| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 06/03/2009 | CN101447765A Circuit and method for compensating for nonlinear distortion of power amplifier |
| 06/03/2009 | CN100495907C Apparatus and method of dynamically regulating and looking for tabular interval for linearizing a power amplifier |
| 06/03/2009 | CN100495512C Driving apparatus of a liquid crystal display |
| 06/02/2009 | US7543253 Method and apparatus for compensating for temperature drift in semiconductor processes and circuitry |
| 06/02/2009 | US7542880 Time weighted moving average filter |
| 06/02/2009 | US7542879 Virtual sensor based control system and method |
| 06/02/2009 | US7542860 Method and device for detecting the location of a pulse-type mechanical effect on a system part |
| 06/02/2009 | US7542519 Radio frequency transmitter and method therefor |
| 06/02/2009 | US7542518 Predistortion apparatus and method for compensating for a nonlinear distortion characteristic of a power amplifier using a look-up table |
| 06/02/2009 | US7541873 High frequency amplifier configuration for improved feedback capacitance neutralization |
| 06/02/2009 | US7541868 Delay modulator pre-distortion circuit for an amplifier |
| 06/02/2009 | US7541864 Power amplifier and pulse-width modulated amplifier |
| 05/28/2009 | WO2009067054A1 A composite amplifier, a radio terminal and a method for improving the efficiency of the composite amplifier |
| 05/28/2009 | WO2009066353A1 Power amplifier |
| 05/28/2009 | WO2009066194A1 Power save mode for audio interface drive amplifier |
| 05/28/2009 | US20090137213 Adaptive radio transceiver with offset pll with subsampling mixers |
| 05/28/2009 | US20090134942 Radio frequency amplifier with constant gain setting |
| 05/28/2009 | US20090134940 Balanced amplifier and electronic circuit |
| 05/27/2009 | EP2062350A1 Switch-less bidirectional amplifier |
| 05/27/2009 | EP2062349A2 Amplifier feedback and bias configuration |
| 05/27/2009 | EP1611724B1 Method and apparatus for performing linearization in a quadrature transmitter |
| 05/27/2009 | EP1364457B1 Circuit for linearizing electronic devices |
| 05/27/2009 | EP1327308A4 System for closed loop power control using a linear or a non-linear power amplifier |
| 05/27/2009 | CN201248028Y Triggering circuit, audio power amplifier system and television set |
| 05/27/2009 | CN201247955Y Direct-current power supply filter circuit capable of restraining power-supply interference |
| 05/27/2009 | CN101442294A Amplifying circuit and method for improving linearity thereof |
| 05/27/2009 | CN101442293A 2.4GHz low noise amplifier circuit capable of resisting process change |
| 05/27/2009 | CN101442292A Radio-frequency amplifier digital bias circuit, method and communication equipment |
| 05/27/2009 | CN101442205A Electrostatic discharge protection circuit and method |
| 05/27/2009 | CN100492894C Circuit for parallel operation of doherty amplifiers |
| 05/27/2009 | CN100492891C Digital amplifier |
| 05/27/2009 | CN100492889C Timing adjusting method and timing adjusting apparatus |
| 05/27/2009 | CN100492888C Predistorter for phase modulated signals with low peak to average ratios |
| 05/27/2009 | CN100492887C Power amplifier pre-distorter training method |
| 05/27/2009 | CN100492886C Transmission amplifier |
| 05/27/2009 | CN100492885C Multiband low noise amplifier |
| 05/27/2009 | CN100492884C Monolithically integrated power amplifier device |
| 05/26/2009 | US7539600 Transmitter |
| 05/26/2009 | US7538632 Method and apparatus for controlling adaptive circuits |
| 05/26/2009 | US7538612 Control circuit for diode based RF circuits |
| 05/26/2009 | US7538609 Amplifier, transmitter arrangement having an amplifier and method for amplifying a signal |
| 05/26/2009 | US7538606 Constant bandwidth DC offset correction in an amplifier |
| 05/26/2009 | US7538605 Amplifier device capable of reducing offset voltage |
| 05/26/2009 | US7538604 Amplifier feedback switch configuration with improved PSRR |
| 05/22/2009 | WO2009065068A2 Switching amplifiers |
| 05/22/2009 | WO2009063276A1 Amplifier circuit |
| 05/22/2009 | WO2009044353A3 A distributed low noise amplifier |
| 05/22/2009 | WO2009009652A3 Segmented power amplifier |
| 05/21/2009 | US20090128236 High Efficiency Amplification |
| 05/21/2009 | US20090128233 Shared linearity maintenance in power amplifiers |
| 05/20/2009 | DE102004015611B4 Vorrichtung und Verfahren zur Offset-Kompensation Apparatus and method for offset compensation |
| 05/20/2009 | CN101438492A Multi-mode power amplifier with high efficiency under backoff operation |
