| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 06/05/2008 | US20080129386 Radio frequency modulator and methods thereof |
| 06/05/2008 | US20080129385 High-frequency amplification circuit |
| 06/05/2008 | US20080129384 Variable gain amplifier circuit |
| 06/05/2008 | US20080129383 Differential amplifier circuit |
| 06/05/2008 | US20080129382 High efficiency digital power amplifier |
| 06/05/2008 | US20080129381 Digital Amplifying Apparatus |
| 06/05/2008 | US20080129380 Constant Current Darlington Circuits for High Power |
| 06/05/2008 | US20080129378 Detector for automatic gain control |
| 06/05/2008 | US20080129377 Voltage regulator with current sink for diverting external current and digital amplifier including the same |
| 06/05/2008 | US20080129376 All digital class-d modulator and its saturation protection techniques |
| 06/05/2008 | US20080129375 Power Supply Compensation |
| 06/05/2008 | US20080129370 Control circuit and method for a switching amplifier |
| 06/05/2008 | US20080129345 Low-voltage, low-power-consumption, and high-speed differential current-sense amplification |
| 06/05/2008 | US20080128594 Backlight module with controlled output light intensity and driving method for same |
| 06/05/2008 | DE102007055533A1 Power amplifier for use in wireless communication system, has amplification stages for amplifying and outputting high frequency signals, and transmission lines of line transformer connected with ground connection over output resistor |
| 06/04/2008 | EP1928141A2 Transmitter for suppressing out-of-band power of a signal |
| 06/04/2008 | EP1928087A1 Variable gain amplifier circuit |
| 06/04/2008 | EP1927174A2 Esd protection circuits |
| 06/04/2008 | CN101194431A By-pass arrangement of a low noise amplifier |
| 06/04/2008 | CN101192864A RF power amplifying device and wireless communication terminal device for carrying the same |
| 06/04/2008 | CN101192811A Variable gain amplifier circuit |
| 06/04/2008 | CN101192810A A D-category amplifier and method for driving three-line dual track speaker based on it |
| 06/04/2008 | CN101192392A Source electrode driver, electro-optical device, and electronic instrument |
| 06/04/2008 | CN101191815A Circuit of detecting power-up and power-down |
| 06/03/2008 | US7383373 Deriving corresponding signals |
| 06/03/2008 | US7383023 Communication apparatus |
| 06/03/2008 | US7382987 Identification level control method and optical receiver |
| 06/03/2008 | US7382887 Method and device for reducing high frequency error components of a multi-channel modulator |
| 06/03/2008 | US7382198 Differential amplifier circuitry formed on semiconductor substrate with rewiring technique |
| 06/03/2008 | US7382197 Adaptive tuning circuit to maximize output signal amplitude for an amplifier |
| 06/03/2008 | US7382196 UHF active antenna amplifier for digital video broadcast (DVB) receiver and related DVB device |
| 06/03/2008 | US7382195 Power supply device for driving an amplifier |
| 06/03/2008 | US7382194 Switched distributed power amplifier |
| 06/03/2008 | US7382192 Bias current compensation circuit for a differential input stage |
| 06/03/2008 | US7382191 Multiplier-transimpedance amplifier combination with input common mode feedback |
| 06/03/2008 | US7382190 Variable attenuation system having continuous input steering |
| 06/03/2008 | US7382189 Multi-gain amplifier with input impedance control |
| 06/03/2008 | US7382188 Circuit for reducing distortion of class D amplifier |
| 06/03/2008 | US7382185 Loop segment switching system |
| 06/03/2008 | US7382184 Amplifier system and method |
| 06/03/2008 | US7382175 Frequency mixer preventing degradation in linearity on amplitude of input signal |
| 06/03/2008 | US7382174 A-AB transconductor |
| 06/03/2008 | US7382160 Differential output circuit with reduced differential output variation |
| 05/29/2008 | WO2008063533A1 Distributed multi-stage amplifier |
| 05/29/2008 | WO2008063530A2 Pulse amplifier |
| 05/29/2008 | WO2008061444A1 A split-path linear isolation circuit apparatus |
| 05/29/2008 | WO2008042188A3 Signal conditioning circuit, a comparator including such a conditioning circuit and a successive approximation converter including such a circuit |
| 05/29/2008 | WO2008029091A3 Switching amplifier |
| 05/29/2008 | WO2008024666A3 Method and apparatus for controlling a selectable voltage audio power output stage |
