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Amplifiers

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Class / Patent application numberDescriptionNumber of patent applications / Date published
330250000 WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) 1973
330149000 HUM OR NOISE OR DISTORTION BUCKING INTRODUCED INTO SIGNAL CHANNEL 203
330124000 WITH PLURAL AMPLIFIER CHANNELS (E.G., PARALLEL AMPLIFIER CHANNELS) 192
330127000 WITH CONTROL OF POWER SUPPLY OR BIAS VOLTAGE 177
330075000 SIGNAL FEEDBACK 102
330069000 SUM AND DIFFERENCE AMPLIFIERS 58
330010000 MODULATOR-DEMODULATOR-TYPE AMPLIFIER 57
330009000 WITH PERIODIC SWITCHING INPUT-OUTPUT (E.G., FOR DRIFT CORRECTION) 48
330192000 OUTPUT NETWORKS 33
330002000 WITH AMPLIFIER CONDITION INDICATING OR TESTING MEANS 26
330207000 MISCELLANEOUS 23
330051000 COMBINED WITH AUTOMATIC AMPLIFIER DISABLING SWITCH MEANS 22
330185000 INPUT NETWORKS 16
330199000 WITH POWER OR BIAS VOLTAGE SUPPLY 14
330053000 WITH DISTRIBUTED PARAMETER-TYPE COUPLING MEANS 11
330144000 VARIABLE IMPEDANCE FOR SIGNAL CHANNEL CONTROLLED BY SEPARATE CONTROL PATH 8
330151000 WITH AMPLIFIER BYPASS MEANS (E.G., FORWARD FEED) 7
330007000 WITH CAPACITIVE AMPLIFYING DEVICE 5
20090302936AMPLIFIERS USING GATED DIODES - A circuit comprises a control line and a two terminal semiconductor device having first and second terminals. The first terminal is coupled to a signal line, and the second terminal is coupled to the control line. The two terminal semiconductor device is adapted to have a capacitance when a voltage on the first terminal relative to the second terminal is above a threshold voltage and to have a smaller capacitance when a voltage on the first terminal relative to the second terminal is below the threshold voltage. The control line is coupled to a control signal and the signal line is coupled to a signal and is output of the circuit. A signal is placed on the signal line and voltage on the control line is modified (e.g., raised in the case of n-type devices, or lowered for a p-type devices). When the signal falls below the threshold voltage, the two terminal semiconductor device acts as a very small capacitor and the output of the circuit will be a small value. When the signal is above the threshold voltage, the two terminal semiconductor device acts as a large capacitor and the output of the circuit will be influenced by both the value of the signal and the value of the modified voltage on the control line and therefore the signal will be amplified.12-10-2009
20110291753Segmented Linear FM Power Amplifier - Various apparatuses and methods for amplifying an FM signal in a segmented linear power amplifier are disclosed herein. For example, some embodiments provide an apparatus including a signal input, a signal output, and an output driver connected between the signal input and the signal output. The output driver includes a number of driver segments connected in parallel, each having an input connected to the signal input and each having an output. The output driver also includes a number of series capacitors, each associated with one of the driver segments. The series capacitors are each connected between the output of its associated driver segment and the signal output. The output driver also includes a number of shunt capacitors, each associated with one of the driver segments having an associated series capacitor. The shunt capacitors are each connected between the output of their associated driver segment and a ground.12-01-2011
20110068860DETECTION CIRCUIT WITH IMPROVED ANTI-BLOOMING CIRCUIT - The detection circuit comprises a photodiode connected to an input of a capacitive transimpedance amplifier. The circuit comprises an anti-blooming circuit connected between the input and an output of the capacitive trans-impedance amplifier. The anti-blooming circuit comprises a field effect transistor connected between the input and output of the capacitive trans-impedance amplifier. The transistor is of pMOS type when the input of the capacitive transimpedance amplifier is connected to a cathode of the photodiode. The transistor is of nMOS type when the input of the capacitive transimpedance amplifier is connected to an anode of the photodiode.03-24-2011
