Class / Patent application number | Description | Number of patent applications / Date published |
331177000 | WITH FREQUENCY ADJUSTING MEANS | 53 |
20080266012 | METHOD FOR CONTROLLING HIGH-FREQUENCY RADIATOR - A method for controlling a high-frequency radiator includes the steps of: (a) applying a high-frequency radiation through the solid-state oscillator and the antenna; (b) sensing part of the high-frequency radiation returned from the antenna to the solid-state oscillator; (c) adjusting radiation/propagation conditions for the high-frequency radiation on the basis of the sensed results in the step (b), the high-frequency radiation propagating from the solid-state oscillator to the antenna; and (d) after the step (c), applying the high-frequency radiation through the solid-state oscillator and the antenna to a target object. In the step (c), the oscillation frequency of the solid-state oscillator, the power of the high-frequency radiation applied by the solid-state oscillator, the power supply voltage supplied to the solid-state oscillator, the impedance match between the output impedance of the solid-state oscillator and the impedance of the antenna, or any other condition is changed. | 10-30-2008 |
20090051454 | Voltage controlled oscillator - According to one aspect of the present invention, there is provided a voltage controlled oscillator controlling frequency of an output signal according to input voltage, the voltage controlled oscillator including a current controlled oscillator setting the frequency of the output signal based on control current, and a voltage-current converter including a transistor controlling a current amount of the control current according to the input voltage, in which the voltage-current converter is supplied with control voltage, and threshold value voltage of the transistor is controlled according to the control voltage. | 02-26-2009 |
20090243740 | METHOD AND SYSTEM FOR REDUCED JITTER SIGNAL GENERATION - Aspects of a method and system for reduced jitter signal generation are provided. In this regard, an output frequency of an oscillator circuit may be controlled via a digital control word, wherein a least significant bit of the digital control word may control one or more variable capacitors and remaining bits of the digital control word may control one or more banks of fixed capacitors. The least significant bit may be filtered to generate a signal corresponding to an average voltage of the least significant bit. In this regard, the generated signal may be a voltage corresponding to the average voltage of the least significant bit and may control the variable capacitor. The digital control word may be representative of a phase difference between a reference signal and a feedback signal and may be generated via a digital multiplier. | 10-01-2009 |
20090284321 | Temperature and Process Independent Voltage Controlled Oscillator Circuit - Techniques for voltage controlled oscillator (VCO) circuits that are independent of temperature and process variations are described herein. | 11-19-2009 |
20100039184 | ELECTRONIC DEVICE FOR GENERATING A LOCAL OSCILLATOR SIGNAL HAVING A FREQUENCY EQUAL TO A FRACTIONAL PART OF A FUNDAMENTAL FREQUENCY - An electronic device (ED) is intended for generating a local oscillator signal having a chosen frequency F | 02-18-2010 |
20100085126 | OSCILLATION CIRCUIT INCLUDING MIT DEVICE AND METHOD OF ADJUSTING OSCILLATION FREQUENCY OF THE OSCILLATION CIRCUIT - Provided are an MIT device-based oscillation circuit including a power source, an MIT device and a variable resistor, in which a generation of an oscillation and an oscillation frequency are determined according to a voltage applied from the power source and a resistance of the variable resistor, and a method of adjusting the oscillation frequency of the oscillation circuit. The MIT device includes an MIT thin film and an electrode thin film connected to the MIT thin film, and generates a discontinuous MIT at an MIT generation voltage, the variable resistor is connected in series to the MIT device, and the power source applies a voltage or an electric current to the MIT device. The generation of an oscillation and an oscillation frequency are determined according to the voltage applied from the power source and the resistance of the variable resistor. | 04-08-2010 |
20100127788 | SELECTABLE LOCAL OSCILLATOR - A selectable local oscillator provides an output frequency signal having a selectable frequency within a desired output frequency range. The selectable local oscillator comprises first, second and third signal generators configured to provide first, second and third frequency signals having frequencies in first, second and third input frequency ranges. A first mixer provides a first mixed product signal having an upper sideband and a lower sideband. A frequency selector selects one of the upper and lower sidebands of the first mixed product signal. A second mixer provides a second mixed product signal having an upper sideband and a lower sideband. An output stage selects at least one of the upper and lower sidebands of the second mixed product signal as the output frequency signal. | 05-27-2010 |
20100237960 | FREQUENCY-JITTERING APPARATUSES, FREQUENCY-JITTERING METHODS AND POWER MANAGEMENT DEVICES - A frequency-jittering apparatuses includes an oscillator and a frequency control circuit. The oscillator generates a signal. When the magnitude of the signal exceeds a magnitude of a reference signal, the oscillator operates substantially in a first state; and when the magnitude of the signal is lower than the magnitude of the reference signal, the oscillator operates substantially in a second state different from the first one. The frequency control circuit varies the reference signal to change the frequency of the signal output from the oscillator. | 09-23-2010 |
20100289593 | CLOCK AND DATA RECOVERY CIRCUIT - An embodiment of the invention provides a clock and data recovery circuit. The clock and data recovery circuit comprises a phase detector, a pre-accumulator, a register, an accumulator and a digital controlled oscillator. By using the transmission path formed by the pre-accumulator, the output of the phase detector can be transmitted to the digital controlled oscillator in advance to adjust the frequency of its output clock signal and the latency due to the accumulator can be reduced. | 11-18-2010 |
20120176204 | OSCILLATOR CIRCUIT - An oscillator circuit includes a clock oscillator which outputs a main clock signal having an oscillating frequency switched between a high frequency and a low frequency in response to a frequency selection signal, and a frequency divider circuit which outputs a sub-clock signal having a divided frequency equivalent to a frequency division ratio of the oscillating frequency of the main clock signal, the frequency division ratio being switched in response to the frequency selection signal. The divided frequency of the sub-clock signal is predetermined for each of the high frequency and the low frequency to which the oscillating frequency is switched in response to the frequency selection signal. | 07-12-2012 |
20120249256 | CALIBRATION CIRCUIT OF A FREQUENCY GENERATOR, frequency generator, AND COMPENSATION CIRCUIT THEREOF - A calibration circuit includes at least two compensation circuits and a comparator. The at least two compensation circuits are coupled to an input signal for outputting at least a first compensation signal and a second compensation signal respectively. The comparator is coupled to the first compensation signal and the second compensation signal for outputting a calibration signal, where the calibration signal is used for determining an oscillation frequency of a crystal oscillator to achieve a purpose of frequency compensation with a temperature. | 10-04-2012 |
