator stage is coupled to the internal node of the last oscillator stage. | 04-21-2016 |
20160134236 | Method And System For Frequency Generation - Methods and systems for frequency generation may comprise a circuit with a first input coupled to receive a first satellite signal at a first satellite downlink frequency, a second input coupled to receive a second satellite signal at a second satellite downlink frequency, and a first analog-to-digital converter (ADC) having an input coupled to receive the first satellite signal and an output. The first ADC may be configured to create a first digital output signal representing the first satellite signal. A second ADC having an input coupled to receive the second satellite signal and an output may be configured to create a second digital output representing the second satellite signal. The circuit may comprise a dielectric resonator oscillator having an output and a clock generator circuit having an input coupled to the oscillator output and configured to output one or more clocks used by the first and second ADCs. | 05-12-2016 |
20100176891 | SINGLE-PIN RC OSCILLATOR - Apparatus includes a single-pin input interface, which is operative to sense a voltage across a capacitor of a Resistor-Capacitor (RC) network in which the capacitor is repetitively charging and discharging so that the voltage oscillates as a function of time. A measurement circuit is coupled to measure time durations in which the capacitor is charging and in which the sensed voltage lies between first and second predefined thresholds. A clock generation circuit is coupled to generate an output clock signal having a frequency, and to adjust the frequency responsively to the measured time durations. | 07-15-2010 |
20110285469 | METHOD AND APPARATUS FOR DETERMINING WITHIN-DIE AND ACROSS-DIE VARIATION OF ANALOG CIRCUITS - Described herein is the method and apparatus for determining frequency of an oscillator coupled with one or more analog devices, and for determining within-die or across-die variations in an analog property associated with the one or more analog devices, the determining based on the oscillator frequency. The analog property includes output signal swing, bandwidth, offset, gain, and delay line linearity and range. The one or more analog devices include input-output (I/O) buffer, analog amplifier, and delay line. The method further comprises updating a simulation model file based on the determining of the within-die and/or across-die variations of the analog property. | 11-24-2011 |
20120223781 | NOISE REGULATED LINEAR VOLTAGE CONTROLLED OSCILLATOR - Described embodiments provide a voltage controlled oscillator (VCO) that includes an operational amplifier (opamp). The opamp has a positive power supply input coupled to a power supply voltage, a negative power supply input coupled to a ground node, an inverting input coupled to a control voltage of the VCO, a noninverting input that receives a feedback signal, and an output providing a transistor control voltage. A transistor having a gate terminal coupled to the output of the opamp, a source terminal coupled to the power supply voltage, and a drain terminal coupled to a resistor coupled to ground, generates an output current. A current mirror generates a mirror current based on the output current. A current controlled oscillator (ICO) is coupled to the current mirror, and sets the frequency of the VCO output signal based upon the mirror current. | 09-06-2012 |
20110163819 | VARIABLE PHASE AMPLIFIER CIRCUIT AND METHOD OF USE - A variable phase amplifier circuit is disclosed and its method of use in tuning devices having resonators. The variable phase amplifier receives an input differential signal pair. The input differential signal pair can be generated by a resonator device. The variable phase amplifier generates a modified differential signal pair in response to receiving the input differential signal pair. The variable phase amplifier provides a means to vary the phase of the modified differential signal pair with respect to the input differential signal pair, in an accurate and stable manner. If the modified differential signal pair with a phase shift introduced in it is fed back to the resonator device, the resonator will change its frequency of oscillation, where the new frequency of oscillation is a function of the phase of the modified differential signal pair. | 07-07-2011 |
20120154065 | OSCILLATING CIRCUIT WITH GIANT MAGNETORESISTANCE EFFECT JUNCTIONS - An oscillator including two groups of elementary junctions having giant magnetoresistance effect traversed by electric currents, the junctions of each of the two groups being in series and energized by respective main currents and the voltages across the terminals of the groups being added together to provide a voltage on an output of the oscillating circuit. The voltage across the terminals of one or more junctions of a first group is applied to a first input of a phase comparator and the voltage across the terminals of one or more junctions of the other group is applied to another input of the phase comparator, the phase comparator providing on two outputs secondary currents of the same amplitude and of opposite signs, which are dependent on the mean phase difference between the voltages applied to the inputs, the secondary currents each being added to a respective main current. | 06-21-2012 |
20130009713 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, which comprise a resistance and a capacitance. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitance. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20130009714 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, each of which comprises a resistance and a capacitor. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitor. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20080231382 | Split-blased interpolated voltage-controlled oscillator and phase locked loop - A voltage-controlled oscillator (VCO) of ring-connected stages, where each stage in the VCO has a first set of differential inverters biased by variable bias voltages, and a second set of differential inverters biased by fixed bias voltages. The differential inverters in each stage are connected in parallel with each other. Each set of differential inverters in a stage may contain only one differential inverter. The variable bias voltages are provided by charge pumps and associated circuits as used in well-known self-biasing schemes for phase locked loops. The fixed bias voltages are provided by a biasing circuit, matched to the circuits associated with the charge pumps, but where a fixed control voltage is applied to provide the fixed bias voltages. | 09-25-2008 |
20080266005 | Automatically Tuned Tail Filter - The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It further comprises a tunable filter arrangement connected to the source node of said voltage controlled oscillator (VCO) arrangement. Said filter arrangement particularly comprises an equivalent current source resonating at a second resonance frequency cθf, the second resonance frequency being a multiple n, n=1 or 2 of said first resonance frequency (α>o), n being equal to the minimum number of switch transistors required for oscillation of said VCO arrangement. The filter arrangement particularly comprises an inductor connected in parallel with a capacitor, said capacitor being adapted to be tunable such that the phase noise of the resonating arrangement can be minimized through tuning of the filter arrangement. | 10-30-2008 |
20090002084 | Oscillator - In an oscillator of the present invention, each of field-effect transistors ( | 01-01-2009 |
20100164637 | Oscillation circuit - A differential oscillation circuit according to the present invention is a differential oscillation circuit including a feedback loop circuit. The differential oscillation circuit includes: delay, circuits, cascade-connected one after another on the feedback loop circuit, each delay circuit configured to delay paired differential input signals which the delay circuit receives, and to output the delayed differential signals as paired differential output signals; and an oscillation activation detector circuit configured to detect whether the oscillation circuit is in an oscillation activation state or in a stable state, and to output a detection signal indicating a result of the detection. Furthermore, on the basis of the detection signal outputted from the oscillation activation detector circuit, each of the delay circuits controls output current values of the differential output signals. This circuit configuration enables the speeding up of the oscillation frequency of the circuit. | 07-01-2010 |
20100201454 | VDD-Independent Oscillator Insensitive to Process Variation - An oscillator includes a positive power supply node for providing a positive power supply voltage; a capacitor; and a constant current source providing a first constant current and coupled to the positive power supply node. The first constant current is independent from the positive power supply node. The oscillator also includes a charging current source configured to provide a second constant current to charge the capacitor, wherein the second constant current mirrors the first constant current. The oscillator further includes a constant current source inverter having a third constant current mirroring the first constant current. The constant current source inverter is configured to control the oscillator to transition state at a constant state transition voltage. | 08-12-2010 |