20120182067SWITCHED-CAPACITOR PROGRAMMABLE-GAIN AMPLIFIER - A programmable-gain amplifier has a first input node coupled to receive a first input signal and a control input coupled to receive a gain select signal. The programmable-gain amplifier includes a differential amplifier having a first input and a first output and a plurality of capacitors. A first terminal of each of the plurality of capacitors is coupled to the first input of the differential amplifier, and a second terminal of each of the plurality of capacitors is coupled to the first input node during a sampling phase of the programmable-gain amplifier and selectively coupled to the first output of the differential amplifier, based on the gain select signal, during a gain phase of the programmable-gain amplifier.07-19-2012
20110215864SWITCHED CAPACITOR AMPLIFIER - Provided is a switched capacitor amplifier capable of outputting a stable output voltage. The switched capacitor amplifier is capable of operating so as to eliminate a charge/discharge time difference between an input capacitor (09-08-2011
330003000 WITH PLURAL DIVERSE-TYPE AMPLIFYING DEVICES 4
20100019840POWER AMPLIFIER - A power amplifier is provided with an AD converter pulse modulating an envelope signal extracted from a high frequency modulation signal; a switching amplifier amplifying an output signal from the AD converter; a low-pass filter removing high frequency noise from an output signal from the switching amplifier; a voltage control device controlling a power supply voltage of the switching amplifier; and a high frequency amplifier amplifying a phase-modulated signal having a constant envelope and having output from the low-pass filter as a power supply. The average power of the envelope signal to be inputted to the AD converter is permitted to be constant so that an input dynamic range of the AD converter can be most efficiently used. In addition the average power of the output signal from the power amplifier is adjusted by a power supply voltage to be supplied to the switching amplifier.01-28-2010
20100182080DC-OFFSET CANCELLED PROGRAMMABLE GAIN ARRAY FOR LOW-VOLTAGE WIRELESS LAN SYSTEM AND METHOD USING THE SAME - An amplifier circuit includes a transconductance amplifier at an input side of the amplifier circuit, a transimpedance amplifier connected to an output of the transconductance amplifier, and a voltage amplifier connected to an output of the transimpedance amplifier. The transconductance amplifier and the transimpedance amplifier form a low-impedance node at an interface thereof. A feedback circuit is connected between an output of the voltage amplifier and the low-impedance node between the transconductance amplifier and the transimpedance amplifier. The transconductance amplifier, the transimpedance amplifier, and the voltage amplifier form a main amplifier stage. The feedback circuit senses an imbalance in an output of the main amplifier stage, whereby a correction signal is integrated and negatively fed back to the low-impedance node between the transconductance amplifier and the transimpedance amplifier.07-22-2010
20080204131VACUUM TUBE REPLACEMENT DEVICE, CIRCUIT AND SYSTEM - A system is provided for a solid-state implementation of a vacuum tube replacement device. The system may derive power from a target amplifier filament supply. The system may include active or passive functions for noise reduction, voltage isolation, servo biasing, and other functions. The vacuum tube replacement device is pin-for-pin compatible with standard vacuum tube circuit pin configurations. The vacuum tube replacement device system architecture is equally useful for non-vacuum tube systems such as audio amplifier circuits.08-28-2008
20130194037POWER AMPLIFIER, RADIO-FREQUENCY POWER AMPLIFICATION DEVICE, AND AMPLIFICATION CONTROL METHOD - The present invention allows amplification with low distortion and high efficiency.08-01-2013
330157000 INTERSTAGE COUPLING 4
20090212860INTEGRATED CIRCUIT DEVICE AND ELECTRONIC INSTRUMENT - An integrated circuit device includes an amplifier circuit that includes first to Nth amplifiers that are cascaded and receives an input signal, an A/D converter that performs an A/D conversion process on a signal amplified by the amplifier circuit, first to Nth D/A converters that are provided corresponding to the first to Nth amplifiers and used to perform an offset adjustment of the first to Nth amplifiers, and a control circuit that sets an offset adjustment of the first to Nth amplifiers using the first to Nth D/A converters and a gain adjustment of the first to Nth amplifiers.08-27-2009