20120262245 | SIGNAL PROCESSING DEVICE AND METHOD FOR PROVIDING OSCILLATING SIGNAL IN THE SIGNAL PROCESSING DEVICE - A signal processing device includes a signal processing chip and a conducting path. The signal processing chip includes: a first port capable of receiving a first oscillating signal; a second port capable of outputting a second oscillating signal derived from the first oscillating signal; and a third port. The conducting path is external to the signal processing chip and coupled to the second port and the third port, and the conducting path is capable of transmitting the second oscillating signal outputted from the second port to the third port. | 10-18-2012 |
20130009718 | OSCILLATING SIGNAL GENERATING APPARATUS AND CONTROL SIGNAL GENERATOR OF THE OSCILLATING SIGNAL GENERATING APPARATUS - An oscillating signal generating device includes: an oscillating circuit arranged to generate an oscillating signal according to a current controlled signal; and a control signal generating circuit coupled to the oscillating circuit, the control signal generating circuit for receiving a first reference voltage and a second reference voltage, the control signal generating circuit operated between the first reference voltage and the second reference voltage, and the control signal generating circuit arranged to generate the current controlled signal according to a voltage input signal; wherein the control signal generating circuit is capable of monotonically generating the current controlled signal according to the voltage input signal when a voltage level of the voltage input signal falls between the first reference voltage and the second reference voltage. | 01-10-2013 |
20130027149 | METHOD AND CIRCUIT FOR INCREASING THE RESOLUTION OF A DIGITALLY CONTROLLED OSCILLATOR - A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency. | 01-31-2013 |
20130057356 | MAGNETORESISTIVE RADIOFREQUENCY OSCILLATOR AND METHOD FOR GENERATING AN OSCILLATING SIGNAL - The invention relates to a radio frequency oscillator which incorporates: a spin-polarized electric current magnetoresistive device ( | 03-07-2013 |
20130057357 | MAGNETORESISTIVE RADIOFREQUENCY OSCILLATOR AND METHOD FOR GENERATING AN OSCILLATING SIGNAL - The invention relates to a radiofrequency oscillator which incorporates: a spin-polarized electric current magnetoresistive device ( | 03-07-2013 |
20130285757 | CONTROL CIRCUIT FOR REDUCING ELECTROMAGNETIC INTERFERENCE - A control circuit for reducing electromagnetic interference is provided. The control circuit includes a periodic signal generator and a modulation controller. The periodic signal generator adjusts a modulation periodic signal generated by the periodic signal generator, according to a feedback modulation signal. The modulation controller is coupled to the periodic signal generator, for receiving the modulation periodic signal, and adjusting a frequency of the received modulation periodic signal according to a plurality of delay periods set according to a plurality of control signals, and generating the feedback modulation signal. | 10-31-2013 |
20140203884 | Numerically-Controlled Oscillator - Various techniques for generating an output clock based on a reference clock. This disclosure relates to generating an output clock signal based on a reference clock signal. In one embodiment, a method includes generating, using information received from a control circuit, an output clock signal using both a first number of edges or an input clock signal and a second, different number of edges of the input clock signal. In this embodiment, the control circuit runs at a frequency that is less than a frequency of the input clock signal. The received information may indicate, for a pulse of the output clock signal, whether the pulse should be generated using the first number of edges or the second number of edges. In some cases, the second number of edges may be the first number of edges plus one. The first and second number of edges may be programmable quantities. | 07-24-2014 |
20140306774 | DIGITALLY CONTROLLED OSCILLATOR AND OUTPUT FREQUENCY CONTROL METHOD - A digitally controlled oscillator that generates an output frequency according to input data includes a determination unit that determines whether the input data has a value that causes deterioration in a phase noise characteristic of the digitally controlled oscillator, an offset unit that offsets the input data when the input data is determined to have the value that causes deterioration in the phase noise characteristic, and a generating unit that generates the output frequency using the input data after being offset. | 10-16-2014 |
20150015342 | ON-CHIP OSCILLATING METHOD ABLE TO CALIBRATE FREQUENCY THEREOF AND ASSOCIATED APPARATUS - An on-chip oscillating method which is able to calibrate a frequency of an on-chip oscillator includes: utilizing the on-chip oscillator to generate a predetermined frequency output; receiving an external data input from an off-chip data source; generating a comparison result by comparing the predetermined frequency output with the external data input; and calibrating the predetermined frequency output by utilizing the comparison result. An on-chip oscillating apparatus which is able to calibrate its frequency includes: the on-chip oscillator, arranged to generate a predetermined frequency output; a receiving unit, arranged for receiving an external data input from an off-chip data source; and a comparison unit, arranged for generating a comparison result for calibrating the predetermined frequency output by comparing a predetermined frequency output with an external data input from an off-chip data source. | 01-15-2015 |
20160079962 | Electronic Device with Switched-Capacitor Tuning and Related Method - A device comprises a first capacitor block comprising a plurality of first capacitors connected in a first configuration, a second capacitor block comprising a plurality of second capacitors connected in the first configuration, a third capacitor block comprising a plurality of third capacitors connected in a second configuration, a fourth capacitor block comprising a plurality of fourth capacitors connected in the second configuration, a first switch connected between the first capacitor block and the second capacitor block, a second switch connected between the third capacitor block and the fourth capacitor block, a third switch connected between the first capacitor block and the fourth capacitor block and a fourth switch connected between the third capacitor block and the second capacitor block. | 03-17-2016 |
20160126889 | VOLTAGE-CONTROLLED OSCILLATOR WITH MASK-SELECTABLE PERFORMANCE - An apparatus having a substrate with an inductor, a first die and a second die is disclosed. The first die may be (i) mounted on the substrate, (ii) configured to vary a frequency of a signal in the inductor, and (iii) fabricated with multiple first masks. The second die may be (i) mounted on the substrate, (ii) configured to excite the signal, and (iii) fabricated with multiple second masks. A particular one of the first masks generally has several designs that customize the first die to several configurations respectively. A particular one of the second masks may have several designs that customize the second die to several configurations respectively. The first die, the second die and the inductor may form a voltage-controlled oscillator. A selected first design and a selected second design generally establish multiple performances of the voltage-controlled oscillator. | 05-05-2016 |