| 05/20/2009 | CN101436868A Digital baseband system for compensating for analog radio transmitter impairments |
| 05/20/2009 | CN101436847A Microwave low-waveband ultra-minitype frequency selection amplifying die set |
| 05/20/2009 | CN101436701A Microwave low-waveband ultra-minitype balanced amplifier |
| 05/20/2009 | CN100490330C Analog-to-digital converter |
| 05/20/2009 | CN100490311C Miller compensation based chopped wave amplifer and nested chopper amplifiers |
| 05/20/2009 | CN100490310C Chopped wave automatic zero-stabilizing current-mode instrumentation amplifier |
| 05/20/2009 | CN100490308C Method and system for improving the power amplifier linearity |
| 05/20/2009 | CN100490307C Signal processing circuit, base station and method for clearing intermodulation product |
| 05/20/2009 | CN100490306C Amplifier circuit for AM broadcasting |
| 05/20/2009 | CN100490305C Sleeve type amplifier |
| 05/19/2009 | US7536281 Method for compensating for a contaminated calibration target used in calibrating a scanner |
| 05/19/2009 | US7536153 Activation signal output circuit having multiple amplifier circuits |
| 05/19/2009 | US7535310 Distortion compensation circuit |
| 05/19/2009 | US7535305 Quiescent current detecting circuit for class AB amplifier |
| 05/19/2009 | US7535303 Active LC filter damping circuit with galvanic isolation |
| 05/19/2009 | US7535299 High-frequency amplification circuit |
| 05/19/2009 | US7535298 Arrangement and a method relating to signal predistortion |
| 05/19/2009 | US7535295 Chopper stabilized amplifiers combining low chopper noise and linear frequency characteristics |
| 05/19/2009 | US7535294 Offset cancellation amplifier, display employing the offset cancellation amplifier and method for controlling the offset cancellation amplifier |
| 05/19/2009 | US7535293 Preamplifier circuits and methods of calibrating an offset in the same |
| 05/19/2009 | US7535267 Output circuit and operational amplifier |
| 05/19/2009 | CA2286531C Feedforward amplification system having mask detection compensation |
| 05/14/2009 | WO2009061817A2 Apparatus and method for low power rail-to- rail operational amplifier |
| 05/14/2009 | WO2009060652A1 Power amplifier and radio wave transmitter having the same |
| 05/14/2009 | WO2009060264A1 Integrated circuit having harmonic termination circuitry |
| 05/14/2009 | WO2009060095A1 Electronic circuit with cascode amplifier |
| 05/14/2009 | US20090124219 High linearity, high efficiency power amplifier with DSP assisted linearity optimization |
| 05/14/2009 | US20090121788 System and method for self-cancellation of nth-order intermodulation products |
| 05/14/2009 | DE102007052440A1 Verfahren und Anordnung eines Messverstärkers zur Korrektur von Eingangssignalen Method and arrangement of a measuring amplifier for correction of input signals |
| 05/13/2009 | EP2058947A2 Broadband reciprocal active balun structure |
| 05/13/2009 | EP2058944A1 Transconductance amplifier |
| 05/13/2009 | EP1982411A4 Notch filter for ripple reduction in chopper stabilized amplifiers |
| 05/13/2009 | EP1714383A4 Methods and systems for signal amplification through envelope removal and restoration |
| 05/13/2009 | CN201238284Y Power-on/off mute circuit and set-top box with the same |
| 05/13/2009 | CN101431604A Image signal amplifying circuit and amplifying semiconductor integrated circuit |
| 05/13/2009 | CN101431316A Double-frequency band inductor multiplexing radio frequency CMOS low-noise amplifier |
| 05/13/2009 | CN101431313A Amplifying circuit and method for improving linearity by using grid non-linear capacitor |
| 05/13/2009 | CN100488063C Distortion compensation apparatus |
| 05/13/2009 | CN100488038C RF power amplifier |
| 05/13/2009 | CN100488037C Device for correcting input offset voltage |
| 05/13/2009 | CN100488035C Transistor series connection single end direct coupled class-A power amplification circuit |
| 05/13/2009 | CN100488034C CMOS self-adaptive biasing circuit |
| 05/13/2009 | CN100488033C Single slice high-gain low-noise amplifier |
| 05/13/2009 | CN100488032C Method for restraining noises of digital audio frequency power amplifier |
| 05/13/2009 | CN100488031C Method for improving efficiency of power amplifier |
| 05/13/2009 | CN100488030C Radio frequency amplification device, power supply unit and control method thereof |
| 05/12/2009 | US7533005 System and method for checking a reference plane of a signal trace in a PCB |
| 05/12/2009 | US7532680 Multi-mode radio frequency transmitter |