20110050353 | TEMPERATURE COMPENSATED RC OSCILLATOR FOR SIGNAL CONDITIONING ASIC USING SOURCE BULK VOLTAGE OF MOSFET - A temperature compensated CMOS RC oscillator circuit changes the source-bulk voltage to stabilize the MOSFET's threshold voltage variation over temperature using a resistor and temperature-correlated bias current. The MOSFET's source is connected to ground through a resistor. This temperature-correlated bias current also runs through this resistor. When temperature increases, the bias current also increases, which increases the MOSFET's source-bulk voltage. The increased source-bulk voltage helps to stabilize the threshold voltage of MOSFET at high temperature. A power saving logic is also embedded in this oscillator to achieve higher frequency at lower power consumption. In the present invention, there is no high gain op amp or high speed comparator, which makes the resultant oscillator to be low power design and which can be integrated into a single chip with other system. | 03-03-2011 |
20110095831 | PVT-INDEPENDENT CURRENT-CONTROLLED OSCILLATOR - The invention discloses a PVT-independent current-controlled oscillator, including a PV-controller, a current-controlled oscillator and a T-controller. The current-controlled oscillator is coupled to the PV-controller and outputs an oscillation frequency. The T-controller is coupled to the PV-controller and the current-controlled oscillator, providing a total current to be shared by the PV-controller and the current-controlled oscillator, wherein the PV-controller decreases the shared current of the current-controlled oscillator by increasing the shared current of the PV-controller if the oscillation frequency is higher than a predetermined frequency due to a process variation of the current-controlled oscillator, and increases the shared current of the current-controlled oscillator by decreasing the shared current of the PV-controller if the oscillation frequency is lower than the predetermined frequency due to the process variation of the current-controlled oscillator, thereby dynamically adjusting the oscillation frequency. | 04-28-2011 |
20110156825 | OSCILLATING APPARATUS - An oscillating apparatus includes: a transfer gate including a P-channel transistor and a N-channel transistor; a first inverter for inverting an output signal of the transfer gate and outputting the inverted output signal of the transfer gate; a second inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a third inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a fourth inverter for inverting the output signal of the third inverter and outputting the inverted output signal of the third inverter to an input-terminal of the transfer gate; a first capacitor connected between an output-terminal of the transfer gate and an output-terminal of the second inverter; and a second capacitor connected between the output-terminal of the transfer gate and a reference potential node. | 06-30-2011 |
20130300511 | VOLTAGE CONTROLLED OSCILLATOR - A voltage controlled oscillator generating an oscillation signal according to a first control signal without a silent region. The voltage controlled oscillator includes a control signal adjuster and a plurality of delay cells. The control signal adjuster receives the first control signal and generates a second and a third control signal according to the first control signal. The voltage level of the third control signal is higher than that of the second control signal and the voltage level of the second control signal is higher than that of the first control signal. The plurality of delay cells are ring-connected and controlled by the first, the second, and the third control signals to generate the oscillation signal. Each delay cell includes three sets of current generation transistors. The three sets of current generation transistors are separately controlled by the three different control signals. | 11-14-2013 |
20160197582 | MEMORYLESS COMMON-MODE INSENSITIVE AND LOW PULLING VCO | 07-07-2016 |
331114000 |
Push-pull | 2 |
20140097910 | MONOLITHIC BAND SWITCHED COUPLED PUSH-PUSH OSCILLATOR - As provided herein, in some embodiments, monolithic oscillators with low phase noise, large swing voltages, wide tuning, and high frequency characteristics are obtained by a monolithic integrated circuit having an oscillator core configured to generate a first output signal, and one or more tuning units operatively coupled to the oscillator core. In some embodiments, the oscillator core is a push-push oscillator core having a bipolar junction transistor, and each of the tuning units uses a FET transistor to present a selectable capacitance. In some embodiments, the tuning units have high-voltage and high-frequency capabilities. In some embodiments, the tuning units use MEMS switches to selectively connect capacitances to the oscillator core. In some embodiments, the oscillator core generates a second signal that has twice the frequency of the first frequency. | 04-10-2014 |
20160191030 | VOLTAGE CONTROLLED DELAY CIRCUIT AND VOLTAGE CONTROLLED OSCILLATOR INCLUDING THE SAME - A voltage controlled delay circuit may include a first PMOS transistor suitable for pull-up driving a first differential output node in response to a voltage of the first differential output node, a second PMOS transistor suitable for pull-down driving a second differential output node in response to a voltage of the second differential output node, a third PMOS transistor suitable for pull-up driving the first differential output node in response to a pull-up control voltage, a fourth PMOS transistor suitable for pull-up driving the second differential output node in response to the pull-up control voltage, a first resistor suitable for pull-up driving the first differential output node, a second resistor suitable for pull-up driving the second differential output node, a first NMOS transistor suitable for pull-down driving the first differential output node in response to a voltage of a second differential input node, and a second NMOS transistor suitable for pull-down driving the second differential output node in response to a voltage of a first differential input node. | 06-30-2016 |
Entries |
Document | Title | Date |
20080204155 | OSCILLATOR DEVICES AND METHODS THEREOF - Oscillator devices and methods of operating such oscillator devices are disclosed. The oscillator devices include a current source, and an oscillation module to provide a clock signal. The frequency of the clock signal depends on the relationship between a threshold voltage of a transistor at the oscillation module and the current level provided by the current source. The transistor at the oscillation module is matched to a transistor at the current source so that the frequency of the clock signal is relatively insensitive to changes in device temperature. | 08-28-2008 |
20080204156 | Measuring threshold voltage of transistors in a circuit - In one embodiment, the present invention includes an oscillator to generate a first frequency and a second frequency. The oscillator includes a plurality of stage cells, each stage cell including a first transistor of a first polarity and a second transistor of a second polarity, each coupled between a first voltage node and a first intermediate node and an inverter coupled to the first intermediate node. In operation, a difference between the first frequency and the second frequency is proportional to a threshold voltage of the second transistor. Other embodiments are described and claimed. | 08-28-2008 |
20080231383 | Origami Cascaded Topology For Analog and Mixed-Signal Applications - The present disclosure relates to coupled circuits and methods of coupling circuits having a power supply wherein a plurality of transistors are inductively coupled directly to the power supply for providing a single DC supply voltage directly to each of the plurality of transistors, and wherein a plurality of transformers have primary and secondary windings, the primary and secondary windings providing, at least in part, inductive loads for inductively coupling the plurality of transistors to the power supply, the plurality of transformers also providing an AC signal path for coupling neighboring ones of the plurality of transistors together. | 09-25-2008 |
20080252389 | SINE WAVE OSCILLATOR HAVING A SELF-STARTUP CIRCUIT - Disclosed herein is a sine wave oscillator. The sine wave oscillator includes an operational amplification unit, a first resistor, a first capacitor, a second capacitor, a second resistor, a third resistor, a fourth resistor, and a startup circuit. The first ends of the first resistor and the first capacitor are connected to the plus input terminal of the operational amplification unit. The first end of the second capacitor is connected to the plus input terminal. The first end of the second resistor is connected to the second end of the second capacitor and its second end is connected to the output terminal of the operational amplification unit. The first end of the third resistor is connected to the minus input terminal of the operational amplification unit. The fourth resistor is connected between the minus input terminal and the output terminal. The first end of the startup circuit is connected to the minus input terminal. | 10-16-2008 |