20160380641 | ELECTRONIC CIRCUIT - An electronic circuit includes an oscillator configured to generate an oscillating signal having a cycle responsive to an input signal, a voltage detector configured to produce a detection signal responsive to a power supply voltage, a frequency divider configured to generate a frequency-divided signal obtained by dividing a frequency of the oscillating signal by a frequency-division ratio responsive to the detection signal, and an adder configured to obtain a sum of a first signal and a second signal and to supply a signal responsive to the sum to the oscillator as the input signal, the first signal being responsive to a difference in phase between the frequency-divided signal and a reference signal, and the second signal being responsive to the detection signal. | 12-29-2016 |
20190148047 | SEMICONDUCTOR DEVICE | 05-16-2019 |
20080204158 | APPARATUS AND METHOD FOR GENERATING A SUPPLY VOLTAGE-DEPENDENT CLOCK SIGNAL - An integrated circuit having a logic circuit having logic elements in a signal path having a signal propagation duration, wherein the logic elements have switching times depending on a supply voltage, and having an input for a clock signal, and an oscillator circuit having oscillator elements having switching times depending on the supply voltage, so that a frequency of the clock signal is adapted depending on the supply voltage to allow signal propagation of a signal through the signal path during a clock cycle of the clock signal in a case of a supply voltage drop, and having an output for the clock signal connected to the input of the logic circuit. | 08-28-2008 |
20080266013 | Voltage Controlled Oscillator - The cathode of a first varactor diode (VD | 10-30-2008 |
20080290958 | Resonator with adjustable capacitance for medical device - Systems and methods for a resonator with an adjustable capacitance for a medical device. In one embodiment, a resonator system includes a resonator device with an LC resonator circuit that has an adjustable capacitance, an inductor coil in series with the adjustable capacitance, and an adjustable capacitance control that can control the adjustable capacitance to obtain different particular capacitance values. This embodiment also includes a medical device, positioned with the resonator device, so that at least a portion of the inductor coil surrounds a space that is surrounded by at least a portion of the medical device. | 11-27-2008 |
20090009257 | Varactor Trimming Arrangement - Implementations are presented herein that relate to circuit arrangements that employ the use of a varactor. | 01-08-2009 |
20090115543 | Voltage Controlled Piezoelectric Oscillator that can be Linear Frequency Controlled - In conventional frequency control by single-direction voltage control to a variable capacitance diode, there is a limit in an amount of correction for obtaining a straight line. The variable capacitance unit that configures a voltage controlled piezoelectric oscillator comprises a first variable capacitance diode, a first condenser connected in parallel with the first variable capacitance diode, the second variable capacitance diode, a second condenser inserted and connected between a cathode of the first variable capacitance diode and an anode of the second variable capacitance diode, a third condenser inserted and connected between an anode of the first variable capacitance diode and a cathode of the second variable capacitance diode. The external control voltage is applied to the first variable capacitance diode and the second variable capacitance diode so that respective polarities thereof are reversed. | 05-07-2009 |
20090309669 | MICROWAVE OSCILLATOR USING INTEGRATED CIRCUIT TECHNOLOGY - The invention relates to a millimeter frequency oscillator using integrated circuit technology. The oscillator includes a microwave output (Sf) providing an oscillation frequency F | 12-17-2009 |
20100026404 | VOLTAGE-CONTROLLED OSCILLATOR, PHASE-LOCKED LOOP CIRCUIT AND CLOCK DATA RECOVERY CIRCUIT - A voltage-controlled oscillator is provided with inductor | 02-04-2010 |
20100090774 | Techniques For Providing Option Conductors to Connect Components in an Oscillator Circuit - An oscillator circuit includes transistors that are cross-coupled through routing conductors in a first conductive layer. The oscillator circuit also includes a varactor, a capacitor, and an option conductor in a second conductive layer. The option conductor forms at least a portion of a connection between one of the transistors and the capacitor or the varactor. | 04-15-2010 |
20110080226 | Voltage controlled oscillator and electronic component - To provide a voltage controlled oscillator having small size and capable of obtaining a low phase noise characteristic over a large span of adjustable range of frequency. A quartz crystal having a characteristic (dielectric loss tangent: tan δ) better than that of fluorocarbon resin, LTCC or the like conventionally used as a substrate of a resonance part | 04-07-2011 |
20110140798 | TUNABLE ARTIFICIAL DIELECTRICS - Tuning devices and methods are disclosed. One of the devices comprises a metal structure connected with artificial dielectric elements, and variable capacitance devices. Each variable capacitance device is connected with a respective artificial dielectric element and with a control signal. Control of the variation of the capacitance allows the desired tuning. Another device comprises metallic structures connected with artificial dielectric elements and switches connected between the artificial dielectric elements. Turning ON and OFF the switches allows the capacitance between artificial dielectric elements to be varied and a signal guided by the metallic structures to be tuned. | 06-16-2011 |
20130033335 | SYSTEM AND METHOD FOR TUNING A SEMI-DIGITAL FINITE IMPULSE RESPONSE (sFIR) FILTER - In accordance with some embodiments of the present disclosure, a method for tuning a semi-digital finite impulse response (sFIR) filter comprises coupling a switch between an output of a shift register element associated with an input of the sFIR filter and a resistor coupled to an output of the sFIR filter. The shift register element and the resistor are associated with a tap of the sFIR filter. The method further comprising at least one of closing the switch according to a control signal to couple the resistor with the output of the shift register element such that a tap is added to the sFIR filter and opening the switch according to the control signal to decouple the resistor from the output of the shift register element such that a tap is subtracted from the sFIR filter to tune the corner frequency of the sFIR filter. | 02-07-2013 |
20130234801 | OSCILLATOR CIRCUIT - An oscillator circuit includes a signal generator having a compensation frequency output node that provides a compensation frequency signal at the compensation frequency output node. A pulse generator having a pulsed signal output node and a pulse generator input node is coupled to the compensation frequency output node and converts the compensation frequency signal into a series of compensation binary pulses having a constant pulse duration regardless of variations in the duty cycle of the compensation binary pulses. An oscillator module having at least two capacitors, an oscillator output node and a pulsed signal input node is coupled to the pulsed signal output node, and provides an output signal that is at a frequency dependent on charging rates of the capacitors. Drift variations in the capacitors are offset by variations in a duty cycle of the compensation binary pulses supplied in order to maintain constant charging rates of the capacitors. | 09-12-2013 |
