| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 03/21/2013 | WO2012158423A3 Apparatus and methods for biasing power amplifiers |
| 03/21/2013 | US20130071106 Optical receiver |
| 03/21/2013 | US20130070836 System and Method for Generating a Radio Frequency Pulse-width Modulated Signal |
| 03/21/2013 | US20130070365 Current sensor comprising differential amplifier biased by leakage current |
| 03/21/2013 | US20130069728 Automatic bias operational amplifying circuit and system |
| 03/21/2013 | US20130069727 Transimpedance Amplifier and Method Thereof |
| 03/21/2013 | US20130069726 Power amplification apparatus |
| 03/21/2013 | US20130069725 Rf power amplifier |
| 03/21/2013 | US20130069724 Supply independent biasing circuit |
| 03/21/2013 | US20130069723 Power amplification circuit having transformer |
| 03/21/2013 | US20130069722 Multi-band amplifier and method of amplifying multi-band |
| 03/21/2013 | US20130069721 Amplifying circuit |
| 03/21/2013 | US20130069720 Apparatus and methods for electronic amplification |
| 03/21/2013 | US20130069718 Apparatus and methods for electronic amplification |
| 03/21/2013 | US20130068935 Light receiving circuit |
| 03/20/2013 | EP2571161A1 Amplifier |
| 03/20/2013 | EP2569860A1 Area efficient concurrent matching transceiver |
| 03/20/2013 | CN202818239U Noise suppression circuit and audio frequency amplifier with noise suppression function |
| 03/20/2013 | CN202818238U High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier |
| 03/20/2013 | CN202818237U L-band wideband power amplifier |
| 03/20/2013 | CN202818236U High tone-quality audio output circuit |
| 03/20/2013 | CN202818235U Interference-suppressing radio frequency transmission circuit |
| 03/20/2013 | CN202818231U Symmetrical double-conversion type radio frequency power amplifier |
| 03/20/2013 | CN102986135A Narrow-band tunable radio frequency (RF) power amplifiers and related methods |
| 03/20/2013 | CN102983864A Loop filter and quantizer and digital-to-analog converter and operational amplifier |
| 03/20/2013 | CN102983825A Category D amplifier chip |
| 03/20/2013 | CN102983824A Self-adaptive predistortion power amplifier |
| 03/20/2013 | CN102983823A Radio-frequency power amplifying integrated circuit and mobile terminal using same |
| 03/20/2013 | CN102983822A Power amplifier |
| 03/20/2013 | CN102983821A High-frequency power amplifying device |
| 03/20/2013 | CN102983817A High-gain wideband low-noise amplifier |
| 03/20/2013 | CN102111114B Design method for reverse class-F power amplifier based on 3/4 spiral virtual ground structure |
| 03/20/2013 | CN102111112B Radio-frequency power amplifier and a front-end transmitter |
| 03/20/2013 | CN102098010B Multifunctional hydraulic servo power amplifier |
| 03/20/2013 | CN102082552B Driver with controlled slope |
| 03/20/2013 | CN102064766B 噪声发生器 Noise Generator |
| 03/20/2013 | CN101820098B Automobile side window glass printed antenna amplifier system |
| 03/20/2013 | CN101710824B Class D amplifier |
| 03/20/2013 | CN101647199B Method and system for increasing sampling frequency for switching amplifiers |
| 03/20/2013 | CN101604961B System and a method for power amplifier having an integrated passive device |
| 03/20/2013 | CN101594324B Method for generating pre-distorted signals |
| 03/20/2013 | CN101416460B Frequency limiting amplifier of frequency conversion module |
| 03/20/2013 | CN101399522B Multi-input operational amplifier circuit, digital/analog converter using same |
| 03/20/2013 | CN101373960B Output limiting circuit, class d power amplifier and audio equipment |
| 03/19/2013 | US8400235 Active hybrids for antenna systems |
| 03/19/2013 | US8400222 Electronic circuits including a MOSFET and a dual-gate JFET |
| 03/19/2013 | US8400221 Method and apparatus for biasing an amplifier |
| 03/19/2013 | US8400220 Quiescent current control for class AB output stages |
| 03/19/2013 | US8400219 Analog circuits having improved transistors, and methods therefor |
| 03/19/2013 | US8400218 Current mode power amplifier providing harmonic distortion suppression |
| 03/19/2013 | US8400217 RF power amplifier circuit with mismatch tolerance |
| 03/19/2013 | US8400216 3-way Doherty power amplifier using driving amplifier |
