| 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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| 11/13/2008 | US20080278253 Pulse Width Modulator System |
| 11/13/2008 | US20080278235 Method and apparatus for protecting devices in an rf power amplifier |
| 11/13/2008 | US20080278231 Amplifier |
| 11/13/2008 | CA2685191A1 Multiport amplifiers in communications satellites |
| 11/13/2008 | CA2684917A1 Power supplies for rf power amplifier |
| 11/12/2008 | EP1990912A2 Dynamic bias for RF power amplifiers |
| 11/12/2008 | CN201150049Y 高效率功率放大器 High Efficiency Power Amplifier |
| 11/12/2008 | CN101305515A Amplifying apparatus |
| 11/12/2008 | CN101304244A Matching circuit |
| 11/12/2008 | CN101304240A Voltage limiting apparatus as well as operation amplifier applying the same and circuit design method thereof |
| 11/12/2008 | CN101304238A Bias switching circuit |
| 11/12/2008 | CN101304237A Amplifier apparatus capable of eliminating migration voltage |
| 11/12/2008 | CN101304236A Variable bias control for switch mode RF amplifier |
| 11/12/2008 | CN100433548C Power amplifier |
| 11/12/2008 | CN100433545C Full current excitation balance injection feedforward power amplifier |
| 11/11/2008 | US7450912 Transmitter and transceiver |
| 11/11/2008 | US7449956 Semiconductor device |
| 11/11/2008 | US7449954 Fast settling power amplifier regulator |
| 11/11/2008 | US7449946 High voltage, high current, and high accuracy amplifier |
| 11/06/2008 | WO2008134404A2 Systems and methods for measuring non-linear characteristics of a power amplifier |
| 11/06/2008 | WO2007087630A3 Notch filter for ripple reduction in chopper stabilized amplifiers |
| 11/06/2008 | WO2006121650A3 Power amplifier with an output matching network |
| 11/06/2008 | US20080272844 Class ab folded-cascode amplifier having cascode compensation |
| 11/06/2008 | DE112006003020T5 Operationsverstärker mit Null-Offset Operational amplifier with zero offset |
| 11/06/2008 | DE10010153B4 Switched-Capacitor-Referenzstromquelle Switched capacitor reference current source |
| 11/05/2008 | EP1716723B1 Output stage for a hearing aid and method of driving output stage |
| 11/05/2008 | CN201146482Y Circuit for detecting radio frequency power |
| 11/05/2008 | CN101299596A Adaptive biasing input stage and amplifiers including the same |
| 11/05/2008 | CN101299595A Method and apparatus system for compensating temperature of power amplifier |
| 11/05/2008 | CN101299594A Selection circuit |
| 11/05/2008 | CN100431264C N-way RF power amplifier circuit with increased back-off capability and power added efficiency |
| 11/05/2008 | CN100431263C Pulse modulated power converter |
| 11/05/2008 | CN100431262C A power amplifier system |
| 11/04/2008 | US7446612 Amplifier feedback and bias configuration |
| 11/04/2008 | US7446611 Fully differential amplifier device with output-common-mode feedback and control method thereof |
| 11/04/2008 | US7446602 Switched capacitor amplifier circuit and method for operating a switched capacitor amplifier circuit |
| 10/30/2008 | WO2008128706A1 A method and apparatus to linearize transconductors by predistortion |
| 10/30/2008 | WO2008112041A3 Power supply providing ultrafast modulation of output voltage |
| 10/30/2008 | WO2008048530B1 Optimized uplink efficiencies for transmission of satellite data |
| 10/30/2008 | US20080268795 Predistortion circuit for a transmit system |
| 10/30/2008 | US20080265996 Digital Hybrid Mode Power Amplifier System |
| 10/30/2008 | US20080265988 Multiple output power mode amplifier |
| 10/30/2008 | DE112006003184T5 Vollbrücken-Leistungsverstärker der Klasse D Full-bridge power amplifier Class D |
| 10/30/2008 | DE10231156B4 Schaltung zum Liefern einer Basis-Betriebsspannung für einen Bipolartransistor und Verstärkerschaltung Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit |
| 10/29/2008 | EP1986333A2 Linearisation in an emission channel |
| 10/29/2008 | EP1985034A1 Multi-mode selectable modulation architecture calibration and power control apparatus, system and method for radio frequency power amplifier |
| 10/29/2008 | EP1985014A2 Pwm feedback/feed-forward protection |
| 10/29/2008 | EP1985012A1 Power amplifier |
| 10/29/2008 | EP1985009A2 Method and system for transmitter envelope delay calibration |
| 10/29/2008 | EP1563600B1 Systems and methods of dynamic bias switching for radio frequency power amplifiers |