20140167871 | FREQUENCY TUNING AND STEP CONTROL OF A DIGITALLY CONTROLLED OSCILLATOR - A variable leaf capacitor is disclosed. In accordance with some embodiments of the present disclosure, a variable leaf capacitor may comprise a first alternating current coupling capacitor having a first terminal coupled to a first differential node and a second terminal coupled to a first common-mode node, a second alternating current coupling capacitor having a first terminal coupled to a second differential node and a second terminal coupled to a second common-mode node, and a varactor having a bias terminal, a first common-mode terminal coupled to the first common-mode node, and a second common-mode terminal coupled to the second common-mode node, wherein the capacitance of the varactor is based on the voltage from the first common-mode terminal of the varactor to the bias terminal of the varactor and on the voltage from the second common-mode terminal of the varactor to the bias terminal of the varactor. | 06-19-2014 |
20140266486 | ON-DIE TRIM-ABLE PASSIVE COMPONENTS FOR HIGH VOLUME MANUFACTURING - Described is an apparatus to trim on-die passive components. The apparatus comprises: a resistor-capacitor (RC) dominated oscillator independent of first order transistor speed dependency, wherein the RC dominated oscillator including one or more resistors and capacitors with programmable resistance and capacitance, and wherein the RC dominated oscillator to generate an output signal having a frequency depending substantially on values of the programmable resistance and capacitance; and a trim-able resistor or capacitor operable to be trimmed, for compensating process variations, according to a program code associated with the programmable resistance and capacitance of the RC dominated oscillator. | 09-18-2014 |
331179000 | Step-frequency change (e.g., band selection, frequency-shift keying) | 10 |
20080197933 | METHOD OF ELIMINATING TEMPERATURE INDUCED BAND SWITCHING IN ULTRA WIDEBAND VOLTAGE CONTROLLED OSCILLATOR - A method and a voltage-controlled oscillator provide an output signal with a frequency within one of a plurality of frequency bands, while reducing or eliminating temperature-induced band-switching or other drifts in operating frequency. The band-switching is reduced or eliminated by providing a circuit that adjusts a tuning sensitivity according to a calibration performed under test conditions. For example, such a voltage-controlled oscillator may include (a) a digitally controlled variable current source for providing a first control current to select one of the frequency bands for the voltage-controlled oscillator; (b) a variable transconductance circuit providing a second control current to compensate a variation in operating frequency; and (c) a control circuit for varying the frequency of the output signal in accordance with the first and second control signals. The variable transconductance circuit may be programmable by selectively activating elements of an array of varactor circuits, according to a capacitance associated with each varactor circuit. The capacitance associated with each varactor circuit is binary weighted. | 08-21-2008 |
20080197934 | INTEGRATABLE CIRCUIT ARRANGEMENT AND INTEGRATED CIRCUIT - An integratable circuit arrangement is provided having a circuit unit, controllable by means of at least one control voltage, to provide a high-frequency output signal dependent on the at least one control voltage. According to the invention, (a) a clocked DC converter is provided, which is formed to provide at least one control voltage, depending on a control signal applied at its clock input, and (b) the circuit arrangement is formed to supply the clock input with a control signal, dependent on the high-frequency output signal. | 08-21-2008 |
20090243741 | METHOD AND SYSTEM FOR PROCESSING SIGNALS VIA AN OSCILLATOR LOAD EMBEDDED IN AN INTEGRATED CIRCUIT (IC) PACKAGE - Aspects of a method and system for processing signals via an oscillator load embedded in an IC package are provided. In this regard, a hybrid circuit may comprise an oscillator, and a frequency of the oscillator may be controlled via a digital control word. Furthermore, the hybrid circuit may comprise an integrated circuit bonded to a multi-layer package and at least a portion of the oscillator may be within and/or on the multi-layer package. The at least a portion of the oscillator may be fabricated in one or more metal layers of the multi-layer package. The at least a portion of the oscillator in the multi-layer package may be fabricated utilizing microstrip and/or stripline transmission line. A frequency of the oscillator may be controlled via one or more inductors and/or capacitors in the portion of the oscillator in the multi-layer package. | 10-01-2009 |
20090243742 | METHOD AND SYSTEM FOR FREQUENCY TUNING BASED ON CHARACTERIZATION OF AN OSCILLATOR - Aspects of a method and system for frequency tuning based on characterization of an oscillator are provided. In this regard, a frequency of an oscillator in an integrated circuit may be controlled based on a first digital control word, a frequency of a tuned circuit may be controlled based on a second digital control word, and the second control word may be determined utilizing a mapping between the first control word and the second control word. The frequency of the oscillator and the tuned circuit may be controlled by adjusting a capacitance of the oscillator and tuned circuit, respectively. The mapping may be based on a relationship between the oscillator and the tuned circuit, such as logical and/or mathematical relationship between the capacitance of the oscillator and the capacitance of the tuned circuit and/or the relationship between the frequency of the oscillator and the frequency of the tuned circuit. | 10-01-2009 |
20090243743 | VARACTOR BANK SWITCHING BASED ON ANTI-PARALLEL BRANCH CONFIGURATION - A system and apparatus for varactor bank switching for a voltage controlled oscillator, is disclosed. Varactor bank switching involves partitioning a varactor bank switch into two anti-parallel branches, wherein each branch comprises a pass-gate circuit that is series-connected to a fixed varactor or capacitor; and maintaining an output common mode voltage of an actual oscillator signal at the varactor-side terminal of each pass-gate circuit, such that a threshold voltage of the switch transistor in the pass-gate circuit is not exceeded and the switch remains in an off-state. | 10-01-2009 |
20100019856 | Monolithic Clock Generator and Timing/Frequency Reference - In various embodiments, the invention provides a clock generator and/or a timing and frequency reference, with multiple operating modes, such power conservation, clock, reference, and pulsed modes. The various apparatus embodiments include a resonator adapted to provide a first signal having a resonant frequency; an amplifier; a temperature compensator adapted to modify the resonant frequency in response to temperature; and a process variation compensator adapted to modify the resonant frequency in response to fabrication process variation. In addition, the various embodiments may also include a frequency divider adapted to divide the first signal having the resonant frequency into a plurality of second signals having a corresponding plurality of frequencies substantially equal to or lower than the resonant frequency; and a frequency selector adapted to provide an output signal from the plurality of second signals. The output signal may be provided in any of various forms, such as differential or single-ended, and substantially square-wave or sinusoidal. | 01-28-2010 |
20100045395 | FREQUENCY ADJUSTMENT FOR CLOCK GENERATOR - A fractional-N divider receives an input signal and supplies a divided signal divided in accordance with an integer divide control signal determined from a divide ratio. A phase interpolator is coupled to the fractional-N divider to adjust a phase of the divided signal according to a fractional portion of the divide ratio. The apparatus, responsive to a request for a frequency adjustment of the generated signal in a programmable number of steps, is configured to adjust the frequency of the generated signal from a beginning frequency to an ending frequency in the programmable number of steps by adjusting the supplied divide ratio at each step. | 02-25-2010 |