20080258826 | Low Voltage Operational Transconductance Amplifier Circuits - Circuits (FIG. | 10-23-2008 |
20080309422 | Oscillator - An oscillator according to the present invention includes: an active element that oscillates at a predetermined frequency to output a signal of the predetermined frequency; and an impedance element having an impedance that is lower at a frequency lower than the predetermined frequency than at the predetermined frequency, the active element having signal terminals at least one of which is grounded through a series circuit composed of the impedance element and a capacitor. | 12-18-2008 |
20090072917 | OSCILLATION CIRCUIT AND OSCILLATOR - An oscillation circuit includes a cross-coupled circuit having a first active element and a second active element which are differentially connected to each other. The oscillation circuit oscillates in a resonance frequency of a resonator connected between the first active element and the second active element. | 03-19-2009 |
20100001803 | ELECTRONIC CIRCUIT FOR OBTAINING A VARIABLE CAPACITATIVE IMPEDENCE - The invention is characterized in that it comprises a plurality of impedances (R | 01-07-2010 |
20100123523 | STANDING WAVE OSCILLATORS - A standing wave oscillator (SWO) is formed from a microstrip transmission line or a stripline transmission line having a closed-loop single signal trace. Using the microstrip transmission line or stripline transmission line, the SWO can be formed with bends and in complex shapes, which are not so easily realized or possible using coplanar stripline (CPS) transmission lines. Simulation results demonstrate that the microstrip and stripline transmission line based SWOs provide superior operational characteristics (e.g., higher quality factors (Qs)) compared to a CPS transmission line based SWO of similar size and geometry. | 05-20-2010 |
20100231311 | System And Method For Implementing An Oscillator - In one embodiment, a system for generating an oscillating signal includes a transconductance amplifier comprising a single-ended output and a differential input. The system also includes only one feedback loop coupled to the transconductance amplifier. The feedback loop includes a low pass filter configured to receive the output of the transconductance amplifier. Also, the feedback loop includes a high pass filter configured to receive the output of the first low pass filter and output a signal to only one terminal of the differential input of the transconductance amplifier. | 09-16-2010 |
20100237956 | BIAS GENERATION CIRCUIT AND VOLTAGE CONTROLLED OSCILLATOR - This invention includes a bias origination section configured to originate an original bias voltage; a comparison section configured to compare the original bias voltage and a comparison voltage, and output a comparison result; a resistive divider section composed by a resistance circuit including a variable resistor section having a resistor and a switch, and configured to generate the comparison voltage; a bias decision control section configured to determine bias decision data for controlling a resistance value of the variable resistor section so as to bring the comparison voltage close to the original bias voltage, based on a comparison result of the comparison section; and a storage section configured to hold the bias decision data and also output the comparison voltage as a bias voltage by controlling a resistance value of the variable resistor section based on the held bias decision data, thereby generating a low-noise bias with a small area. | 09-23-2010 |
20100271143 | Current-Controlled Hysteretic Oscillator - The disclosed current-controlled hysteretic oscillator operates by controlled currents opposing each other in differential pairs to set a controlled hysteresis for improved relaxation oscillations with immunity to phase or frequency error. | 10-28-2010 |
20100277248 | Systems and methods for generating pulsed output signals using a gated RF oscillator circuit - Systems and methods for generating pulsed output signals that employ a gated RF oscillator circuit having an output that is switchably grounded through the emitter of a transistor and including feedback from the output of the circuit to the base of the transistor to create oscillations and to allow a digital input pulse of a desired length to control the start and stop of oscillations created by the transistor. | 11-04-2010 |
20100289591 | SYSTEM AND METHOD FOR EFFICIENTLY GENERATING AN OSCILLATING SIGNAL - An apparatus for generating an oscillating signal including an oscillator configured to generate the oscillating signal, a controller configured to generate a control signal that controls a characteristic (e.g., amplitude or frequency) of the oscillating signal, and a power supply configured to supply power to the oscillator as a function of the control signal. The power supply may be configured to supply power to the oscillator as a function of the amplitude or frequency of the oscillating signal to improve power efficiency. | 11-18-2010 |
20100327985 | Oscillator Circuit and Method for Generating a Clock Signal - An oscillator circuit comprises a charging block ( | 12-30-2010 |
20110001570 | Oscillation Circuit - An oscillation circuit includes a piezoelectric oscillator, a resistive element, and an exciting circuit connected between an input node and an output node in parallel with one another, a first capacitor connected between the input node and a ground node, and a second capacitor connected between the output node and the ground node. The exciting circuit includes a NAND circuit and first and second inverters that are cascade-connected. Oscillation of the piezoelectric oscillator is started when an enable signal input to the NAND circuit is switched to an H level. | 01-06-2011 |
20110006852 | PLL CIRCUIT AND SEMICONDUCTOR DEVICE HAVING THE SAME - A PLL circuit includes a phase detector, a loop filter (LF), a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares a phase of a signal Fs which is input from outside with a phase of a signal Fo/N which is input from the frequency divider. The loop filter generates a signal Vin by removing alternating current components from a signal input from the phase detector. The voltage-controlled oscillator outputs a signal Fo based on the signal Vin input from the loop filter. The frequency divider converts the signal Fo output from the voltage-controlled oscillator into Fo/N (frequency division by N), and outputs it to the phase detector. | 01-13-2011 |
20110018642 | Differential varactor circuit for a voltage controlled oscillator - According to one exemplary embodiment, a differential varactor circuit for a voltage controlled oscillator having two differential outputs includes a first varactor having first and second terminals and a second varactor having first and second terminals. In the differential varactor circuit, each of the first and second terminals of the first varactor and each of the first and second terminals of the second varactor are coupled to one of the two differential outputs of the voltage controlled oscillator, thereby allowing a size of each of the first and second varactors to be reduced so as to increase varactor quality factor. Each of the first and second terminals of the first varactor can be coupled to one of the two differential outputs by a capacitor, and each of the first and second terminals of the second varactor can be coupled to one of the two differential outputs by a capacitor. | 01-27-2011 |
20110018643 | VOLTAGE CONTROLLED OSCILLATOR WITH MICROSTRIP LINE SUITABLE FOR COARSE ADJUSTMENT OF OSCILLATION FREQUENCY BAND - A voltage controlled oscillator with a microstrip line suitable for coarse adjustment of an oscillation frequency band, the voltage controlled oscillator includes a transistor for oscillation that outputs an oscillation signal; a microstrip line formed on a substrate together with the transistor for oscillation, having one end connected to the transistor for oscillation and the other end connected to a ground electrode formed on the substrate, and thus constituting a part of a frequency determining element that determines a frequency of the oscillation signal according to a line length from the one end of the microstrip line to the ground electrode; and a conductor for coarse adjustment that connects between the one end and the other end of the microstrip line to the ground electrode, thereby reducing the line length of the microstrip line in the connection state. | 01-27-2011 |
