Patents
Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008)
01/2011
01/26/2011CN201726368U Through-type high-definition power amplifier device of sound system
01/26/2011CN201726367U Cascode power amplifier with improved efficiency and linearity
01/26/2011CN201726366U Power amplifier with improved efficiency and linearity
01/26/2011CN201726365U Driving signal amplifying circuit
01/26/2011CN201726364U Audio power amplifier with audio signal control switch
01/26/2011CN201726363U Circuit capable of improving linearity and power-added efficiency of power amplifier
01/26/2011CN201726362U Circuit structure for improving linearity and PAE of power amplifier
01/26/2011CN201726361U Filter circuit capable of improving linearity of power amplifier and power added efficiency
01/26/2011CN201725869U Automobile front-window glass printed antenna amplifier system
01/26/2011CN1694356B Method and apparatus for self-oscillating differential feedback class-D amplifier
01/26/2011CN1414700B Current mirror induction amplifier and its operating mode
01/26/2011CN101958692A Low-pressure rail-to-rail calculation magnification circuit
01/26/2011CN101958691A Method and apparatus for high performance class d audio amplifiers
01/26/2011CN101958690A Class-D audio power amplifier circuit
01/26/2011CN101958689A Bias circuit, and gm-c filter circuit and semiconductor integrated circuit each including the same
01/26/2011CN101326692B 光发送电路 Optical transmission circuit
01/26/2011CN101222209B Dynamic bandwidth compensating method and associated apparatus
01/26/2011CN101114435B Driver circuit and display apparatus
01/26/2011CN101091307B Switch amplifier
01/25/2011US7877063 High-frequency amplifier, and transmission/reception system
01/25/2011US7876162 Amplifier and radio
01/25/2011US7876160 Multi-mode high efficiency linear power amplifier
01/25/2011US7876159 Power amplifier circuit for multi-frequencies and multi-modes and method for operating the same
01/25/2011US7876158 High gain stacked cascade amplifier with current compensation to reduce gain compression
01/25/2011US7876155 Transimpedance amplifier with distributed control of feedback line
01/25/2011US7876154 Variable gain amplifier having linear-in-dB gain characteristic
01/25/2011US7876153 Transconductor circuit
01/20/2011WO2011009066A2 Speaker system and amplifier
01/20/2011WO2011008569A1 A wide dynamic range electrometer with a fast response
01/20/2011WO2011008562A2 Integrated power amplifier with load inductor located under ic die
01/20/2011WO2011007556A1 Polar modulator
01/20/2011WO2011007529A1 High-frequency power amplifier
01/20/2011WO2011007499A1 Polar modulating transmitter and communication device using same
01/20/2011WO2011006549A1 Amplifier stage
01/20/2011US20110012682 Electronic circuit with cascode amplifier
01/20/2011US20110012681 Low distortion amplifier and doherty amplifier using low distortion amplifier
01/20/2011US20110012680 Semiconductor device, radio frequency circuit, and radio frequency power amplifier
01/20/2011US20110012679 High efficiency microwave amplifier
01/20/2011US20110012678 Transfer-function control in an active filter
01/20/2011US20110012677 Current sensing
01/20/2011US20110012676 Systems and methods of reduced distortion in a class d amplifier
01/20/2011US20110012675 Power amplification device for satellite communication device
01/20/2011US20110012674 Quiet power up and power down of closed loop digital pwm modulators
01/20/2011US20110012643 Apparatus and method for testing sense amplifier thresholds on an integrated circuit
01/20/2011US20110012639 Receiver, transceiver circuit, signal transmission method, and signal transmission system
01/19/2011EP2276170A2 High reliability RF generator architecture
01/19/2011EP2276169A2 High reliability RF generator architecture
01/19/2011EP2276168A2 Power amplifier integrated circuit with compensation mechanism for temperature and output power
01/19/2011EP2274829A1 Efficient linear linc power amplifier