20110169585 | Monolithic Clock Generator and Timing/Frequency Reference - In various embodiments, the invention provides a clock generator and/or a timing and frequency reference, with multiple operating modes, such power conservation, clock, reference, and pulsed modes. The various apparatus embodiments include a resonator adapted to provide a first signal having a resonant frequency; an amplifier; a temperature compensator adapted to modify the resonant frequency in response to temperature; and a process variation compensator adapted to modify the resonant frequency in response to fabrication process variation. In addition, the various embodiments may also include a frequency divider adapted to divide the first signal having the resonant frequency into a plurality of second signals having a corresponding plurality of frequencies substantially equal to or lower than the resonant frequency; and a frequency selector adapted to provide an output signal from the plurality of second signals. The output signal may be provided in any of various forms, such as differential or single-ended, and substantially square-wave or sinusoidal. | 07-14-2011 |
20120081188 | WIDEBAND TEMPERATURE COMPENSATED RESONATOR AND WIDEBAND VCO - A resonator of a VCO includes a fine tuning main varactor circuit, an auxiliary varactor circuit, and a coarse tuning capacitor bank circuit coupled in parallel with an inductance. The main varactor circuit includes a plurality of circuit portions that can be separately disabled. Within each circuit portion is a multiplexing circuit that supplies a selectable one of either a fine tuning control signal (FTAVCS) or a temperature compensation control signal (TCAVCS) onto a varactor control node within the circuit portion. If the circuit portion is enabled then the FTAVCS is supplied onto the control node so that the circuit portion is used for fine tuning. If the circuit portion is disabled then the TCAVCS is supplied onto the control node so that the circuit portion is used to combat VCO frequency drift as a function of temperature. How the voltage of the TCAVCS varies with temperature is digitally programmable. | 04-05-2012 |
20130088303 | APPARATUS, AND ASSOCIATED METHOD, FOR FORMING A SYNTHESIZED OSCILLATING SIGNAL - An apparatus, and an associated method, for synthesizing a discrete-valued oscillating signal. Input parameters are provided that are determinative of the frequency, gain, and phase characteristics of the resultant, oscillating signal. The discrete-valued, oscillating signal is combinable with another signal to form a mixed signal of a desired frequency, gain, and phase characteristic using a single complex multiplication operation. | 04-11-2013 |
331181000 | Variable inductance device (e.g., saturable core or adjustable vane inductor) | 5 |
20090102572 | PARALLEL-STRUCTURED SWITCHED VARIABLE INDUCTOR CIRCUIT - An inductor circuit includes a pair of inductors connected in parallel with each other and a switch for turning on and off electric power to one of the pair of inductors. The inductance of the inductor circuit can be varied and the quality factor Q can be improved. Further, RF circuits employing the inductor circuit can generate an intended operating frequency. | 04-23-2009 |
20090174493 | ADJUSTABLE INDUCTOR AND WIDEBAND VOLTAGE CONTROLLED OSCILLATOR - An adjustable inductor includes a first conductor line to receive an alternating current (AC) signal, a second conductor line configured in a loop arrangement, to generate an inducting current upon receiving the AC signal at the first conductor line, and a switch to adjust an inductance of the first conductor line by switching a loop connection of the second conductor line according to an external control signal. | 07-09-2009 |
20090189706 | INDUCTANCE-SWITCHABLE DUAL-BAND VOLTAGE CONTROLLED OSCILLATION CIRCUIT - An inductance-switchable dual-band voltage-controlled oscillation circuit is proposed, which is designed for integration to a high-frequency signal processing system, such as an ultra-wideband (UWB) circuit system, for providing a dual-band voltage-controlled oscillating signal generating function. The proposed voltage-controlled oscillation circuit is characterized by the use of a switchable inductance circuit architecture in lieu of a switchable capacitive circuit architecture for integration to a fixed-inductance circuit architecture to constitute a variable-inductance LC tuning circuit architecture that allows the provision of a dual-band oscillating signal generating function. Further, a current mirror circuit module is used to maintain the quality factor of the LC tuning circuit in both operating modes; a buffer-stage circuit architecture is used to achieve low power consumption, low phase noise, and broad tuning range. | 07-30-2009 |
20100225408 | METHOD AND SYSTEM FOR VOLTAGE CONTROLLED OSCILLATOR IMPEDANCE CONTROL TO OPTIMIZE PERFORMANCE, EFFICIENCY, AND POWER CONSUMPTION - Methods and systems for VCO impedance control to optimize performance, efficiency, and power consumption are disclosed and may include selectively coupling one of a plurality of taps on a multi-tap inductive load to a voltage controlled oscillator (VCO) on a chip comprising a plurality of transmitters and receivers. The multi-tap inductive load may comprise a multi-tap transformer or transmission line, which may be integrated on the chip, or may be integrated on a package to which the chip is coupled. A voltage swing at an output of the VCO and/or a current in the VCO may be adjusted by configuring a load of the VCO utilizing the multi-tap inductive load. The multi-tap inductive load may be coupled to the VCO utilizing one or more CMOS switches. | 09-09-2010 |
20140361845 | VARIABLE CAPACITANCE CIRCUIT, OSCILLATOR CIRCUIT, VIBRATORY DEVICE, ELECTRONIC APPARATUS, MOVING OBJECT, AND METHOD OF MANUFACTURING VIBRATORY DEVICE - A variable capacitance circuit includes a plurality of variable capacitance elements (varicaps) each having the capacitance value controlled in accordance with the inter-terminal voltage applied between the terminals of the variable capacitance element and connected in parallel to each other, has the combined capacitance value of the plurality of variable capacitance elements variable taking a predetermined capacitance value as a base, sets the inter-terminal voltage of at least one of the plurality of variable capacitance elements to a first voltage as a variable voltage, and sets the inter-terminal voltage of the rest of the plurality of variable capacitance elements to a second voltage as a stationary voltage. | 12-11-2014 |
331177000 | With voltage sensitive capacitor | 14 |
20080266012 | METHOD FOR CONTROLLING HIGH-FREQUENCY RADIATOR - A method for controlling a high-frequency radiator includes the steps of: (a) applying a high-frequency radiation through the solid-state oscillator and the antenna; (b) sensing part of the high-frequency radiation returned from the antenna to the solid-state oscillator; (c) adjusting radiation/propagation conditions for the high-frequency radiation on the basis of the sensed results in the step (b), the high-frequency radiation propagating from the solid-state oscillator to the antenna; and (d) after the step (c), applying the high-frequency radiation through the solid-state oscillator and the antenna to a target object. In the step (c), the oscillation frequency of the solid-state oscillator, the power of the high-frequency radiation applied by the solid-state oscillator, the power supply voltage supplied to the solid-state oscillator, the impedance match between the output impedance of the solid-state oscillator and the impedance of the antenna, or any other condition is changed. | 10-30-2008 |