20090002069VARIABLE CIRCUIT, COMMUNICATION APPARATUS, MOBILE COMMUNICATION APPARATUS AND COMMUNICATION SYSTEM - A variable circuit that has a device that changes the mechanical state thereof and has a characteristic that is changed by a change of the mechanical state of the device, the variable circuit including: a controlling section 01-01-2009
20120007673AMPLIFIER WITH WIDE GAIN RANGE - An amplifier with wide gain range includes a signal converting unit, a channel unit, and multiple amplifiers. The signal converting unit receives a gain modulation signal and accordingly outputs multiple modulation signals and multiple selection signals. Based on a level of the gain modulation signal, one of the selection signals is set at a first logic state and the other selection signals are at a second logic state. The channel unit has multiple channels, respectively controlled by the selection signals, so as to conduct the channel with at the first logic state. The amplifiers are connected in series. Output terminals of the amplifiers are also respectively output to the channels of the channel unit. The amplifiers are also controlled by the modulation signals of the signal converting unit.01-12-2012
20120169419Receiver with Wide Dynamic Range and Low Power Consumption - Some embodiments of the invention relate a circuit having a first and a second electrically connected voltage domains, respectively biased at different supply voltages (e.g., the first voltage domain biased at a low bias voltage and the second voltage domain biased at a second, different supply voltage). The apparatus further comprises a first DC current source coupled to one of the voltage domains (e.g., the first voltage domain having a low DC voltage potential) and a second DC current source coupled to the other voltage domain (e.g., the second voltage domain having a high DC voltage potential). The first and second DC current sources are configured to provide a DC cancellation current having a value that cancels a DC current generated by the potential difference between the first and second voltage domains.07-05-2012
330065000 INVOLVING STRUCTURE OTHER THAN THAT OF TRANSFORMERS PER SE 4
20120007670SYSTEM AND METHOD FOR CONTROLLING RADIO FREQUENCY TRANSMISSIONS FROM AN ELECTRONIC DEVICE - The disclosure relates to a system and method for attenuating harmonics in a power amplifier. An electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device is provided. The circuit comprises: a printed circuit board (PCB) having the power amplifier mounted on the PCB; a first electrical track in the PCB connecting to a power input terminal of the power amplifier; and a first capacitor connected to the first electrical track and a ground reference in the PCB, the first capacitor reducing transmission of radio frequency signals from the input terminal of the power amplifier.01-12-2012
20100188145SYSTEM AND METHOD FOR CONTROLLING RADIO FREQUENCY TRANSMISSIONS FROM AN ELECTRONIC DEVICE - The disclosure relates to a system and method for attenuating harmonics in output signals. In the system, an electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device is provided. The circuit comprises: a printed circuit board ‘PCB’ having the power amplifier mounted on the PCB; a first electrical track in the PCB connecting to a power input terminal of the power amplifier; and a first capacitor connected to the first electrical track and a ground reference in the PCB, the first capacitor reducing transmission of radio frequency signals from the input terminal of the power amplifier.07-29-2010
20120313699SYSTEM AND METHOD FOR CONTROLLING RADIO FREQUENCY TRANSMISSIONS FROM AN ELECTRONIC DEVICE - The disclosure relates to an electronic circuit for attenuating harmonics in a power amplifier. The circuit comprises: a printed circuit board (PCB); a first electrical track in the PCB providing a connection from a high band power input terminal of the amplifier to a battery terminal; a first capacitor connected to the first track, the high band power input terminal and a ground reference in the PCB; a first high filter choke connected to the first track and to the terminal; a second electrical track connected to a low band power input terminal of the amplifier; a circuit implemented on the PCB and connected to an output terminal of the amplifier for an output signal from the amplifier, comprising a first filter and a low pass filter, the first filter connected to a 0 ohm resistor which is connected to the low pass filter.12-13-2012