| 05/29/2008 | US20080125072 High Performance Low Noise Amplifier |
| 05/29/2008 | US20080125061 Rf power amplifying device and wireless communication terminal device |
| 05/29/2008 | US20080122543 Switching power supply |
| 05/29/2008 | US20080122542 Enhanced amplifier with auxiliary path bias modulation |
| 05/29/2008 | US20080122541 Amplifier circuit |
| 05/29/2008 | US20080122540 Low-power variable gain amplifier |
| 05/29/2008 | US20080122539 Signal amplification device |
| 05/29/2008 | US20080122538 Wideband active balun circuit based on differential amplifier |
| 05/29/2008 | US20080122537 Operational amplifier circuit |
| 05/29/2008 | US20080122536 Three-stage amplifier |
| 05/29/2008 | US20080122535 Methods for controlling power stage of power amplifier and related apparatuses |
| 05/29/2008 | US20080122534 Amplifier Switching Output Stage With Low Distortion |
| 05/29/2008 | US20080122533 Circuit for reducing crosstalk |
| 05/29/2008 | US20080122532 Amplifier device |
| 05/29/2008 | US20080122531 Method and apparatus for rf input coupling for inductive output tubes and other emission gated devices |
| 05/29/2008 | DE19953121B4 Verfahren zur Ansteuerung einer digitalen Endstufe und Audioanlage Method for controlling a digital amplifier and audio system |
| 05/29/2008 | DE102006055577A1 Electronic circuit for e.g. audio amplifier system, has feedback circuit containing simulation of signal path between output of sigma-delta-modulator and output of power amplifier, and reconstruction filter arranged downstream to amplifier |
| 05/28/2008 | EP1647091B1 Low-consumption voltage amplifier |
| 05/28/2008 | CN201066835Y Digital multimedia sound amplification circuit |
| 05/28/2008 | CN201066586Y Electronic controller for electric horn |
| 05/28/2008 | CN101188411A Deviation current compensation circuit for differential input level |
| 05/28/2008 | CN101188408A Amplifier device |
| 05/28/2008 | CN101188407A A digital natural impulse modulation method and device |
| 05/28/2008 | CN101188406A Low frequency analog circuit design method and its low frequency analog circuit |
| 05/28/2008 | CN101188404A Power amplifier using power synthesizer. |
| 05/28/2008 | CN101188403A Audio amplification device with adjustable power consumption |
| 05/28/2008 | CN101187572A Double passage differential anti-jamming current amplification circuit |
| 05/28/2008 | CN100391115C Electronic equipment with power amplifier |
| 05/28/2008 | CN100390804C An electronic circuit for converting a current signal to a voltage signal |
| 05/27/2008 | US7379728 Wireless communication system |
| 05/27/2008 | US7379715 Transmitter apparatus and method using polar modulation with signal timing adjustment |
| 05/27/2008 | US7378911 Wideband ultra low noise amplifier |
| 05/27/2008 | US7378910 Power amplifier for a transmitter |
| 05/27/2008 | US7378908 Variable gain differential amplifier, and variable degeneration impedance control device and method for use in the same |
| 05/27/2008 | US7378907 Selective differential low-noise amplifier |
| 05/27/2008 | US7378905 Differential driver circuit |
| 05/27/2008 | US7378904 Soft transitions between muted and unmuted states in class D audio amplifiers |
| 05/27/2008 | US7378902 Systems and methods of RF power transmission, modulation, and amplification, including embodiments for gain and phase control |
| 05/27/2008 | US7378881 Variable gain amplifier circuit |
| 05/22/2008 | WO2008061203A1 Differential current conveyor input stage |
| 05/22/2008 | WO2008060498A2 Noise reduction system and method for audio switching amplifier |
| 05/22/2008 | WO2008060418A2 Switching power supply |
| 05/22/2008 | WO2008059452A1 Class-d amplifier |
| 05/22/2008 | WO2008032264A3 Amplifier architecture for polar modulation |
| 05/22/2008 | WO2007146052A3 Solid state microwave power amplifier |
| 05/22/2008 | WO2007019281A9 Origami cascaded topology for analog and mixed-signal applications |
| 05/22/2008 | US20080119154 Programmable variable gain amplifier and rf receiver including the same |
| 05/22/2008 | US20080116979 Amplifier circuit and methods of operation thereof |
| 05/22/2008 | US20080116978 Audio Amplifier Driven by Single Voltage Source and Related Voltage Supply Circuit |
| 05/22/2008 | US20080116977 Voltage supply insensitive bias circuits |
| 05/22/2008 | US20080116976 Low noise amplifier with multiple inputs and multiple outputs |