20090051454 | Voltage controlled oscillator - According to one aspect of the present invention, there is provided a voltage controlled oscillator controlling frequency of an output signal according to input voltage, the voltage controlled oscillator including a current controlled oscillator setting the frequency of the output signal based on control current, and a voltage-current converter including a transistor controlling a current amount of the control current according to the input voltage, in which the voltage-current converter is supplied with control voltage, and threshold value voltage of the transistor is controlled according to the control voltage. | 02-26-2009 |
20090243740 | METHOD AND SYSTEM FOR REDUCED JITTER SIGNAL GENERATION - Aspects of a method and system for reduced jitter signal generation are provided. In this regard, an output frequency of an oscillator circuit may be controlled via a digital control word, wherein a least significant bit of the digital control word may control one or more variable capacitors and remaining bits of the digital control word may control one or more banks of fixed capacitors. The least significant bit may be filtered to generate a signal corresponding to an average voltage of the least significant bit. In this regard, the generated signal may be a voltage corresponding to the average voltage of the least significant bit and may control the variable capacitor. The digital control word may be representative of a phase difference between a reference signal and a feedback signal and may be generated via a digital multiplier. | 10-01-2009 |
20090284321 | Temperature and Process Independent Voltage Controlled Oscillator Circuit - Techniques for voltage controlled oscillator (VCO) circuits that are independent of temperature and process variations are described herein. | 11-19-2009 |
20100039184 | ELECTRONIC DEVICE FOR GENERATING A LOCAL OSCILLATOR SIGNAL HAVING A FREQUENCY EQUAL TO A FRACTIONAL PART OF A FUNDAMENTAL FREQUENCY - An electronic device (ED) is intended for generating a local oscillator signal having a chosen frequency F | 02-18-2010 |
20100085126 | OSCILLATION CIRCUIT INCLUDING MIT DEVICE AND METHOD OF ADJUSTING OSCILLATION FREQUENCY OF THE OSCILLATION CIRCUIT - Provided are an MIT device-based oscillation circuit including a power source, an MIT device and a variable resistor, in which a generation of an oscillation and an oscillation frequency are determined according to a voltage applied from the power source and a resistance of the variable resistor, and a method of adjusting the oscillation frequency of the oscillation circuit. The MIT device includes an MIT thin film and an electrode thin film connected to the MIT thin film, and generates a discontinuous MIT at an MIT generation voltage, the variable resistor is connected in series to the MIT device, and the power source applies a voltage or an electric current to the MIT device. The generation of an oscillation and an oscillation frequency are determined according to the voltage applied from the power source and the resistance of the variable resistor. | 04-08-2010 |
20100127788 | SELECTABLE LOCAL OSCILLATOR - A selectable local oscillator provides an output frequency signal having a selectable frequency within a desired output frequency range. The selectable local oscillator comprises first, second and third signal generators configured to provide first, second and third frequency signals having frequencies in first, second and third input frequency ranges. A first mixer provides a first mixed product signal having an upper sideband and a lower sideband. A frequency selector selects one of the upper and lower sidebands of the first mixed product signal. A second mixer provides a second mixed product signal having an upper sideband and a lower sideband. An output stage selects at least one of the upper and lower sidebands of the second mixed product signal as the output frequency signal. | 05-27-2010 |
20100237960 | FREQUENCY-JITTERING APPARATUSES, FREQUENCY-JITTERING METHODS AND POWER MANAGEMENT DEVICES - A frequency-jittering apparatuses includes an oscillator and a frequency control circuit. The oscillator generates a signal. When the magnitude of the signal exceeds a magnitude of a reference signal, the oscillator operates substantially in a first state; and when the magnitude of the signal is lower than the magnitude of the reference signal, the oscillator operates substantially in a second state different from the first one. The frequency control circuit varies the reference signal to change the frequency of the signal output from the oscillator. | 09-23-2010 |
20100289593 | CLOCK AND DATA RECOVERY CIRCUIT - An embodiment of the invention provides a clock and data recovery circuit. The clock and data recovery circuit comprises a phase detector, a pre-accumulator, a register, an accumulator and a digital controlled oscillator. By using the transmission path formed by the pre-accumulator, the output of the phase detector can be transmitted to the digital controlled oscillator in advance to adjust the frequency of its output clock signal and the latency due to the accumulator can be reduced. | 11-18-2010 |
20120176204 | OSCILLATOR CIRCUIT - An oscillator circuit includes a clock oscillator which outputs a main clock signal having an oscillating frequency switched between a high frequency and a low frequency in response to a frequency selection signal, and a frequency divider circuit which outputs a sub-clock signal having a divided frequency equivalent to a frequency division ratio of the oscillating frequency of the main clock signal, the frequency division ratio being switched in response to the frequency selection signal. The divided frequency of the sub-clock signal is predetermined for each of the high frequency and the low frequency to which the oscillating frequency is switched in response to the frequency selection signal. | 07-12-2012 |
20120249256 | CALIBRATION CIRCUIT OF A FREQUENCY GENERATOR, frequency generator, AND COMPENSATION CIRCUIT THEREOF - A calibration circuit includes at least two compensation circuits and a comparator. The at least two compensation circuits are coupled to an input signal for outputting at least a first compensation signal and a second compensation signal respectively. The comparator is coupled to the first compensation signal and the second compensation signal for outputting a calibration signal, where the calibration signal is used for determining an oscillation frequency of a crystal oscillator to achieve a purpose of frequency compensation with a temperature. | 10-04-2012 |
20120262245 | SIGNAL PROCESSING DEVICE AND METHOD FOR PROVIDING OSCILLATING SIGNAL IN THE SIGNAL PROCESSING DEVICE - A signal processing device includes a signal processing chip and a conducting path. The signal processing chip includes: a first port capable of receiving a first oscillating signal; a second port capable of outputting a second oscillating signal derived from the first oscillating signal; and a third port. The conducting path is external to the signal processing chip and coupled to the second port and the third port, and the conducting path is capable of transmitting the second oscillating signal outputted from the second port to the third port. | 10-18-2012 |
20130009718 | OSCILLATING SIGNAL GENERATING APPARATUS AND CONTROL SIGNAL GENERATOR OF THE OSCILLATING SIGNAL GENERATING APPARATUS - An oscillating signal generating device includes: an oscillating circuit arranged to generate an oscillating signal according to a current controlled signal; and a control signal generating circuit coupled to the oscillating circuit, the control signal generating circuit for receiving a first reference voltage and a second reference voltage, the control signal generating circuit operated between the first reference voltage and the second reference voltage, and the control signal generating circuit arranged to generate the current controlled signal according to a voltage input signal; wherein the control signal generating circuit is capable of monotonically generating the current controlled signal according to the voltage input signal when a voltage level of the voltage input signal falls between the first reference voltage and the second reference voltage. | 01-10-2013 |