20080224771Compensation for Parasitic Coupling Between Rf or Microwave Transistors in the Same Package - Parasitic coupling effects between RF or microwave transistors provided in a common package are compensated by connecting one or more capacitors between the transistors. By connecting the capacitor(s) at a location that corresponds to the site of the coupling, the compensation is effective over a wide frequency band. This coupling-compensation makes it feasible to provide, in a common package, RF or microwave transistors intended to operate in quadrature, thereby improving performance matching and operating efficiency of the overall device.09-18-2008
330147000 PLURAL SIGNAL INPUTS 4
20090072899SHARING OPERATIONAL AMPLIFIER BETWEEN TWO STAGES OF PIPELINED ADC AND/OR TWO CHANNELS OF SIGNAL PROCESSING CIRCUITRY - A mechanism for discharging parasitic capacitance at an input of an operational amplifier, which is shared between two stages of a pipelined analog-to-digital converter and/or two channels of signal processing circuitry, before the amplifier configuration of the stages/channels is switched. The discharging act occurs when a short reset pulse is generated between two clock phases. The short reset pulse is applied to a switch connected to the operational amplifier input. When the reset pulse closes the switch, a discharge path is created and any parasitic capacitance at the operational amplifier input is discharged through the path. The discharging of the parasitic capacitance substantially mitigates the memory effect and the problems associated with the memory effect.03-19-2009
20120200355DIGITAL PREDISTORTION OF A POWER AMPLIFIER FOR SIGNALS COMPRISING WIDELY SPACED CARRIERS - Digital predistortion (“DPD”) of an RF power amplifier for signals comprising two widely spaced carrier clusters is proposed. The basis waveforms within the DPD are selected to allow for the use of a lower sampling rate. As one example, multi-carrier signals spanning 60 MHz of bandwidth may be linearized using a sample rate of 100 MHz for the DPD module and the observation path, as opposed to a sample rate exceeding 300 MHz (5 times Nyquist) used conventionally. A transmit (Tx) filter is located after the power amplifier to attenuate distortion modes exceeding the sampling rate used.08-09-2012
20080272841Systems and Methods of RF Power Transmission, Modulation, and Amplification, including Embodiments for Extending RF Transmission Bandwidth - Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.11-06-2008
20120286862Safety switching device for setting a safety-related device to a safe state - A safety switching device, with which a safety-related device, can be set into a safe state. The safety switching device has a microprocessor or microcontroller, which can set an electric drive to be protected into a safe state both if an emergency circuit breaker, protective door switch, and/or two-hand switch is activated and also if there is faulty operation of the safety-related device or electric drive. For this purpose, the microprocessor is implemented such that it can determine from at least one analog signal to be measured whether a predetermined parameter lies outside a predetermined operating range. In addition, the microprocessor can be a component of a safety device which is constructed for multiple-channel control of a safety-related electric drive. In this way, the safety switching device can respond to several safety functions independent of each other in order to set an electric drive into a safe state.11-15-2012
330116000 WITH BALANCED-TO-UNBALANCED COUPLING 3
20120188010HIGH FREQUENCY POWER AMPLIFIER - A power amplifier includes an amplifying circuit, and first through third transmission lines. The amplifying circuit amplifies an input signal having a fundamental frequency to generate a first amplified signal and a second amplified signal whose phase is opposed to the first amplified signal. The first transmission line adds a first group of phases, different in correspondence with a frequency, to the first amplified signal by using a left-handed material to generate a first transmission signal. The second transmission line adds a second group of phases, different in correspondence with a frequency, to the second amplified signal by using a right-handed material to generate a second transmission signal. The third transmission line overlaps the first and the second transmission signals to generate an output signal. The first and the second group of phases include a phase difference configured to weaken a second harmonic and a third harmonic.07-26-2012
