| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 07/25/2012 | EP2419996B1 Amplifier circuit, integrated circuit and radio frequency communication unit |
| 07/25/2012 | EP2186284B1 Signal modulation for switched mode power amplifiers technical field of the invention |
| 07/25/2012 | EP2057735B1 Differential to single-ended conversion circuit and comparator using the circuit |
| 07/25/2012 | CN202353521U Radio-frequency modulation output circuit and gain compensation amplifier thereof |
| 07/25/2012 | CN202353520U Multifunctional input power amplifier control circuit |
| 07/25/2012 | CN202353519U 功率放大电路 Power amplifier circuit |
| 07/25/2012 | CN202353518U Power amplifier circuit capable of outputting prelude sound |
| 07/25/2012 | CN102612804A Switched active bias control and power-on sequencing circuit for an amplifier |
| 07/25/2012 | CN102611402A Dynamic range compression circuit and class d amplifier |
| 07/25/2012 | CN102611401A Amplifier system for a power converter |
| 07/25/2012 | CN102611400A High-gain single-stage operational transconductance amplifier |
| 07/25/2012 | CN102611399A Operational amplifier device |
| 07/25/2012 | CN102611398A Semiconductor integrated circuit having a switched charge pump unit and operating method thereof |
| 07/25/2012 | CN102611397A Multi-level control circuit, method and system for pass transistor gate voltage |
| 07/25/2012 | CN102611396A Microwave solid-state power amplifier |
| 07/25/2012 | CN102611395A Low-noise amplifier in multi-mode navigation type radiofrequency chip |
| 07/25/2012 | CN102611393A Radio frequency power amplifier system having waveband switching function |
| 07/25/2012 | CN102610623A Image sensor and source follower |
| 07/25/2012 | CN101989836B Efficient audio amplifier and related method thereof |
| 07/25/2012 | CN101847968B High-performance D type audio power amplifier with high-order multipath feedback structure |
| 07/25/2012 | CN101741324B Product-to-sum type D power amplifier and method thereof |
| 07/25/2012 | CN101669282B Arithmetic amplifier and pipeline type ad converter |
| 07/25/2012 | CN101599745B Driving amplifier circuit |
| 07/25/2012 | CN101479946B Transmission circuit and communication device |
| 07/25/2012 | CN101340076B Dual-window voltage comparator wire and delay converting circuit |
| 07/25/2012 | CN101252352B Semiconductor integrated circuit device and high-frequency power amplifier module |
| 07/25/2012 | CN101005282B Differential-to-single-ended converter and phase-locked loop circuit having the same |
| 07/24/2012 | US8228124 Headphone amplifier circuit |
| 07/24/2012 | US8228123 Integrated Doherty amplifier |
| 07/24/2012 | US8228122 Regulator and temperature compensation bias circuit for linearized power amplifier |
| 07/24/2012 | US8228121 Automatic gain control circuit |
| 07/24/2012 | US8228120 Negative capacitance synthesis for use with differential circuits |
| 07/24/2012 | US8228118 Switching amplifier using capacitor for transmitting energy |
| 07/24/2012 | US8228117 Quiet power up and power down of closed loop digital PWM modulators |
| 07/24/2012 | US8227739 Photodetector amplifier circuit for controlling an on state or an off state of an output transistor |
| 07/19/2012 | WO2012096834A1 Apparatus and method for miller compensation for multi-stage amplifier |
| 07/19/2012 | WO2012096442A1 Voltage variable type digital audio amplifying device for noise compensation and method therefor |
| 07/19/2012 | WO2012096337A1 Amplifying device |
| 07/19/2012 | WO2012070777A3 Multichannel detector having a reduced number of output channels |
| 07/19/2012 | US20120182167 Buffer to drive reference voltage |
| 07/19/2012 | US20120182081 Dynamic Range Compression Circuit and Class D Amplifier |
| 07/19/2012 | US20120182075 Apparatus and method for miller compensation for multi-stage amplifier |
| 07/19/2012 | US20120182074 Single die power amplifier with closed loop power control |
| 07/19/2012 | US20120182073 Apparatus and Method for Programmable Power Management in a Programmable Analog Circuit Block |
| 07/19/2012 | US20120182072 Self-Biasing Radio Frequency Circuitry |
| 07/19/2012 | US20120182071 Operational amplifier circuit |
| 07/19/2012 | US20120182070 Output stage formed inside and on top of an soi-type substrate |
| 07/19/2012 | US20120182069 Amplifier system for a power converter |
| 07/19/2012 | US20120182068 Dc offset tracking circuit |
| 07/19/2012 | CA2762135A1 Amplifier system for a power converter |