20110018644 | OSCILLATOR - Provided is a transformer-based oscillator which is suited to oscillate frequencies in multiple bands. An oscillator includes a transformer resonance unit and a plurality of complementary transistors. The transformer resonance unit includes a primary coil and a secondary coil corresponding to the primary coil. The plurality of complementary transistors have gates and drains between which both ends of the transformer resonance unit are respectively connected. Thus, the oscillator may operate in a differential mode or common mode according to the phase of the transformer resonance unit. Also, a complementary transistor constituting a multiband oscillation loop may be independently connected to both ends of the transformer resonance unit, and an oscillation loop of at least one band may be selected out of a multiband oscillation loop using a switch unit. Thus, the oscillator may be suited to oscillate resonance frequencies in multiple bands. | 01-27-2011 |
20110095832 | Fast start, low power oscillator system - A fast start, low power oscillator system includes an oscillator circuit including an amplifier and a tank circuit, the amplifier including an operating resistance which sets the amplifier operating current and a speed-up circuit including a switching circuit for temporarily increasing the operating current to an elevated level at start-up and then returning it to the original operating current when the oscillator reaches its operating amplitude. | 04-28-2011 |
20110133845 | OSCILLATOR CIRCUIT - The present invention provides an oscillator circuit that can decrease consumed current. Namely, a second PMOS transistor is provided between a first PMOS transistor in which a constant current flows and an NMOS transistor for amplifying an oscillating signal, in order to interrupt the constant current flowing in the first PMOS transistor MP | 06-09-2011 |
20110175685 | MULTI-PRIMARY DISTRIBUTED ACTIVE TRANSFORMER AMPLIFIER POWER SUPPLY AND CONTROL - An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding. | 07-21-2011 |
20110193641 | LOW NOISE OSCILLATORS - An oscillator having: (A) a transistor for producing an oscillating output signal at an output electrode of the transistor. The oscillator includes; (B) a bias circuit for producing a bias signal for the transistor, said bias circuit including an amplifier coupled to the output electrode of the transistor; and (C) a circuit coupled between an output of the amplifier and a control electrode of the transistor, for isolating the bias signal provided by the amplifier from the oscillating signal. | 08-11-2011 |
20110267147 | OSCILLATOR CIRCUIT - An oscillator circuit comprises a push-push oscillator and a differential output, comprising a first and a second output circuit. The push-push oscillator has a first and a second branch. Each of the first and second branch comprises an own voltage divider branch of a common bridge circuit. Each of the first and second voltage divider branches comprises an own pair of micro-strip lines connected in series. Each of the first and second voltage divider branches has an own tap. Both taps are connected to each other by at least one of a first capacity and a micro-strip line. The differential output comprises a first and a second output terminal. The first output terminal is connected via the first output circuit to a first node. The second output terminal is connected via the second output circuit to a second node. Each of the first and second nodes of the push-push oscillator is a common node of both of the first and the second branches. | 11-03-2011 |
20110298550 | Ultra low power oscillator - A frequency generator is provided which is embodied in an integrated circuit manufactured at a process node below 100 nm. The frequency generator comprises a current starved oscillator configured to generate an output frequency signal in dependence on a voltage of a bias signal and a self-biased current generator configured to generate the bias signal, wherein the self-biased current generator comprises a first transistor and a second transistor connected in series. The bias signal is taken from a midpoint between the first transistor and the second transistor, and respective gates of the first and second transistors are connected to keep said first and second transistors in a cut-off state. Accordingly the self-biased current generator operates in a deep sub-threshold state and a current of said bias signal is dependent on a leakage current in the first and second transistors. | 12-08-2011 |
20120019330 | MULTI-SCREW CHAOTIC OSCILLATOR CIRCUIT - There is provided a multi-screw chaotic oscillator circuit with simple configuration, that can use various multi-hysteresis VCCS characteristics and generate a variety of multi-screw attractors. The multi-screw chaotic oscillator circuit comprises: a linear two-port VCCS circuit | 01-26-2012 |
20120038428 | Oscillators and method of operating the same - Oscillators and a method of operating the same are provided, the oscillators include at least one oscillation device including a first magnetic layer having a magnetization direction that is variable, a second magnetic layer having a pinned magnetization direction, and a non-magnetic layer disposed between the first magnetic layer and the second magnetic layer. The oscillation device is configured to generate a signal having a set frequency. The oscillators further include a driving transistor having a drain connected to the at least one oscillation device, and a gate to which a control signal for controlling driving of the oscillation device is applied. | 02-16-2012 |
20120223782 | COMPLEX NEGATIVE FEEDBACK FREQUENCY SELECTION OUTPUT CIRCUIT AND OSCILLATION CIRCUIT USING THE SAME - It is an object to provide a complex negative feedback frequency selection output circuit that can produce an output signal of a high resonance sharpness Q factor and an oscillation circuit using the same. The complex negative feedback frequency selection output circuit according to the present invention, frequency-selectively relays only the residual components of one of a signal in phase with (or a signal opposite in phase to) a feedback processed signal obtained by negative feeding back a feedback signal to an input frequency signal, with a rejected frequency band being left out, while relaying at least a real number component of the other, and comprises a feedback path which relays a difference signal between (or a sum signal of) the selectively relayed output and the relayed output of the real number component, as the feedback signal. The gain of a loop including this feedback path is variable and can be set manually or automatically. | 09-06-2012 |
20120286887 | PHASE LOCKED LOOP CIRCUIT HAVING A VOLTAGE CONTROLLED OSCILLATOR WITH IMPROVED BANDWIDTH - A voltage controlled oscillator includes a plurality of serially connected composite gain stages. A composite gain stage includes a transconductance stage and a transimpedance stage. The transconductance stage has first and second current paths from a first power supply voltage terminal to a second power supply voltage terminal. A first variable resistance is coupled between the first and second current paths. The transimpedance stage has a first inverter and a second inverter. The first inverter has an input terminal coupled to the output of the first current path and an output terminal. The second inverter has an input terminal coupled to the output of the second current path, and an output terminal. A second variable resistance is coupled between the input terminal and the output terminal of the first inverter, and a third variable resistance is coupled between the input terminal and the output terminal of the second inverter. | 11-15-2012 |
20120293271 | Voltage tunable oscillator using bilayer graphene and a lead zirconate titanate capacitor - A voltage controlled oscillator comprising a substrate and a bilayer graphene transistor formed on the substrate. The transistor has two signal terminals and a gate terminal positioned in between the signal terminals. A voltage controlled PZT or MEMS capacitor is also formed on the substrate. The capacitor is electrically connected to the transistor gate terminal. At least one component is connected to the transistor and capacitor to form a resonant circuit. | 11-22-2012 |
20120293272 | Methods And Systems For Generating Millimeter-Wave Oscillations - The various embodiments of the present invention provide improved methods and circuits for generating millimeter-wave oscillations. Generating millimeter-wave oscillations may involve providing a semiconductor device comprising at least two terminals and a polar heterojunction formed from two semiconductor materials. A voltage bias may be applied to at least two terminals of the device in which the voltage enhances a two-dimensional electron gas (2DEG) layer at the polar heterojunction and produces a sharply-peaked but spatially-localized electric field within the 2DEG with a large longitudinal component, wherein the longitudinal component of the electric field serves as a nucleation site for a plurality of propagating dipole domains observable as a plurality of self-sustaining millimeter-wave oscillations. | 11-22-2012 |
20120313718 | OSCILLATION CIRCUIT - A disclosed oscillation circuit includes a constant-voltage generation circuit, an oscillation generation circuit configured to generate an oscillation output, an output circuit including a plurality of parallelly arranged MOSFET circuits, to which a constant voltage generated by the constant-voltage generation circuit is supplied as a supply voltage, output points of the plurality of MOSFET circuits being mutually connected, and a drive circuit configured to drive a selected MOSFET circuit selected in response to a selection input among the plurality of MOSFET circuits by the oscillation output, wherein an output from an unselected MOSFET circuit among the plurality of MOSFET circuits other than the selected MOSFET circuits has a high impedance. | 12-13-2012 |
