| 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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| 05/26/2011 | DE102009041937A1 Amplifier for electrostatic discharge protection circuit, has current limiting device reducing output current at output to current value based on determined condition of input signal relative to determined condition of output |
| 05/25/2011 | EP2324568A1 Arrangement for calibrating the quiescent operating point of a push-pull amplifier |
| 05/25/2011 | EP1356585B1 Apparatus and methods for monitoring and controlling power amplifier linearity using detected fundamental and harmonic components |
| 05/25/2011 | CN201846310U Impulse power amplifier |
| 05/25/2011 | CN201846308U Multi-closed-loop cooperative amplifier circuit |
| 05/25/2011 | CN201846307U Medium-intensity magnetic sensor |
| 05/25/2011 | CN102077462A Pre-distortion method and device to enhance power utility of power amplifiers in wireless digital communication applications |
| 05/25/2011 | CN102075469A Estimation method for signal delay time of digital pre-distortion system |
| 05/25/2011 | CN102075154A Low-power consumption programmable gain amplifier device |
| 05/25/2011 | CN102075151A Complementary circulation folding gain bootstrapping operational amplifier circuit with preamplifier |
| 05/25/2011 | CN102075148A Over-temperature protection circuit for radio frequency power amplifier |
| 05/25/2011 | CN102075147A Radio-frequency power amplifier method and feed-forward power amplifier |
| 05/25/2011 | CN102075146A G class audio frequency amplification system and method |
| 05/25/2011 | CN101806620B Photoelectric detection preamplifying circuit |
| 05/25/2011 | CN101449458B Amplifying circuit and method thereof |
| 05/25/2011 | CN101420208B Variable gain amplifier including series-coupled cascode amplifiers |
| 05/25/2011 | CN101416382B Method and equipment for reducing frequency memory effect of RF power amplifier |
| 05/24/2011 | US7948311 Power series predistorter and control method thereof |
| 05/24/2011 | US7948310 System and a method for signal processing |
| 05/24/2011 | US7948309 DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same |
| 05/19/2011 | WO2011060323A1 Cascaded amplifiers with transformer-based bypass mode |
| 05/19/2011 | WO2011058843A1 Amplifier, distortion compensation circuit, and distortion compensation method |
| 05/19/2011 | WO2011058803A1 Distortion compensation circuit |
| 05/19/2011 | WO2011058709A1 Transmission circuit and communication device |
| 05/19/2011 | WO2011058197A1 An adaptive digital pre-distortion method and device to enhance the power utility of power amplifiers in wireless digital communication applications |
| 05/19/2011 | US20110115559 System for reducing distortion in an electronic circuit using nonlinear feedback |
| 05/19/2011 | US20110115558 Dual band high frequency amplifier using composite right/left handed transmission line |
| 05/19/2011 | DE102009053622A1 Verstärkeranordnung mit gesteuerter Rückführung von Verlustleistung Amplifier arrangement with controlled return of power loss |
| 05/18/2011 | EP2323255A1 Power amplifier circuit for an input signal and transmission system including such a circuit |
| 05/18/2011 | EP2323254A1 A plop-free amplifier |
| 05/18/2011 | EP2323253A1 Doherty power amplifiers |
| 05/18/2011 | EP2322108A1 Class resonant-H electrosurgical generators |
| 05/18/2011 | EP2321901A1 Hybrid class amplifier |
| 05/18/2011 | EP2321899A1 Method of and circuit for reducing distortion in a power amplifier |
| 05/18/2011 | EP2321898A1 Adaptive bias current generation for switched-capacitor circuits |
| 05/18/2011 | EP2321621A2 Wireless telemetry electronic circuitry for measuring strain in high-temperature environments |
| 05/18/2011 | CN201839265U Tracking integral circuit based on pulse width modulation |
| 05/18/2011 | CN201839258U Sleep activation control amplifier |
| 05/18/2011 | CN1694385B Direct regulation laser optical transfer system |
| 05/18/2011 | CN1592093B Frequency-selective phase/delay control for an amplifier |
| 05/18/2011 | CN102067444A Improved filter for switched mode power supply |
| 05/18/2011 | CN102067443A Amplifier with gain expansion stage |
| 05/18/2011 | CN102064777A Amplification circuit |
| 05/18/2011 | CN102064774A Implementation method of power amplifying circuit and power amplifying device |
| 05/18/2011 | CN102064772A Power amplifier device and sound field calibration method thereof |
| 05/18/2011 | CN102064771A Temperature impervious radio device amplifier output power control |
| 05/18/2011 | CN102064770A Remote radio unit and method for regulating drain voltage thereof |
| 05/18/2011 | CN101557200B Power amplifier capable of regulating noise |