20130027149 | METHOD AND CIRCUIT FOR INCREASING THE RESOLUTION OF A DIGITALLY CONTROLLED OSCILLATOR - A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency. | 01-31-2013 |
20130057356 | MAGNETORESISTIVE RADIOFREQUENCY OSCILLATOR AND METHOD FOR GENERATING AN OSCILLATING SIGNAL - The invention relates to a radio frequency oscillator which incorporates: a spin-polarized electric current magnetoresistive device ( | 03-07-2013 |
20130057357 | MAGNETORESISTIVE RADIOFREQUENCY OSCILLATOR AND METHOD FOR GENERATING AN OSCILLATING SIGNAL - The invention relates to a radiofrequency oscillator which incorporates: a spin-polarized electric current magnetoresistive device ( | 03-07-2013 |
20130285757 | CONTROL CIRCUIT FOR REDUCING ELECTROMAGNETIC INTERFERENCE - A control circuit for reducing electromagnetic interference is provided. The control circuit includes a periodic signal generator and a modulation controller. The periodic signal generator adjusts a modulation periodic signal generated by the periodic signal generator, according to a feedback modulation signal. The modulation controller is coupled to the periodic signal generator, for receiving the modulation periodic signal, and adjusting a frequency of the received modulation periodic signal according to a plurality of delay periods set according to a plurality of control signals, and generating the feedback modulation signal. | 10-31-2013 |
20140203884 | Numerically-Controlled Oscillator - Various techniques for generating an output clock based on a reference clock. This disclosure relates to generating an output clock signal based on a reference clock signal. In one embodiment, a method includes generating, using information received from a control circuit, an output clock signal using both a first number of edges or an input clock signal and a second, different number of edges of the input clock signal. In this embodiment, the control circuit runs at a frequency that is less than a frequency of the input clock signal. The received information may indicate, for a pulse of the output clock signal, whether the pulse should be generated using the first number of edges or the second number of edges. In some cases, the second number of edges may be the first number of edges plus one. The first and second number of edges may be programmable quantities. | 07-24-2014 |
20140306774 | DIGITALLY CONTROLLED OSCILLATOR AND OUTPUT FREQUENCY CONTROL METHOD - A digitally controlled oscillator that generates an output frequency according to input data includes a determination unit that determines whether the input data has a value that causes deterioration in a phase noise characteristic of the digitally controlled oscillator, an offset unit that offsets the input data when the input data is determined to have the value that causes deterioration in the phase noise characteristic, and a generating unit that generates the output frequency using the input data after being offset. | 10-16-2014 |
20150015342 | ON-CHIP OSCILLATING METHOD ABLE TO CALIBRATE FREQUENCY THEREOF AND ASSOCIATED APPARATUS - An on-chip oscillating method which is able to calibrate a frequency of an on-chip oscillator includes: utilizing the on-chip oscillator to generate a predetermined frequency output; receiving an external data input from an off-chip data source; generating a comparison result by comparing the predetermined frequency output with the external data input; and calibrating the predetermined frequency output by utilizing the comparison result. An on-chip oscillating apparatus which is able to calibrate its frequency includes: the on-chip oscillator, arranged to generate a predetermined frequency output; a receiving unit, arranged for receiving an external data input from an off-chip data source; and a comparison unit, arranged for generating a comparison result for calibrating the predetermined frequency output by comparing a predetermined frequency output with an external data input from an off-chip data source. | 01-15-2015 |
20160079962 | Electronic Device with Switched-Capacitor Tuning and Related Method - A device comprises a first capacitor block comprising a plurality of first capacitors connected in a first configuration, a second capacitor block comprising a plurality of second capacitors connected in the first configuration, a third capacitor block comprising a plurality of third capacitors connected in a second configuration, a fourth capacitor block comprising a plurality of fourth capacitors connected in the second configuration, a first switch connected between the first capacitor block and the second capacitor block, a second switch connected between the third capacitor block and the fourth capacitor block, a third switch connected between the first capacitor block and the fourth capacitor block and a fourth switch connected between the third capacitor block and the second capacitor block. | 03-17-2016 |
20160126889 | VOLTAGE-CONTROLLED OSCILLATOR WITH MASK-SELECTABLE PERFORMANCE - An apparatus having a substrate with an inductor, a first die and a second die is disclosed. The first die may be (i) mounted on the substrate, (ii) configured to vary a frequency of a signal in the inductor, and (iii) fabricated with multiple first masks. The second die may be (i) mounted on the substrate, (ii) configured to excite the signal, and (iii) fabricated with multiple second masks. A particular one of the first masks generally has several designs that customize the first die to several configurations respectively. A particular one of the second masks may have several designs that customize the second die to several configurations respectively. The first die, the second die and the inductor may form a voltage-controlled oscillator. A selected first design and a selected second design generally establish multiple performances of the voltage-controlled oscillator. | 05-05-2016 |
20160380641 | ELECTRONIC CIRCUIT - An electronic circuit includes an oscillator configured to generate an oscillating signal having a cycle responsive to an input signal, a voltage detector configured to produce a detection signal responsive to a power supply voltage, a frequency divider configured to generate a frequency-divided signal obtained by dividing a frequency of the oscillating signal by a frequency-division ratio responsive to the detection signal, and an adder configured to obtain a sum of a first signal and a second signal and to supply a signal responsive to the sum to the oscillator as the input signal, the first signal being responsive to a difference in phase between the frequency-divided signal and a reference signal, and the second signal being responsive to the detection signal. | 12-29-2016 |
20190148047 | SEMICONDUCTOR DEVICE | 05-16-2019 |
20080204158 | APPARATUS AND METHOD FOR GENERATING A SUPPLY VOLTAGE-DEPENDENT CLOCK SIGNAL - An integrated circuit having a logic circuit having logic elements in a signal path having a signal propagation duration, wherein the logic elements have switching times depending on a supply voltage, and having an input for a clock signal, and an oscillator circuit having oscillator elements having switching times depending on the supply voltage, so that a frequency of the clock signal is adapted depending on the supply voltage to allow signal propagation of a signal through the signal path during a clock cycle of the clock signal in a case of a supply voltage drop, and having an output for the clock signal connected to the input of the logic circuit. | 08-28-2008 |