20130135042BROADBAND LINEARIZATION BY ELIMINATION OF HARMONICS AND INTERMODULATION IN AMPLIFIERS - An amplifier device includes an initial amplifier stage configured to receive a differential input signal at a first leg and a second leg; a final amplifier stage coupled to outputs of the initial amplifier stage, the final amplifier stage including a primary signal amplifier and an error amplifier in each of the first and second legs; and wherein an output of the error amplifier of the first leg is combined with an output of the primary signal amplifier in the second leg, and an output of the error amplifier of the second leg is combined with an output of the primary signal amplifier in the first leg.05-30-2013
20120075016CALIBRATE OUTPUT MATCHING FOR CORRECT OUTPUT POWER - A calibration unit calibrates a power amplifier load impedance to achieve a nominal amplifier load impedance after the connection of one or more external elements, e.g., antenna, to improve the accuracy and effectiveness of output power calibration. The calibration unit comprises an adaptive impedance unit and a controller. The adaptive impedance unit includes first and second variable impedance elements connected between the amplifier and the external load, e.g., antenna. The controller independently calibrates the imaginary and real parts of the load impedance by respectively selecting first and second calibration values for the first and second variable impedance elements based on a reference voltage. More particularly, the controller selects calibration values for the first and second variable impedance elements from a plurality of impedance values based on a comparison between a reference voltage and the calibrated voltages produced at the output of the power amplifier responsive to the impedance values.03-29-2012
330001000 WITH DIVERSE-TYPE ART DEVICE 3
20090009243Methods and Apparatus for Controlling Leakage and Power Dissipation in Radio Frequency Power Amplifiers - A radio frequency power amplifier (RF PA) apparatus includes an RF PA and a waveform converter. The waveform converter is configured to receive a sinusoidal RF signal and generate a nonsinusoidal RF signal, which is used to drive an active device (e.g., a field effect transistor (FET) or bipolar junction transistor (BJT)) of the RF PA. The nonsinusoidal RF signal, which may comprise a square wave or a substantially-square wave signal, has signal characteristics that result in less leakage through the active device's input-output parasitic capacitance, compared to the leakage that would result if the sinusoidal RF signal was used to drive the active device. The leakage control methods and apparatus of the present invention may be advantageously employed in a variety of applications including, for example, RF polar transmitters.01-08-2009
20110279177DUPLEXER MODULE - A duplexer module prevents a transmission signal and a reception signal in the same band from interfering with each other. The duplexer module includes a transmission line, a reception line, and an antenna common line. In addition, the duplexer module includes a plurality of mounting electrodes arranged along the four sides of an outer edge of a mounting surface of a multilayer substrate. The fourth mounting electrode defining a monitoring port is disposed on a side different from a side on which each of the first mounting electrode defining a transmission port, the second mounting electrode defining a reception port, and the third mounting electrode defining an antenna port is disposed. The fourth mounting electrode defining the monitoring port is a mounting electrode used to output a signal of the monitoring line through which a portion of electrical power is transmitted from the transmission line.11-17-2011
20120274398RF AGC Control - Embodiments of the present invention may provide a signal processor with a wide gain range. The signal processor may comprise at least a discrete step gain stage and a continuous variable gain amplifier (VGA) stage. The discrete step gain stage may comprise a programmable gain amplifier (PGA) (e.g., low noise amplifiers 11-01-2012
330150000 CASCADED SIMILAR AMPLIFYING DEVICE OF DIFFERENT CHARACTERISTICS 2
20100073087Cable Television Network - There is provided a cable television network (03-25-2010