| 10/29/2008 | CN201142670Y Adjustable high-sensibility high-resolution audio-detector |
| 10/29/2008 | CN101297498A Method and apparatus for control of transmitter power consumption |
| 10/29/2008 | CN101297477A Transconductance device |
| 10/29/2008 | CN101297476A Device and method for amplifying pulsed RF signals |
| 10/29/2008 | CN101297475A Method and arrangement for optimizing efficiency of a power amplifier |
| 10/29/2008 | CN100429868C Apparatus and method for improving efficiency of power amplifier operating under large peak-to average power ratio |
| 10/28/2008 | USRE40550 Method and device for improved class BD amplification having single-terminal alternating-rail dual-sampling topology |
| 10/28/2008 | USRE40549 Circuitry for a high voltage linear current sense IC |
| 10/28/2008 | US7443246 Constant current biasing circuit for linear power amplifiers |
| 10/28/2008 | US7443245 High frequency power amplifier circuit and electronic component for high frequency power amplifier |
| 10/28/2008 | US7443236 CDMA power amplifier design for low and high power modes |
| 10/28/2008 | US7443234 Differential amplifier, digital-to-analog converter and display device |
| 10/28/2008 | US7443233 DC offset cancellation apparatus |
| 10/28/2008 | US7443232 Active load arrangement |
| 10/23/2008 | WO2008127860A1 Metal-oxide-semiconductor circuit designs and methods for operating same |
| 10/23/2008 | WO2008126282A1 Amplifier circuit |
| 10/23/2008 | WO2008126217A1 Distortion compensation controller and distortion compensation control method |
| 10/23/2008 | WO2008125817A1 Controlling amplifier input impedance |
| 10/23/2008 | US20080258809 Amplifier Device Capable of Reducing Offset Voltage |
| 10/22/2008 | EP1983659A2 Method and apparatus for dynamic digital pre-distortion in radio transmitters |
| 10/22/2008 | EP1983572A1 Transformer based ESD protection |
| 10/22/2008 | EP1982411A2 Notch filter for ripple reduction in chopper stabilized amplifiers |
| 10/22/2008 | EP1982400A1 Power supply for limited power sources and audio amplifier using power supply |
| 10/22/2008 | EP1609238A4 Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier |
| 10/22/2008 | EP1292020B1 Amplifier circuit |
| 10/22/2008 | EP1157389B1 Double input buffer for track-and-hold amplifier |
| 10/22/2008 | CN101291138A Operation amplifier and its flash noise reducing method |
| 10/22/2008 | CN101291137A Feedforward amplifier |
| 10/22/2008 | CN100428627C Distortion compensation circuit, distortion compensation signal generating method, and power amplifier |
| 10/22/2008 | CN100428626C Multiplication system capable of reducing DC bias |
| 10/22/2008 | CN100428625C Radio frequency band low temperature low noise amplifier |
| 10/21/2008 | US7440870 System for monitoring the quality of industrial processes and method therefrom |
| 10/21/2008 | US7440733 Constant gain nonlinear envelope tracking high efficiency linear amplifier |
| 10/21/2008 | US7439811 Broadband low noise amplifier and RF signal amplification method of the same |
| 10/21/2008 | US7439802 Unilateral feedback power amplifier and method for realizing the same |
| 10/21/2008 | US7439786 Power amplification circuits |
| 10/16/2008 | WO2008124347A1 Differential amplifier with active post-distortion linearization |
| 10/16/2008 | WO2008123624A1 Low-noise amplifier |
| 10/16/2008 | WO2008123438A1 Synthesizer for doherty amplifier |
| 10/16/2008 | WO2008122506A1 Circuitry and method for reducing second and third-order nonlinearities |
| 10/16/2008 | WO2008091820A3 Unity gain voltage buffer with dual supply voltage |
| 10/16/2008 | WO2008020368A3 Rf transmitter with controlable rf power amplifier |
| 10/16/2008 | US20080252792 Television Switch Module |
| 10/16/2008 | US20080252379 High slew rate amplifier, analog-to digital converter using same, CMOS imager using the analog-to-digital converter and related methods |
| 10/16/2008 | US20080252371 Feedforward amplifier |
| 10/16/2008 | US20080252370 Digital Audio Amplifier and Digital Audio Amplifying Method Therefor |
| 10/16/2008 | US20080252369 Operational amplifier, line driver, and liquid crystal display device |
| 10/15/2008 | EP1980073A1 Cartesian modulation system via multi-level pulse width modulation |
| 10/15/2008 | EP1413054B1 Auxiliary circuitry for monolithic microwave integrated circuit |
| 10/15/2008 | CN201134786Y Control circuit for systematical distortion |