20120326796 | OSCILLATOR CIRCUT AND ELECTRONIC CIRCUIT COMPRISING THE OSCILLATOR CIRCUIT - An oscillator circuit including a first capacitor provided with a first terminal; a resistor provided with a reference terminal; a first current generator provided with a connection terminal; a second current generator provided with a second connection terminal. Further, the circuit includes a switching matrix between the first and second generators and resistor and the at least one first capacitor. | 12-27-2012 |
20130021108 | OSCILLATOR APPARATUS AND METHOD WITH WIDE ADJUSTABLE FREQUENCY RANGE - An oscillator formed from low cost discrete semiconductors and passive devices creates a linear periodic ramp of constant frequency with ramp slope based on an external voltage signal. Parameters are stable over a wide range of temperatures and variations of transistor parameters that normally degrade in extreme environments. The oscillator period can be phase and frequency synchronized to an external clock source over a wide range of frequencies. The oscillator ramp generator phase can be synchronized on a cycle by cycle basis for incorporation in power converters employing spread spectral EMI reduction techniques, multi-converter systems employing clock interleaving for distribution bus filter optimization, and resonant mode converters employing zero voltage switching techniques. Oscillator ramp rate is independent of frequency and can be synchronized to DC (inhibit) for use in ultra low power burst mode power conversion. | 01-24-2013 |
20130043957 | LOW DISTORTION IMPEDANCE SELECTION AND TUNABLE IMPEDANCE CIRCUITS - A tunable impedance circuit can include a fixed impedance and one or more impedance selection circuits. Each impedance selection circuit can include a first impedance connected to a first interface terminal, a second impedance connected to a second interface terminal, and a plurality of series-connected transistors connected between the first and second impedances. Each impedance selection circuit can also include a plurality of drive impedance networks connected to gates, sources, drains, bodies, and isolation regions of the series-connected transistors, and a control circuit to provide a plurality of control signals to the drive impedance networks to turn on and turn off the series-connected transistors. For each impedance selection circuit, turning on and turning off the respective plurality of series-connected transistors can bring the series combination of the respective first and second impedances into and out of electrical communication with, e.g., into and out of parallel with, the fixed impedance. | 02-21-2013 |
20130082788 | LOW NOISE OSCILLATOR HAVING PASSIVE IMPEDANCE NETWORK - Apparatus and methods are disclosed related to an oscillator that includes a sustaining amplifier. One such apparatus includes a resonant circuit configured to operate at a resonant frequency, a sustaining amplifier, and a passive impedance network. The resonant circuit can have a first terminal and a second terminal. The sustaining amplifier can include at least a first switch configured to drive the first terminal of the resonant circuit in response to an input at a first control terminal of the first switch. The passive impedance network can be configured to pass a bias to the first control terminal, such as a gate of a field effect transistor, of the first switch. The passive impedance network can be electrically coupled to the second terminal of the resonant circuit and can include at least one inductor. | 04-04-2013 |
20130106525 | SINGLE-STAGED BALANCED-OUTPUT INDUCTOR-FREE OSCILLATOR AND METHOD THEREOF | 05-02-2013 |
20130113574 | OSCILLATING DEVICE - The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits. | 05-09-2013 |
20130285755 | SYSTEM AND METHOD FOR SUPPORTING DIFFERENT TYPES OF OSCILLATOR CIRCUITS - In accordance with some embodiments of the present disclosure, an oscillator circuit comprises, a first pad associated with a first terminal of an oscillator and a second pad associated with a second terminal of the oscillator. The oscillator is configured to generate an oscillating signal and communicate the oscillating signal from the second terminal to a clock distributor coupled to the second pad. The oscillator circuit further comprises an oscillator gain element comprising an output node coupled to the first pad and an input node coupled to the second pad. The oscillator circuit also comprises a digital-to-analog converter (DAC) coupled to the first pad. The oscillator circuit additionally comprises a switching circuit coupled to the gain element. The switching circuit is configured to enable the gain element when the oscillator comprises a resonator and disable the gain element when the oscillator comprises a voltage controlled oscillating module. | 10-31-2013 |
20140055205 | OSCILLATOR FOR A POWDER SPRAY COATING DEVICE - An oscillator ( | 02-27-2014 |
20140139295 | LOW POWER VOLTAGE CONTROLLED OSCILLATOR - An enhanced negative resistance voltage controlled oscillator (VCO) is provided, in which the body of each transistor within a pair of cross-coupled transistors is coupled to the gate of the same transistor through a resistor. The body transconductance is employed to enhance the negative resistance of the cross-coupled pair of transistors. At the same time, a forward body bias voltage reduces the threshold voltage of the cross-coupled pair to allow the VCO to operate at a low power supply voltage. Further, the resistor connected between the body and the drain of each transistor voids the leakage in the substrate, and thus, reduces power consumption of the VCO further. This VCO provides low power operation with enhanced figure of merit without employing any extra inductors besides the inductors that are part of the LC tank. | 05-22-2014 |
20140203880 | BIAS CURRENT CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - A bias current circuit controls an oscillator that generates an oscillation signal of a frequency corresponding to an input current. The circuit includes a part that detects fluctuation of a control current for variably controlling the frequency of the oscillation signal and a part that generates an input current in which a fluctuation component of the control current is canceled using a current for cancelling the detected fluctuation of the control current. | 07-24-2014 |
20160006393 | OSCILLATOR AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - An oscillator includes a flip-flop that outputs a first signal having a phase that is inverted according to a comparison signal, a comparison circuit that compares an amplification voltage with a first reference voltage and outputs the comparison signal, a current source having an output voltage that is fixed to a second reference voltage, and an amplification circuit that generates the amplification voltage according to a current outputted from the current source and the second reference voltage. | 01-07-2016 |
20160028347 | OSCILLATOR CIRCUIT AND SEMICONDUCTOR DEVICE INCLUDING THE SAME - Controllability of an oscillator circuit is improved. The oscillator circuit has inverters in odd-numbered stages. A circuit is electrically connected to a power supply node of the inverters to which a high power supply potential is input. The circuit includes a first transistor, a second transistor, and a capacitor. The first transistor includes an oxide semiconductor in its channel. A holding circuit including the first transistor and the capacitor has a function of holding an analog potential that is input from the outside. The potential held by the holding circuit is input to a gate of the second transistor. A power supply potential is supplied to the inverters through the second transistor, so that the delay time of the inverter can be controlled by the potential of the gate of the second transistor. | 01-28-2016 |
20160048152 | CURRENT MIRROR WITH DEPLETION MODE MOS AND EMBEDDED NOISE FILTER - A current mirror with depletion mode MOS devices, and an embedded noise filter, operable with low supply voltage to provide a low-noise mirror current. The current mirror includes depletion-mode MOS transistors M | 02-18-2016 |
20160065130 | OSCILLATOR WITH DIFFERENTIAL STRUCTURE - An oscillator with a differential structure which is formed in an integrated circuit, including: a first transistor and a second transistor in each of which a drain electrode, a gate electrode, and a source electrode are sequentially arranged, a drain of the first transistor is connected with a gate of the second transistor through a first wiring, a drain of the second transistor is connected with a gate of the first transistor through a second wiring, and a first end of a source of the first transistor and a first end of a source of the second transistor are connected through a third wiring, and a second end of the source of the first transistor and a second end of the source of the second transistor are connected through a fourth wiring. | 03-03-2016 |