20080266013 | Voltage Controlled Oscillator - The cathode of a first varactor diode (VD | 10-30-2008 |
20080290958 | Resonator with adjustable capacitance for medical device - Systems and methods for a resonator with an adjustable capacitance for a medical device. In one embodiment, a resonator system includes a resonator device with an LC resonator circuit that has an adjustable capacitance, an inductor coil in series with the adjustable capacitance, and an adjustable capacitance control that can control the adjustable capacitance to obtain different particular capacitance values. This embodiment also includes a medical device, positioned with the resonator device, so that at least a portion of the inductor coil surrounds a space that is surrounded by at least a portion of the medical device. | 11-27-2008 |
20090009257 | Varactor Trimming Arrangement - Implementations are presented herein that relate to circuit arrangements that employ the use of a varactor. | 01-08-2009 |
20090115543 | Voltage Controlled Piezoelectric Oscillator that can be Linear Frequency Controlled - In conventional frequency control by single-direction voltage control to a variable capacitance diode, there is a limit in an amount of correction for obtaining a straight line. The variable capacitance unit that configures a voltage controlled piezoelectric oscillator comprises a first variable capacitance diode, a first condenser connected in parallel with the first variable capacitance diode, the second variable capacitance diode, a second condenser inserted and connected between a cathode of the first variable capacitance diode and an anode of the second variable capacitance diode, a third condenser inserted and connected between an anode of the first variable capacitance diode and a cathode of the second variable capacitance diode. The external control voltage is applied to the first variable capacitance diode and the second variable capacitance diode so that respective polarities thereof are reversed. | 05-07-2009 |
20090309669 | MICROWAVE OSCILLATOR USING INTEGRATED CIRCUIT TECHNOLOGY - The invention relates to a millimeter frequency oscillator using integrated circuit technology. The oscillator includes a microwave output (Sf) providing an oscillation frequency F | 12-17-2009 |
20100026404 | VOLTAGE-CONTROLLED OSCILLATOR, PHASE-LOCKED LOOP CIRCUIT AND CLOCK DATA RECOVERY CIRCUIT - A voltage-controlled oscillator is provided with inductor | 02-04-2010 |
20100090774 | Techniques For Providing Option Conductors to Connect Components in an Oscillator Circuit - An oscillator circuit includes transistors that are cross-coupled through routing conductors in a first conductive layer. The oscillator circuit also includes a varactor, a capacitor, and an option conductor in a second conductive layer. The option conductor forms at least a portion of a connection between one of the transistors and the capacitor or the varactor. | 04-15-2010 |
20110080226 | Voltage controlled oscillator and electronic component - To provide a voltage controlled oscillator having small size and capable of obtaining a low phase noise characteristic over a large span of adjustable range of frequency. A quartz crystal having a characteristic (dielectric loss tangent: tan δ) better than that of fluorocarbon resin, LTCC or the like conventionally used as a substrate of a resonance part | 04-07-2011 |
20110140798 | TUNABLE ARTIFICIAL DIELECTRICS - Tuning devices and methods are disclosed. One of the devices comprises a metal structure connected with artificial dielectric elements, and variable capacitance devices. Each variable capacitance device is connected with a respective artificial dielectric element and with a control signal. Control of the variation of the capacitance allows the desired tuning. Another device comprises metallic structures connected with artificial dielectric elements and switches connected between the artificial dielectric elements. Turning ON and OFF the switches allows the capacitance between artificial dielectric elements to be varied and a signal guided by the metallic structures to be tuned. | 06-16-2011 |
20130033335 | SYSTEM AND METHOD FOR TUNING A SEMI-DIGITAL FINITE IMPULSE RESPONSE (sFIR) FILTER - In accordance with some embodiments of the present disclosure, a method for tuning a semi-digital finite impulse response (sFIR) filter comprises coupling a switch between an output of a shift register element associated with an input of the sFIR filter and a resistor coupled to an output of the sFIR filter. The shift register element and the resistor are associated with a tap of the sFIR filter. The method further comprising at least one of closing the switch according to a control signal to couple the resistor with the output of the shift register element such that a tap is added to the sFIR filter and opening the switch according to the control signal to decouple the resistor from the output of the shift register element such that a tap is subtracted from the sFIR filter to tune the corner frequency of the sFIR filter. | 02-07-2013 |
20130234801 | OSCILLATOR CIRCUIT - An oscillator circuit includes a signal generator having a compensation frequency output node that provides a compensation frequency signal at the compensation frequency output node. A pulse generator having a pulsed signal output node and a pulse generator input node is coupled to the compensation frequency output node and converts the compensation frequency signal into a series of compensation binary pulses having a constant pulse duration regardless of variations in the duty cycle of the compensation binary pulses. An oscillator module having at least two capacitors, an oscillator output node and a pulsed signal input node is coupled to the pulsed signal output node, and provides an output signal that is at a frequency dependent on charging rates of the capacitors. Drift variations in the capacitors are offset by variations in a duty cycle of the compensation binary pulses supplied in order to maintain constant charging rates of the capacitors. | 09-12-2013 |
20140167871 | FREQUENCY TUNING AND STEP CONTROL OF A DIGITALLY CONTROLLED OSCILLATOR - A variable leaf capacitor is disclosed. In accordance with some embodiments of the present disclosure, a variable leaf capacitor may comprise a first alternating current coupling capacitor having a first terminal coupled to a first differential node and a second terminal coupled to a first common-mode node, a second alternating current coupling capacitor having a first terminal coupled to a second differential node and a second terminal coupled to a second common-mode node, and a varactor having a bias terminal, a first common-mode terminal coupled to the first common-mode node, and a second common-mode terminal coupled to the second common-mode node, wherein the capacitance of the varactor is based on the voltage from the first common-mode terminal of the varactor to the bias terminal of the varactor and on the voltage from the second common-mode terminal of the varactor to the bias terminal of the varactor. | 06-19-2014 |
20140266486 | ON-DIE TRIM-ABLE PASSIVE COMPONENTS FOR HIGH VOLUME MANUFACTURING - Described is an apparatus to trim on-die passive components. The apparatus comprises: a resistor-capacitor (RC) dominated oscillator independent of first order transistor speed dependency, wherein the RC dominated oscillator including one or more resistors and capacitors with programmable resistance and capacitance, and wherein the RC dominated oscillator to generate an output signal having a frequency depending substantially on values of the programmable resistance and capacitance; and a trim-able resistor or capacitor operable to be trimmed, for compensating process variations, according to a program code associated with the programmable resistance and capacitance of the RC dominated oscillator. | 09-18-2014 |