20120319776DC VOLTAGE ERROR PROTECTION CIRCUIT - This document discusses among other things apparatus and methods for protecting circuit elements from harmful voltages. In an example, an apparatus can include an amplifier configured to receive an input signal and to provide an estimate of a first output signal, a peak detector to receive the estimate and to generate a comparison signal that is active when the amplified input signal exceeds a threshold value, and a timer configured to activate a second output signal if the comparison signal is active for at least a selected time period. The timer can include a first digital input and the selected time period can be set using a state of the first digital input.12-20-2012
330005000 WITH SOLID ELEMENT WAVE PROPAGATING AMPLIFYING DEVICE 2
20080315944SPATIALLY-FED HIGH POWER AMPLIFIER WITH SHAPED REFLECTORS - A spatially-fed high-power amplifier comprises one or more shaped reflectors to reflect an initial wavefront, and an active array amplifier to amplify the reflected wavefront to generate a high-power planar wavefront. The shaped reflectors provide the reflected wavefront with substantially uniform amplitude when incident on the active array amplifier. The initial wavefront may be a substantially spherical wavefront, and the shaped reflectors may compensate for any amplitude taper of the initial wavefront to provide the reflected wavefront with substantially uniform amplitude components for incident on the active array amplifier. In some embodiments, the shaped reflectors may also contour the illumination to fit the shape of the active array amplifier to help minimize spillover.12-25-2008
20120200349RF POWER AMPLIFIER WITH SPECTRALLY GROUPED NANOSIZED SWITCHES - The invention describes a radio frequency (=RF) power amplifier (08-09-2012
330400500 PARAMETRIC AMPLIFIERS 2
20090219086AMPLIFIER, AMPLIFYING METHOD, AND FILTER - An amplifier is provided which includes: a first variable capacitance device of which capacitance is variable, a second variable capacitance device of which capacitance is variable, electrically connected to the first variable capacitance device, and of an inverse conductivity type from the first variable capacitance device, and a first input unit for selectively inputting a bias voltage and a voltage signal to the first variable capacitance device and the second variable capacitance device, wherein, in the event that the bias voltage and the voltage signal are input to the first variable capacitance device and the second variable capacitance device, the capacitance of the first variable capacitance device and the second variable capacitance device is taken as a first value, and wherein the voltage signal is amplified with the capacitance of the first variable capacitance device and the second variable capacitance device as a second value smaller than the first value.09-03-2009
20120098594DISPERSION-ENGINEERED TRAVELING WAVE KINETIC INDUCTANCE PARAMETRIC AMPLIFIER - A traveling wave kinetic inductance parametric amplifier comprises a superconducting transmission line and a dispersion control element. The transmission line can include periodic variations of its dimension along its length. The superconducting material can include a high normal state resistivity material. In some instances the high normal state resistivity material includes nitrogen and a metal selected from the group consisting of titanium, niobium and vanadium. The traveling wave kinetic inductance parametric amplifier is expected to exhibit a noise temperature below 100 mK/GHz.04-26-2012
330044000 WITH ELECTRON BEAM TUBE AMPLIFYING DEVICE 1
20110199155Controlling the Performance of a Thermionic tube - Controlling the performance of the thermionic tube (08-18-2011
330043000 WITH TRAVELING WAVE-TYPE TUBE 1
20120268201Very High Efficiency Flexible Travelling Wave Amplifier - A travelling wave tube amplifier includes: a travelling wave tube comprising a cathode, a helix, an RF input, an RF output, and a plurality of collectors, and an electronic power conditioner providing power supply and electrode polarization to said travelling wave tube, wherein said electronic power conditioner comprises flexibility control means allowing to adjust, via control commands sent through a databus, the helix to cathode voltage and the collector voltages.10-25-2012
330148000 PLURAL SIGNAL OUTPUTS 1
20130214859SWITCH CONFIGURATION FOR DEFAULT-ON N-WAY ACTIVE SPLITTERS - An apparatus comprising an amplifier and a switch network. The amplifier may be configured to generate a plurality of output signals in response to an input signal. The switch network may be configured to provide (i) a first path when a power signal is not present and (ii) a second path when said power signal is present. The first path may activate a first of the plurality of output signals. The second path may activate all of the plurality of output signals. An impedance may be connected to the amplifier only when the first path is activated.08-22-2013