| 03/19/2013 | US8400215 Power amplification device for satellite communication device |
| 03/19/2013 | US8400214 Class AB output stage |
| 03/19/2013 | US8397571 Sensor output circuit |
| 03/14/2013 | WO2013036710A1 Versatile audio power amplifier |
| 03/14/2013 | WO2013035523A1 Rf signal generating circuit, and transmitter |
| 03/14/2013 | WO2013034779A1 Device for converting current pulses into voltage pulses |
| 03/14/2013 | WO2013034595A1 Electronic device with body-biasing circuit for portable equipment with usb connector for headset |
| 03/14/2013 | WO2013033837A1 Radio-frequency circuit having a transcoupling element |
| 03/14/2013 | WO2013033836A1 Radio-frequency transmitter, such as for broadcasting and cellular base stations |
| 03/14/2013 | WO2013033834A1 Wireless electric field power transmission system and method |
| 03/14/2013 | WO2013012787A3 Modified switching ripple for envelope tracking system |
| 03/14/2013 | WO2012148918A3 Apparatus and methods for envelope tracking |
| 03/14/2013 | US20130064398 Class-AB/B amplifier with quiescent control circuit |
| 03/14/2013 | US20130063215 Dual band amplifier |
| 03/14/2013 | US20130063213 Matrix distributed power amplifier |
| 03/14/2013 | US20130063212 Transimpedance amplifier and light receiving circuit |
| 03/14/2013 | US20130063211 Class A Push-Pull Amplifier |
| 03/14/2013 | US20130063210 High speed amplifier |
| 03/14/2013 | US20130063209 Switching amplifier with an inductor |
| 03/14/2013 | US20130063208 Radio-frequency transmitter, such as for broadcasting and cellular base stations |
| 03/13/2013 | EP2568606A1 Electronic device with body-biasing circuit for portable equipment with USB connector for headset |
| 03/13/2013 | EP2568600A1 Detection device provided with a transimpedance circuit |
| 03/13/2013 | EP2567458A2 Noise-canceling for differential amplifiers requiring no external matching |
| 03/13/2013 | CN202799078U Musical rhythm electroacoustic low-frequency power amplification signal transforming circuit |
| 03/13/2013 | CN202798591U Preceding-stage differential amplification circuit of comparator |
| 03/13/2013 | CN202798590U Error amplifier |
| 03/13/2013 | CN202798589U Signal amplifier |
| 03/13/2013 | CN202798588U Operational amplifier emphasis circuit |
| 03/13/2013 | CN202798587U High-linearity programmable transconductance amplifier circuit |
| 03/13/2013 | CN202798586U Class B push-pull amplifying circuit |
| 03/13/2013 | CN202798583U Radio frequency power amplifier circuit with high frequency, high linearity, high gain and wide frequency band |
| 03/13/2013 | CN202798580U System capable of enhancing thermal stability of oven controlled crystal oscillator |
| 03/13/2013 | CN202795113U Motor drive circuit structure for automatically adjusting output voltage |
| 03/13/2013 | CN102971963A Method and arrangement for driving a microphone |
| 03/13/2013 | CN102971962A Pseudo-envelope following power management system |
| 03/13/2013 | CN102969996A Realization method of nonlinear ultrasonic test instrument analog amplifying circuit and realization device thereof |
| 03/13/2013 | CN102969992A Level-controlled programming control amplifying method |
| 03/13/2013 | CN102969991A Low-offset automatic compensation circuit |
| 03/13/2013 | CN102969990A Multi-input differential amplifier with dynamic transduction compensation |
| 03/13/2013 | CN102969989A Power synthesis device of radio frequency power amplifier |
| 03/13/2013 | CN102969988A Class of power amplifiers for improved back off operation |
| 03/13/2013 | CN102969986A Output circuit structure of radio frequency power amplifier |
| 03/13/2013 | CN102969985A Calibration systems for wireless electronic devices |
| 03/13/2013 | CN102437507B Automatic power control circuit for driving optical communication laser |
| 03/13/2013 | CN102130659B Circuit structure for reducing input offset voltage of two-stage operational amplifier |
| 03/13/2013 | CN101764581B Integrated power amplifier for use in wireless communication devices |
| 03/13/2013 | CN101540589B 高频功率放大器 High frequency power amplifier |
| 03/13/2013 | CN101383595B Electronic volume ajuster and audio device using thereof and abnormity detection method |