01/19/2011EP2274828A1 System and method of enabling a signal processing device in a relatively fast manner to process a low duty cycle signal
01/19/2011EP1756945B1 Current-mode instrumentation amplifier gain error correction circuitry
01/19/2011CN201717940U Mobile phone provided with hand-free music playing function
01/19/2011CN201717918U Mobile terminal
01/19/2011CN201717834U High-power professional audio power amplifier based on Peltier Effect heat radiation technology
01/19/2011CN201717833U Radio-frequency solid-state broad band high power amplifier module
01/19/2011CN201717832U Super class A biasing circuit,
01/19/2011CN201717831U Radiofrequency matcher
01/19/2011CN1985438B Plop noise avoiding method and apparatus for an amplifier
01/19/2011CN1767379B Operational amplifier and method for generating output voltage of operational amplifier for driving load
01/19/2011CN101951243A Full digital phase modulation and amplitude modulation clock generating circuit for switch power amplifier
01/19/2011CN101951236A Digital variable gain amplifier
01/19/2011CN101951234A Amplifier, method for improving common mode feedback loop phase margin thereof and radio-frequency receiving chip
01/19/2011CN101951233A Differential class AB amplifier circuit, driver circuit and display device
01/19/2011CN101951232A Radio-frequency (RF) power amplifier
01/19/2011CN101951231A Power synthesis technology device of low-frequency amplifier
01/19/2011CN101951229A Multi-gain mode low-noise amplifier
01/19/2011CN101951227A Amplifier circuit
01/19/2011CN101951226A Silicon germanide bipolar-complementary metal oxide semiconductor AB power amplifier
01/19/2011CN101262457B A time division duplex linear power amplification module with digital pre-distortion technology
01/18/2011US7872534 Image signal amplifying circuit and amplifying semiconductor integrated circuit
01/18/2011US7872533 Leakage current reduction in a power regulator
01/18/2011US7872532 High-frequency power amplifier and communication device
01/18/2011US7872531 Amplifier bias techniques
01/18/2011US7872530 Flexible dynamic range amplifier
01/18/2011US7872526 Balanced amplifying device having a bypass branch
01/18/2011US7872523 Radio frequency (RF) envelope pulsing using phase switching of switch-mode power amplifiers
01/18/2011US7872522 Noise reduction system and method for audio switching amplifier
01/17/2011CA2710048A1 High efficiency microwave amplifier
01/13/2011WO2011004591A1 Filter circuit and optical disc device provided with same
01/13/2011WO2011004557A1 Polar modulation transmission circuit and polar modulation transmission method
01/13/2011WO2011004553A1 Polar modulator
01/13/2011WO2011004512A1 Filter circuit and optical disc device provided with same
01/13/2011WO2011003929A1 Dual-performance low noise amplifier for satellite-based radiofrequency communication
01/13/2011WO2010120762A3 Preselector amplifier
01/13/2011WO2010108039A8 Cascode amplifier with protection circuitry
01/13/2011US20110007058 Differential class ab amplifier circuit, driver circuit and display device
01/13/2011US20110007044 Semiconductor Device, and Display Device and Electronic Device Utilizing the Same
01/13/2011US20110006858 Multi-Source Spatial Power Amplifier
01/13/2011US20110006848 Amplifier circuit
01/13/2011US20110006847 High-voltage impulse amplifier
01/13/2011US20110006845 Amplifier stage
01/13/2011US20110006844 Class D Amplifier Control Circuit and Method
01/13/2011US20110006843 Offset voltage correction circuit and class D amplifier
01/13/2011US20110006841 Switchable balanced amplifier
01/13/2011DE112008003381T5 Filterschaltung für ein Electretmikrophon Filter circuit for a electret microphone
01/12/2011EP2273672A1 Low distortion amplifier and doherty amplifier using low distortion amplifier
01/12/2011EP2273466A1 Smoke sensor
01/12/2011EP2272163A1 Electrical physical layer activity detector
01/12/2011EP2127072B1 Chopper-stabilized instrumentation amplifier
01/12/2011CN201708768U Multiplex-mode non-loaded effect radio-frequency power amplifier control circuit