20160065186 | ADJUSTING THE MAGNITUDE OF A CAPACITANCE OF A DIGITALLY CONTROLLED CIRCUIT - An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | 03-03-2016 |
20160105148 | RC OSCILLATOR - A method includes using a current source to provide a charging current to a capacitor of a resistor-capacitor (RC) tank of an RC oscillator. The method includes using a resistor of the current source as a resistor for the RC tank. | 04-14-2016 |
20160126888 | SEMICONDUCTOR DEVICE - An object of the present invention is to provide a semiconductor device including an oscillator circuit including a circuit between inverters. In the circuit, a sum of the length (a | 05-05-2016 |
20160204740 | System and Method for a Voltage Controlled Oscillator | 07-14-2016 |
20090102571 | CASCODE AMPLIFIER AND DIFFERENTIAL CASCODE VOLTAGE-CONTROLLED OSCILLATOR USING THE SAME - Provided is a differential cascode voltage-controlled oscillator that can reduce a phase noise by the use of a quality factor enhancement technique with negative conductance and can mitigate a ground-caused noise effect by the use of a cascode connection technique. The differential cascode voltage-controlled oscillator includes an AC signal generator, and first through fourth cascode amplifiers. The AC signal generator generates an AC signal with a certain frequency according to a control voltage. The first cascode amplifier is connected in a cascode configuration, and amplifies the AC signal to output the resulting signal to a first output terminal. The second cascode amplifier is connected in a cascode configuration and connected to the first cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to a second output terminal. The third cascode amplifier is connected in a cascode configuration to amplify the AC signal to output the resulting signal to the first output terminal. The fourth cascode amplifier is connected in a cascode configuration and connected to the third cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to the second output terminal. Herein, the first and second cascode amplifiers and the third and fourth cascode amplifiers are symmetrically connected to differentially amplify the AC signal. | 04-23-2009 |
20090115539 | INTEGRATED RC OSCILLATOR WITH HIGH FREQUENCY STABILITY, NOTABLY FOR AN INTEGRATED SWITCHED-MODE POWER SUPPLY - An integrated oscillator ( | 05-07-2009 |
20090315630 | CMOS POWER OSCILLATOR WITH FREQUENCY MODULATION - CMOS power oscillator and a method of frequency modulating a CMOS power oscillator. The oscillator comprises a transformer-based feedback CMOS power oscillator circuit formed on a chip-substrate, the oscillator circuit including a transformer coupled to a transistor; means for modulating the capacitance of the transformer to the chip-substrate for frequency modulating an output of the power oscillator. | 12-24-2009 |
20100219895 | TRANSISTOR-BASED MICROMETRIC OR NANOMETRIC RESONANT DEVICE - The resonant device comprises an electromechanical resonator of nanometric or micrometric size that comprises a mobile element and a fixed element. Detection means provide detection signals representative of movement of the mobile element with respect to the fixed element to a feedback loop that is connected to an excitation input of the resonator. The resonator is formed on the same substrate as the detection means and feedback loop. The feedback loop comprises at most first and second transistors connected in series between a reference voltage and the excitation terminal. A capacitive load is connected between the excitation terminal and reference voltage. The detection signals control the conductivity of the first transistor. | 09-02-2010 |
20110084770 | Oscillator - An oscillator is provided. The oscillator comprises a flip-flop module, a first and a second setting module. The first setting module comprises: a first switch device to generates a first switch signal according to a first oscillating signal, an NMOS and an inverter. The NMOS comprises a drain to receive a first charging current and a gate to receive the first switch signal, wherein the drain is charged or discharged according to the first switch signal. The inverter is connected to the drain to generate a first setting signal. The second setting module comprises a second switch device to generate a second switch signal according to a second oscillating signal and a comparator to generate a second setting signal according to the second switch signal and a reference voltage. The flip-flop module generates the first and the second oscillating signal according to the first and the second setting signal. | 04-14-2011 |
20110102092 | SEMICONDUCTOR INTEGRATED CIRCUIT - A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is detected is provided. The semiconductor integrated circuit includes one or more main oscillation circuits configured to generate a main clock signal by a vibrator, a ring oscillator configured to always operate independently of the main oscillation circuit, a main clock detection circuit configured to monitor the main clock signal on the basis of an output clock signal of the ring oscillator and to determine an operation state of the main oscillation circuit, and an switch circuit configured to switch a combination of elements making up the main oscillation circuit in response to a detection result of the main clock detection circuit. | 05-05-2011 |
20110163820 | VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, PHASE-LOCKED LOOP CIRCUIT USING THE VOLTAGE CONTROLLED OSCILLATOR CIRCUIT, AND SEMICONDUCTOR DEVICE PROVIDED WITH THE SAME - A VCO circuit includes: a control portion to which a first voltage is inputted and from which a second voltage corresponding to the first voltage is outputted; a current source portion to which the second voltage is inputted and from which a current corresponding to the second voltage is outputted; and an oscillator circuit to which the current is inputted and from which a signal with a frequency in accordance with the current is outputted. The control portion includes an adjusting circuit which changes the second voltage in conjunction with fluctuation of a power supply voltage. Accordingly, fluctuation of the frequency Fo of an output signal of the VCO circuit can be suppressed even when the power supply voltage of the VCO circuit fluctuates. | 07-07-2011 |
20120075029 | SEMICONDUCTOR DEVICE - There is provided a semiconductor device having resistance elements small in temperature dependence of the resistance value. The semiconductor device has metal resistance element layers. The metal resistance element layer includes a resistance film layer. The other metal resistance element layer includes another metal resistance film layer. The metal resistance film layer is one of titanium nitride resistance and tantalum nitride resistance. The other metal resistance film layer is the other of the titanium nitride resistance and the tantalum nitride resistance. The resistance value of titanium nitride resistance has a positive temperature coefficient. Whereas, the resistance value of tantalum nitride resistance has a negative temperature coefficient. A contact plug electrically couples the metal resistance film layer with the other metal resistance film layer. Therefore, the temperature coefficient of the titanium nitride resistance and the temperature coefficient of the tantalum nitride resistance cancel each other. This can reduce the temperature coefficient. | 03-29-2012 |
20120206210 | CIRCUITRY AND METHOD FOR PRECISION AMPLITUDE CONTROL IN QUARTZ AND MEMS OSCILLATORS - An oscillator includes oscillator circuitry ( | 08-16-2012 |
20130057353 | LOW CURRENT SINGLE CHIP OSCILLATOR TIMING CIRCUIT - A low current single chip oscillator timing circuit which includes a dual mode capacitor circuit having a larger capacitance mode and a smaller capacitance mode having a fixed ratio. The timing circuit also includes an oscillator circuit that uses the dual mode capacitor circuit as a part of its time base wherein the large capacitance mode is operated with low power consumption and as needed includes a circuit that generates a reference pulse, wherein the short pulse and the reference pulse are compared and the result is used for correction to the oscillator frequency to create a feedback loop. | 03-07-2013 |
20140184345 | CIRCUIT AND METHOD FOR GENERATING OSCILLATING SIGNALS - An oscillator module includes a first MOS transistor and a capacitor. The capacitor is coupled between a gate and source of the first MOS transistor. The drain of the first MOS transistor receives a first bias current and generates an oscillating output signal. A switching circuit operates in response to the oscillating output signal to selective charge and discharge the capacitor. A current sourcing circuit is configured to generate the bias current. The current sourcing circuit includes a second MOS transistor which has an identical layout to the first MOS transistor and receives a second bias current. A resistor is coupled between a gate and source of the second MOS transistor. The current sourcing circuit further includes a current mirror having an input configured to receive a reference current passing through the resistor and generate the first and second bias currents. | 07-03-2014 |