330063000 WITH MAGNETIC MEANS AMPLIFYING DEVICE 1
20100321106AMPLIFIER - This invention relates to an amplifier, especially an amplifier having electrical and magnetic input excitations.12-23-2010
330118000 INCLUDING A PUSH-PULL STAGE 1
20100171552Push-Pull Linear Hybrid Class H Amplifier - Several push-pull linear hybrid class H amplifiers are disclosed. A split power rail provides a positive supply rail and a negative supply rail in response to a power supply control voltage. A push-pull amplifier stage is powered by the positive and negative supply rails. The amplifier stage receives an input signal and provides a corresponding amplified output signal. A power supply control circuit provides the power supply control voltage in response to the smaller of the positive and negative supply rails, and the input signal.07-08-2010
330011000 WITH D.C. REINSERTION CIRCUIT 1
20100271120DISTRIBUTED THRESHOLD ADJUSTMENT FOR HIGH SPEED RECEIVERS - According to one general aspect, an apparatus may include a terminal configured to receive an analog input signal. In various embodiments, the apparatus may also include a multistage amplifier configured to amplify the analog input signal by an amount of gain. In some embodiments, the apparatus may include a distributed threshold adjuster interspersed between the stages of the multistage amplifier configured to adjust the DC voltage of the analog input signal to facilitate a decision by an analog-to-digital converter (ADC). In one embodiment, the apparatus may include the ADC configured to convert the amplified analog input signal to a digital output signal.10-28-2010
330143000 THERMALLY RESPONSIVE IMPEDANCE 1
20130113558AMPLIFIER THERMAL MANAGEMENT - A thermally regulated amplifier system includes an amplifier unit, a temperature-sensing unit and a controller. The amplifier unit includes a power amplifier that has an adjustable gain function. The controller receives temperature readings from the temperature-sensing unit, computes the gain G(n) of the amplifier unit, and provides the computed gain of the amplifier G(n) to the power amplifier unit.05-09-2013
330006000 WITH HALL EFFECT TYPE MEANS 1
20100001791CURRENT AMPLIFYING ELEMENT AND CURRENT AMPLIFICATION METHOD - A current amplifying element that operates at a higher speed than conventional semiconductor devices is provided. An input current flows through an input current path 01-07-2010
330117000 WITH UNBALANCED-TO-BALANCED COUPLING 1
20110187451POWER AMPLIFIER - There is provided a power amplifier that can reduce power consumption by selectively turning a plurality of amplifiers on or off according to the power of a signal to be transmitted. A power amplifier according to an aspect of the invention may include: a first amplification section amplifying an input signal by a predetermined gain; a second amplification section having a plurality of amplification units re-amplifying the input signal, amplified by the first amplification section, by predetermined gains; and a switch section supplying or cutting off power to the plurality of amplification units according to an switching signal to selectively operate the plurality of amplification units.08-04-2011
330060000 HAVING MAGNETOSTRICTIVE-TYPE AMPLIFYING DEVICE 1
20090322419AMPLIFYING APPARATUS USING MAGNETO-RESISTIVE DEVICE - An amplifying apparatus includes a magneto-resistive device which has a magnetic free layer, a magnetic pinned layer having a magnetic moment larger than that of the magnetic free layer, and an intermediate layer provided in between the magnetic free layer and the magnetic pinned layer. The amplifying apparatus has a first electrode layer provided in a magnetic free layer side of the magneto-resistive device, and a second electrode layer provided in a magnetic pinned layer side of the magneto-resistive device. The amplifying apparatus further includes a direct-current bias power-source for applying a direct-current bias to the magneto-resistive device, and a load resistor. The amplifying apparatus continually causes the change of a magnetization direction of the magnetic free layer to make the magneto-resistive device show negative resistance, and thereby amplifies an input signal.12-31-2009

Patent applications in class Amplifiers

Patent applications in all subclasses Amplifiers