| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 12/26/2012 | CN102843101A Variable gain low-noise amplifier |
| 12/26/2012 | CN102840920A Biasing circuit and temperature compensation low-frequency amplification circuit for microwave radiometer |
| 12/26/2012 | CN101438492B Multi-mode power amplifier with high efficiency under backoff operation |
| 12/26/2012 | CN101267100B Exception protection device for negative and positive dual power supply circuit |
| 12/25/2012 | US8340791 Process device with sampling skew |
| 12/25/2012 | US8339195 Circuits and methods for calibrating offset in an amplifier |
| 12/20/2012 | WO2012173112A1 Amplifier and signal processing device |
| 12/20/2012 | WO2012172627A1 Audio power amplifier |
| 12/20/2012 | WO2012148077A3 Digital condenser microphone having preamplifier with variable input impedance and method of controlling variable input impedance of preamplifier |
| 12/20/2012 | WO2012125657A3 Apparatus and methods for capacitive load reduction |
| 12/20/2012 | US20120319782 Class e power amplifier |
| 12/20/2012 | US20120319776 Dc voltage error protection circuit |
| 12/20/2012 | US20120319770 Output Buffer Circuit Capable of Enhancing Stability |
| 12/20/2012 | US20120319718 Signal transmission apparatus and semiconductor test apparatus using the same |
| 12/20/2012 | DE112009005411T5 Leistungsverstärkerschaltung und Anpassungsschaltung A power amplifier circuit and adaptation circuit |
| 12/20/2012 | DE102012105260A1 Breitband-Doherty-Verstärkerschaltung mit Konstantimpedanzkombinierer High-Doherty amplifier circuit with Konstantimpedanzkombinierer |
| 12/20/2012 | DE102007021582B4 Sigma-Delta-Modulator und darauf bezogenes Ausgangsratenreduzierungsverfahren Sigma-delta modulator and output rate reduction methods related thereto |
| 12/20/2012 | CA2833248A1 Amplifier and signal processing device |
| 12/19/2012 | EP2536025A1 Power amplifier device and power amplifier circuit |
| 12/19/2012 | EP2536024A1 Doherty power amplifier device and power amplification method therefor |
| 12/19/2012 | EP2536023A2 Method and apparatus for biasing rail to rail DMOS amplifier output stage |
| 12/19/2012 | EP2534755A1 Wide band lna with noise canceling |
| 12/19/2012 | CN202617072U Multi-standard and multi frequency range low noise amplifier |
| 12/19/2012 | CN202617069U Controllable gain amplifier |
| 12/19/2012 | CN202617067U Push-pull amplifier circuit |
| 12/19/2012 | CN102835026A Amplifier circuit, detector arrangement and method for operating an amplifier |
| 12/19/2012 | CN102835025A Low output impedance RF amplifier |
| 12/19/2012 | CN102832893A D-type power amplifier |
| 12/19/2012 | CN102832890A Radio frequency low-temperature low-noise amplifier system of thermoelectric refrigeration |
| 12/19/2012 | CN102832889A Method, device and system for adjusting radio frequency load output |
| 12/19/2012 | CN102832888A Driving amplifier for coriolis mass flow meter |
| 12/19/2012 | CN102832887A High-fidelity D type voice frequency amplifier |
| 12/19/2012 | CN102832886A Wideband doherty amplifier circuit having constant impedance combiner |
| 12/19/2012 | CN102122920B Adaptive distributed type optical fiber temperature-measuring laser detection amplifier |
| 12/19/2012 | CN101951003B 充电管理装置 Charging management device |
| 12/19/2012 | CN101409572B Module for matching single or multi-system signal |
| 12/18/2012 | US8335665 Apparatus and method for high resolution measurements for downhole tools |
| 12/18/2012 | US8335663 Signal acquisition system and method |
| 12/18/2012 | US8334723 Distortion compensation amplification device |
| 12/18/2012 | US8334721 Integrated upstream amplifier for cable modem and cable set-top boxes |
| 12/13/2012 | WO2012168989A1 Operational amplifier |
| 12/13/2012 | WO2012168801A1 Predistorter for a multi-antenna transmitter |
| 12/13/2012 | WO2012168379A1 High output power digital tx |
| 12/13/2012 | US20120314880 Stereo Headset Amplifier |
| 12/13/2012 | US20120313713 Switching Power Supply |
| 12/13/2012 | US20120313711 Device for neutralizing a signal obtained by modulating, on to a high frequency carrier, a useful signal delivered by a system |
| 12/13/2012 | US20120313710 Performance optimization of power amplifier |
| 12/13/2012 | US20120313705 Method for introducing feedback in a FET amplifier |
| 12/13/2012 | US20120313700 Predistorter For A Multi-Antenna Transmitter |