20140292429 | MULTIGATE RESONANT CHANNEL TRANSISTOR - An embodiment includes an oscillator comprising an amplifier formed on a substrate; a multiple gate resonant channel array, formed on the substrate, including: (a) transistors including fins, each of the fins having a channel between source and drain nodes, coupled to common source and drain contacts; and (b) common first and second tri-gates coupled to each of the fins and located between the source and drain contacts; wherein the fins mechanically resonate at a first frequency when one of the first and second tri-gates is periodically activated to produce periodic downward forces on the fins. Other embodiments include a non planar transistor with a channel between the source and drain nodes and a tri-gate on the fin; wherein the fin mechanically resonates when the first tri-gate is periodically activated to produce periodic downward forces on the fin. Other embodiments are described herein. | 10-02-2014 |
20140327486 | RC Oscillator - In an electronic device, an RC oscillator generally includes a resistor, a capacitor and at least one inverter. The resistor and capacitor generate a time-varying voltage. The time-varying voltage is provided to the at least one inverter to cause a clock signal to propagate therethrough. The clock signal propagates with a time delay that is at least partially dependent on a supply voltage. The supply voltage is adjusted to maintain the time delay at almost a constant value. | 11-06-2014 |
20150008987 | CLOCK GENERATION CIRCUIT THAT TRACKS CRITICAL PATH ACROSS PROCESS, VOLTAGE AND TEMPERATURE VARIATION - Clock generation circuit that track critical path across process, voltage and temperature variation. In accordance with a first embodiment of the present invention, an integrated circuit device includes an oscillator electronic circuit on the integrated circuit device configured to produce an oscillating signal and a receiving electronic circuit configured to use the oscillating signal as a system clock. The oscillating signal tracks a frequency-voltage characteristic of the receiving electronic circuit across process, voltage and temperature variations. The oscillating signal may be independent of any off-chip oscillating reference signal. | 01-08-2015 |
20150116047 | SEMICONDUCTOR DEVICE - Disclosed is a semiconductor device. The semiconductor device includes a functional circuit having a resistor formed by a plurality of polysilicon resistors, and in which the property of the functional circuit can be adjusted by trimming the resistor, and in which the polysilicon resistors are coupled in series or in parallel to each other and arranged in a direction perpendicular to one side of the semiconductor device. | 04-30-2015 |
20160065131 | INTEGRATED CIRCUIT COMPRISING A FREQUENCY DEPENDENT CIRCUIT, WIRELESS DEVICE AND METHOD OF ADJUSTING A FREQUENCY - An integrated circuit comprises a frequency dependent circuit comprising an input node, an output node and a main bank of selectable first capacitive elements that affect a frequency characteristic of the frequency dependent circuit. The frequency dependent circuit further comprises at least one shunt bank of selectable second capacitive elements located between ground and one of the input node or the output node, wherein at least one selectable second capacitive element switched out of the frequency dependent circuit is based on a number of the selectable first capacitive elements that are switched into the frequency dependent circuit. | 03-03-2016 |
20160112005 | METHOD AND APPARATUS FOR AN INTEGRATED PN-JUNCTION OSCILLATOR - An integrated oscillator circuit has a plurality oscillator stages including a first oscillator stage, an odd number of intermediate oscillator stages, and a last oscillator stage arranged in series. Each of the oscillator stages has a reverse-biased diode device and a transistor coupled in series between a power supply and a ground. Each diode device has an anode and a cathode, and each transistor has a control terminal for controlling a current flow from a first terminal to a second terminal. In each oscillator stage, the anode of the diode is coupled to the first terminal of the transistor at an internal node. The control terminal of the transistor in each oscillator stage is coupled to the internal node of a proceeding oscillator stage. Further, the control terminal of the transistor in the first oscillator stage is coupled to the internal node of the last oscillator stage. | 04-21-2016 |
20160134236 | Method And System For Frequency Generation - Methods and systems for frequency generation may comprise a circuit with a first input coupled to receive a first satellite signal at a first satellite downlink frequency, a second input coupled to receive a second satellite signal at a second satellite downlink frequency, and a first analog-to-digital converter (ADC) having an input coupled to receive the first satellite signal and an output. The first ADC may be configured to create a first digital output signal representing the first satellite signal. A second ADC having an input coupled to receive the second satellite signal and an output may be configured to create a second digital output representing the second satellite signal. The circuit may comprise a dielectric resonator oscillator having an output and a clock generator circuit having an input coupled to the oscillator output and configured to output one or more clocks used by the first and second ADCs. | 05-12-2016 |
20100176891 | SINGLE-PIN RC OSCILLATOR - Apparatus includes a single-pin input interface, which is operative to sense a voltage across a capacitor of a Resistor-Capacitor (RC) network in which the capacitor is repetitively charging and discharging so that the voltage oscillates as a function of time. A measurement circuit is coupled to measure time durations in which the capacitor is charging and in which the sensed voltage lies between first and second predefined thresholds. A clock generation circuit is coupled to generate an output clock signal having a frequency, and to adjust the frequency responsively to the measured time durations. | 07-15-2010 |
20110285469 | METHOD AND APPARATUS FOR DETERMINING WITHIN-DIE AND ACROSS-DIE VARIATION OF ANALOG CIRCUITS - Described herein is the method and apparatus for determining frequency of an oscillator coupled with one or more analog devices, and for determining within-die or across-die variations in an analog property associated with the one or more analog devices, the determining based on the oscillator frequency. The analog property includes output signal swing, bandwidth, offset, gain, and delay line linearity and range. The one or more analog devices include input-output (I/O) buffer, analog amplifier, and delay line. The method further comprises updating a simulation model file based on the determining of the within-die and/or across-die variations of the analog property. | 11-24-2011 |
20120223781 | NOISE REGULATED LINEAR VOLTAGE CONTROLLED OSCILLATOR - Described embodiments provide a voltage controlled oscillator (VCO) that includes an operational amplifier (opamp). The opamp has a positive power supply input coupled to a power supply voltage, a negative power supply input coupled to a ground node, an inverting input coupled to a control voltage of the VCO, a noninverting input that receives a feedback signal, and an output providing a transistor control voltage. A transistor having a gate terminal coupled to the output of the opamp, a source terminal coupled to the power supply voltage, and a drain terminal coupled to a resistor coupled to ground, generates an output current. A current mirror generates a mirror current based on the output current. A current controlled oscillator (ICO) is coupled to the current mirror, and sets the frequency of the VCO output signal based upon the mirror current. | 09-06-2012 |
20110163819 | VARIABLE PHASE AMPLIFIER CIRCUIT AND METHOD OF USE - A variable phase amplifier circuit is disclosed and its method of use in tuning devices having resonators. The variable phase amplifier receives an input differential signal pair. The input differential signal pair can be generated by a resonator device. The variable phase amplifier generates a modified differential signal pair in response to receiving the input differential signal pair. The variable phase amplifier provides a means to vary the phase of the modified differential signal pair with respect to the input differential signal pair, in an accurate and stable manner. If the modified differential signal pair with a phase shift introduced in it is fed back to the resonator device, the resonator will change its frequency of oscillation, where the new frequency of oscillation is a function of the phase of the modified differential signal pair. | 07-07-2011 |
20120154065 | OSCILLATING CIRCUIT WITH GIANT MAGNETORESISTANCE EFFECT JUNCTIONS - An oscillator including two groups of elementary junctions having giant magnetoresistance effect traversed by electric currents, the junctions of each of the two groups being in series and energized by respective main currents and the voltages across the terminals of the groups being added together to provide a voltage on an output of the oscillating circuit. The voltage across the terminals of one or more junctions of a first group is applied to a first input of a phase comparator and the voltage across the terminals of one or more junctions of the other group is applied to another input of the phase comparator, the phase comparator providing on two outputs secondary currents of the same amplitude and of opposite signs, which are dependent on the mean phase difference between the voltages applied to the inputs, the secondary currents each being added to a respective main current. | 06-21-2012 |