| 07/18/2012 | EP2477329A1 Defibrillator having specialized output waveforms |
| 07/18/2012 | EP2477328A2 Method and Apparatus for Effecting High-Frequency Amplification or Oscillation |
| 07/18/2012 | EP2476209A1 Impedance matching method for a multi-band antenna, and transmission or reception channel having automatic matching |
| 07/18/2012 | EP2131492B1 Rf amplification device |
| 07/18/2012 | EP2055000B1 Buffer device for switched capacity circuit |
| 07/18/2012 | CN202340204U 基于pxi总线的电荷放大装置 Based on the charge amplifier means pxi bus |
| 07/18/2012 | CN1862952B High frequency power amplifier, transmitter and mobile communication terminal using the power amplifier |
| 07/18/2012 | CN102598504A Amplifying device |
| 07/18/2012 | CN102595761A RF power amplifier stability network |
| 07/18/2012 | CN102594375A Receiver applied to a satellite down converter and amplifier |
| 07/18/2012 | CN102594273A DC offset tracking circuit and method thereof |
| 07/18/2012 | CN102594272A Circuit for reducing electromagnetic interference of class-D audio-frequency power amplifier |
| 07/18/2012 | CN102594271A Biasing circuit of power amplifier |
| 07/18/2012 | CN102594270A High-frequency class-A and class-C power amplifier |
| 07/18/2012 | CN102594269A Radio-frequency power amplifier for mobile phone |
| 07/18/2012 | CN102594268A Folding signal amplifier |
| 07/18/2012 | CN102594263A Simple and high-efficiency super class-A power amplifier |
| 07/18/2012 | CN101938271B Circuit for conditioning micro-current/voltage conversion signal |
| 07/18/2012 | CN101907600B Device for measuring mine dust concentration based on differential principle |
| 07/18/2012 | CN101627551B Digital convertible radio snr optimization |
| 07/18/2012 | CN101610068B Circuit for reducing noise figure of amplifier |
| 07/18/2012 | CN101595638B Bias circuit and semiconductor integrated circuit using the same |
| 07/18/2012 | CN101594118B Operational amplifier and related source driver of display thereof |
| 07/18/2012 | CN101552644B DC interference suppressor circuit used for transimpedance preamplifier of infrared receiving system |
| 07/18/2012 | CN101404481B Semiconductor circuit |
| 07/18/2012 | CN101102095B Offset voltage correction circuit and class d amplifier |
| 07/18/2012 | CN101098129B Method and apparatus to supply power voltage to a mobile device in a variable manner |
| 07/18/2012 | CN101057396B Tunable cascode LNA with flat gain response over a wide frequency range |
| 07/17/2012 | US8223036 Wireless telemetry electronic circuitry for measuring strain in high-temperature environments |
| 07/17/2012 | US8222967 Receiver equalizer circuitry having wide data rate and input common mode voltage ranges |
| 07/17/2012 | US8222959 Amplification control circuit |
| 07/17/2012 | US8222958 Operational amplifier |
| 07/17/2012 | US8222957 Differential amplifier circuit, display panel driver, and display device |
| 07/17/2012 | US8222956 Amplifying device and signal processing method based on amplifying device |
| 07/17/2012 | US8222590 Signal amplifier for optical receiver circuit |
| 07/12/2012 | WO2012094461A2 Circuit and method for reducing input leakage in chopped amplifier during overload conditions |
| 07/12/2012 | WO2012093458A1 Loop filter buffer with level shifter |
| 07/12/2012 | US20120178400 Amplifiers and related receiver systems |
| 07/12/2012 | US20120178397 Receiver applied to a satellite down converter and radio frequency metal-oxide-semiconductor amplifier |
| 07/12/2012 | US20120176523 Sense amplifier including negative capacitance circuit and apparatuses including same |
| 07/12/2012 | US20120176200 Cross-differential amplifier |
| 07/12/2012 | US20120176198 Bias generation circuit, power amplifier module, and semiconductor device |
| 07/12/2012 | US20120176197 Rf power amplifier |
| 07/12/2012 | US20120176195 Asymmetric Multilevel Outphasing Architecture For RF Amplifiers |
| 07/12/2012 | US20120176194 Apparatus and method for improving performance in doherty amplifier |
| 07/12/2012 | US20120176106 Switching supply circuits and methods |
| 07/12/2012 | US20120175504 Electrical isolators |
| 07/12/2012 | DE102007026023B4 Systeme, Verfahren und Vorrichtungen für lineare polare Sender Systems, methods and apparatus for linear polar transmitter |
| 07/11/2012 | EP2475097A1 Power synthesis circuit for radio frequency power amplifier |
| 07/11/2012 | EP2475096A1 Power amplifier and receiver in user device |