| 05/18/2011 | CN101416383B Method for compensating signal distortion of composite amplifier |
| 05/18/2011 | CN101414805B Semiconductor integrated circuit with variable gain amplifier |
| 05/18/2011 | CN101355345B Power amplifier |
| 05/17/2011 | US7945606 Method and apparatus for evaluating a time varying signal |
| 05/17/2011 | US7945428 Multi-gain adaptive linear processing and gated digital system for use in flow cytometry |
| 05/17/2011 | US7945220 LINC power transmitter |
| 05/17/2011 | US7944994 Data converter and data conversion method, and transmitter circuit, communications device and electronic device using the same |
| 05/17/2011 | US7944306 Dual bias control circuit |
| 05/17/2011 | US7944296 Low power mode amplification with a transformer output matching and a virtual ground |
| 05/17/2011 | US7944295 Predistorter |
| 05/17/2011 | US7944292 Method and apparatus to remove the DC component of a feedback signal |
| 05/17/2011 | US7944291 Power amplifier having parallel amplification stages and associated impedance matching networks |
| 05/17/2011 | US7944290 Trans-impedance amplifier |
| 05/17/2011 | US7944288 Switched-capacitor amplifier arrangement having a low input current |
| 05/17/2011 | US7944287 Low-noise, wide offset range, programmable input offset amplifier front end and method |
| 05/17/2011 | CA2484855C Method and apparatus for predistortion training in an amplifier utilizing predistortion |
| 05/12/2011 | WO2011055964A2 Doherty amplifier |
| 05/12/2011 | WO2011054403A1 Impedance circuit and method for signal transformation |
| 05/12/2011 | US20110109392 Low noise amplifier |
| 05/12/2011 | US20110109391 Power Amplifier with Stabilising Network |
| 05/12/2011 | US20110109385 Digital Compensation for Parasitic Distortion Resulting from Direct Baseband to RF Modulation |
| 05/12/2011 | US20110109384 Wireless Signal Corrective Pre-Distortion using Linearly Interpolated Filter Coefficients Derived from an Amplifier Sample Set that is Representative of Amplifier Nonlinearlity |
| 05/11/2011 | EP2320563A1 Power amplification device, and transmission device and communication device using same |
| 05/11/2011 | EP2320562A1 Calibration of signal processing apparatus |
| 05/11/2011 | EP2320561A1 Power amplification device, and transmission device and communication device both using thereof |
| 05/11/2011 | EP2047592B1 Fast charge circuit for use in amplifiers |
| 05/11/2011 | EP1825592B1 A power multiplier apparatus and method |
| 05/11/2011 | EP1552618B1 Low noise switching voltage regulator |
| 05/11/2011 | CN201830210U Linear isolating and amplifying device for analog signals |
| 05/11/2011 | CN201830209U Multipath differential compensation amplifying circuit suitable for high-orbit platforms |
| 05/11/2011 | CN201830205U TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) digital predistortion power amplifier |
| 05/11/2011 | CN201830204U 功率放大器 PA |
| 05/11/2011 | CN1601892B Distortion-compensated amplifier using predistortion technique |
| 05/11/2011 | CN102055422A Circuit for reducing flicker noise of MOS tube |
| 05/11/2011 | CN102055421A Differential to single-end amplifier with gain control |
| 05/11/2011 | CN102055419A High-efficiency linear power amplifier for underwater acoustic communication |
| 05/11/2011 | CN102055418A High perceived audio quality class d amplifier |
| 05/11/2011 | CN102055412A Power amplifier protective circuit, communication equipment and method |
| 05/11/2011 | CN102055411A Power amplifier linearization correcting circuit and method based on multi-channel feedback |
| 05/11/2011 | CN102055410A Low-power-consumption current-limiting circuit without operational amplifier |
| 05/11/2011 | CN102055409A Multi-stage CMOS power amplifier |
| 05/11/2011 | CN101471634B Output stage circuit and operational amplifier applying the same |
| 05/11/2011 | CN101379695B Method and system for transmitter envelope delay calibration |
| 05/11/2011 | CN101369803B Differential amplifier circuit and drive circuit of liquid crystal display unit using the same |
| 05/11/2011 | CN101170298B Bias circuit |
| 05/11/2011 | CN101060186B Amplifying device and radio communication circuit |
| 05/10/2011 | US7941297 Noise measurement in video images |
| 05/10/2011 | US7941107 High linearity, high efficiency power amplifier with DSP assisted linearity optimization |
| 05/10/2011 | US7940940 Muting circuit and semiconductor integrated circuit |
| 05/10/2011 | US7940125 Power amplifier, power amplifier circuit and power amplifying method |
| 05/10/2011 | US7940119 Multiple-input and multiple-output amplifier using mutual induction in the feedback network |
| 05/10/2011 | US7940106 Apparatus for generating a correction signal |