| 12/13/2012 | US20120313699 System and method for controlling radio frequency transmissions from an electronic device |
| 12/12/2012 | EP2533428A1 Multi-standard wireless transmitter |
| 12/12/2012 | EP2533420A1 Performance optimization of power amplifier |
| 12/12/2012 | EP2533419A1 System for amplifying signals generated by a signal-generation unit of a satellite |
| 12/12/2012 | EP2533418A1 Device for neutralising a signal obtained by high-frequency transposition of a useful signal provided by a device |
| 12/12/2012 | EP2532306A1 Non-contact sensor for detecting the electrocardiogram of a user |
| 12/12/2012 | EP2532090A1 Method and arrangement for driving a microphone |
| 12/12/2012 | EP2532089A1 Radio-frequency (rf) amplifier circuits and related techniques |
| 12/12/2012 | CN202603115U Servo amplifier |
| 12/12/2012 | CN202602595U Charge amplifier |
| 12/12/2012 | CN202602594U Charge amplifier |
| 12/12/2012 | CN102823142A Circuit and method for interference reduction |
| 12/12/2012 | CN102823128A Digital amplifier |
| 12/12/2012 | CN102822950A Compound semiconductor device and manufacturing method for same |
| 12/12/2012 | CN102820857A Transimpedance amplifier with broad band and high gain, design method and amplifier chip |
| 12/12/2012 | CN102820856A RF power amplifier and RF power module using the same |
| 12/12/2012 | CN102820855A 电源控制电路 The power control circuit |
| 12/12/2012 | CN102820854A Amplifier and method for improving precision of amplifier |
| 12/12/2012 | CN101873104B RF power amplifier using different supply voltages and operation method thereof |
| 12/12/2012 | CN101842977B Automatic power source configuration |
| 12/12/2012 | CN101834576B Multimode tunable CMOS (Complementary Metal Oxide Semiconductor) differential low noise amplifier |
| 12/11/2012 | US8330842 Amplifier control device and recording non-transitory medium |
| 12/11/2012 | US8330547 Gain control linearity in an RF driver amplifier transmitter |
| 12/11/2012 | US8330540 Model based distortion reduction for power amplifiers |
| 12/11/2012 | US8330539 Dynamic switchable mode dual bridge power amplifier |
| 12/11/2012 | US8330538 Self-oscillating audio amplifier and method for restraining the improved self-oscillating audio amplifier |
| 12/11/2012 | US8330537 Low noise, high CMRR and PSRR input buffer |
| 12/11/2012 | US8330536 Differential reference interface with low noise offset cancellation |
| 12/06/2012 | WO2012166060A1 Method and device for predistortion of nonlinear wideband amplifier |
| 12/06/2012 | WO2012164951A1 Transmitter and signal processing method |
| 12/06/2012 | WO2012164905A1 Vswr measurement circuit, wireless communication device, vswr measurement method and recording medium in which vswr measurement program is stored |
| 12/06/2012 | WO2012163875A1 Envelope path processing for envelope tracking amplification stage |
| 12/06/2012 | WO2012163874A1 Time alignment for an amplification stage |
| 12/06/2012 | WO2012020144A3 Switch mode power supply for envelope tracking |
| 12/06/2012 | US20120306838 Semiconductor device and electronic apparatus using the same |
| 12/06/2012 | US20120306575 Switched-capacitor dc blocking amplifier |
| 12/06/2012 | US20120306573 Signal processing arrangement and signal processing method |
| 12/06/2012 | US20120306571 Voltage output device having an operational amplifier |
| 12/05/2012 | EP2530834A1 RF amplifier with open circuit input off-state |
| 12/05/2012 | EP2530833A2 RF amplifier with open circuit output off-state |
| 12/05/2012 | EP2530832A1 Method and device for digitatl pre-distortion precessing |
| 12/05/2012 | EP2530831A1 Audio amplifier circuit and method of operation thereof |
| 12/05/2012 | EP2529481A1 Instrumentation amplifier calibration method, system and apparatus |
| 12/05/2012 | CN202586881U Radio-frequency power amplifier hot-backup system |
| 12/05/2012 | CN202586878U Digital feed-forward amplifier |
| 12/05/2012 | CN202586877U Passive audio amplifier |
| 12/05/2012 | CN202586876U Difference frequency eliminating circuit, pulse width modulation signal generation circuit and amplifier circuit |
| 12/05/2012 | CN202583057U Probe signal processing circuit for infrared gas sensor |
| 12/05/2012 | CN102812634A Pop-up Noise Reduction In A Device |
| 12/05/2012 | CN102812633A Parallel Correction Amplifier |
| 12/05/2012 | CN102811026A Class D audio power amplifier for noise suppression and audio signal processing method thereof |