20130009713 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, which comprise a resistance and a capacitance. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitance. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20130009714 | RESISTANCE-CAPACITANCE OSCILLATION CIRCUIT - A resistance-capacitance oscillation circuit comprises an amplifier and a phase shifting circuit. The phase shifting circuit comprises at least three resistance-capacitance circuit elements, each of which comprises a resistance and a capacitor. At least one of the resistance-capacitance circuit elements comprises a variable resistance and a variable capacitor. The variable resistance is formed of a first electrode, a second electrode, a part of a semiconductor film, a part of a ferroelectric film, and a fourth electrode. The variable capacitor is formed of the second electrode, a third electrode, a fifth electrode, another part of the ferroelectric film, another part of the semiconductor film, and a paraelectric film. | 01-10-2013 |
20080231382 | Split-blased interpolated voltage-controlled oscillator and phase locked loop - A voltage-controlled oscillator (VCO) of ring-connected stages, where each stage in the VCO has a first set of differential inverters biased by variable bias voltages, and a second set of differential inverters biased by fixed bias voltages. The differential inverters in each stage are connected in parallel with each other. Each set of differential inverters in a stage may contain only one differential inverter. The variable bias voltages are provided by charge pumps and associated circuits as used in well-known self-biasing schemes for phase locked loops. The fixed bias voltages are provided by a biasing circuit, matched to the circuits associated with the charge pumps, but where a fixed control voltage is applied to provide the fixed bias voltages. | 09-25-2008 |
20080266005 | Automatically Tuned Tail Filter - The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It further comprises a tunable filter arrangement connected to the source node of said voltage controlled oscillator (VCO) arrangement. Said filter arrangement particularly comprises an equivalent current source resonating at a second resonance frequency cθf, the second resonance frequency being a multiple n, n=1 or 2 of said first resonance frequency (α>o), n being equal to the minimum number of switch transistors required for oscillation of said VCO arrangement. The filter arrangement particularly comprises an inductor connected in parallel with a capacitor, said capacitor being adapted to be tunable such that the phase noise of the resonating arrangement can be minimized through tuning of the filter arrangement. | 10-30-2008 |
20090002084 | Oscillator - In an oscillator of the present invention, each of field-effect transistors ( | 01-01-2009 |
20100164637 | Oscillation circuit - A differential oscillation circuit according to the present invention is a differential oscillation circuit including a feedback loop circuit. The differential oscillation circuit includes: delay, circuits, cascade-connected one after another on the feedback loop circuit, each delay circuit configured to delay paired differential input signals which the delay circuit receives, and to output the delayed differential signals as paired differential output signals; and an oscillation activation detector circuit configured to detect whether the oscillation circuit is in an oscillation activation state or in a stable state, and to output a detection signal indicating a result of the detection. Furthermore, on the basis of the detection signal outputted from the oscillation activation detector circuit, each of the delay circuits controls output current values of the differential output signals. This circuit configuration enables the speeding up of the oscillation frequency of the circuit. | 07-01-2010 |
20100201454 | VDD-Independent Oscillator Insensitive to Process Variation - An oscillator includes a positive power supply node for providing a positive power supply voltage; a capacitor; and a constant current source providing a first constant current and coupled to the positive power supply node. The first constant current is independent from the positive power supply node. The oscillator also includes a charging current source configured to provide a second constant current to charge the capacitor, wherein the second constant current mirrors the first constant current. The oscillator further includes a constant current source inverter having a third constant current mirroring the first constant current. The constant current source inverter is configured to control the oscillator to transition state at a constant state transition voltage. | 08-12-2010 |
20110050353 | TEMPERATURE COMPENSATED RC OSCILLATOR FOR SIGNAL CONDITIONING ASIC USING SOURCE BULK VOLTAGE OF MOSFET - A temperature compensated CMOS RC oscillator circuit changes the source-bulk voltage to stabilize the MOSFET's threshold voltage variation over temperature using a resistor and temperature-correlated bias current. The MOSFET's source is connected to ground through a resistor. This temperature-correlated bias current also runs through this resistor. When temperature increases, the bias current also increases, which increases the MOSFET's source-bulk voltage. The increased source-bulk voltage helps to stabilize the threshold voltage of MOSFET at high temperature. A power saving logic is also embedded in this oscillator to achieve higher frequency at lower power consumption. In the present invention, there is no high gain op amp or high speed comparator, which makes the resultant oscillator to be low power design and which can be integrated into a single chip with other system. | 03-03-2011 |
20110095831 | PVT-INDEPENDENT CURRENT-CONTROLLED OSCILLATOR - The invention discloses a PVT-independent current-controlled oscillator, including a PV-controller, a current-controlled oscillator and a T-controller. The current-controlled oscillator is coupled to the PV-controller and outputs an oscillation frequency. The T-controller is coupled to the PV-controller and the current-controlled oscillator, providing a total current to be shared by the PV-controller and the current-controlled oscillator, wherein the PV-controller decreases the shared current of the current-controlled oscillator by increasing the shared current of the PV-controller if the oscillation frequency is higher than a predetermined frequency due to a process variation of the current-controlled oscillator, and increases the shared current of the current-controlled oscillator by decreasing the shared current of the PV-controller if the oscillation frequency is lower than the predetermined frequency due to the process variation of the current-controlled oscillator, thereby dynamically adjusting the oscillation frequency. | 04-28-2011 |
20110156825 | OSCILLATING APPARATUS - An oscillating apparatus includes: a transfer gate including a P-channel transistor and a N-channel transistor; a first inverter for inverting an output signal of the transfer gate and outputting the inverted output signal of the transfer gate; a second inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a third inverter for inverting the output signal of the first inverter and outputting the inverted output signal of the first inverter; a fourth inverter for inverting the output signal of the third inverter and outputting the inverted output signal of the third inverter to an input-terminal of the transfer gate; a first capacitor connected between an output-terminal of the transfer gate and an output-terminal of the second inverter; and a second capacitor connected between the output-terminal of the transfer gate and a reference potential node. | 06-30-2011 |
20130300511 | VOLTAGE CONTROLLED OSCILLATOR - A voltage controlled oscillator generating an oscillation signal according to a first control signal without a silent region. The voltage controlled oscillator includes a control signal adjuster and a plurality of delay cells. The control signal adjuster receives the first control signal and generates a second and a third control signal according to the first control signal. The voltage level of the third control signal is higher than that of the second control signal and the voltage level of the second control signal is higher than that of the first control signal. The plurality of delay cells are ring-connected and controlled by the first, the second, and the third control signals to generate the oscillation signal. Each delay cell includes three sets of current generation transistors. The three sets of current generation transistors are separately controlled by the three different control signals. | 11-14-2013 |
20160197582 | MEMORYLESS COMMON-MODE INSENSITIVE AND LOW PULLING VCO | 07-07-2016 |