| 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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| 04/22/2009 | CN201226506Y Audio power amplification circuit |
| 04/22/2009 | CN101416406A Method and apparatus to compensate AM-PM delay mismatch in envelope restoration transmitter |
| 04/22/2009 | CN101416385A Low power consumption adaptive power amplifier related application |
| 04/22/2009 | CN101416384A Active splitter apparatus and method using duplexing frontend |
| 04/22/2009 | CN101416383A Method for compensating signal distortion of composite amplifier |
| 04/22/2009 | CN101416382A Method and equipment for reducing frequency memory effect of RF power amplifier |
| 04/22/2009 | CN101414807A Signal amplification circuit |
| 04/22/2009 | CN101414806A RF power amplifier apparatus and power supply circuit for controlling power-supply voltage to RF power amplifier |
| 04/22/2009 | CN101414805A Semiconductor integrated circuit with variable gain amplifier |
| 04/22/2009 | CN101414804A Power amplifier and nonlinearity correction method, apparatus thereof |
| 04/22/2009 | CN101413969A Signal conditioning circuit for high precision measuring uV level voltage |
| 04/22/2009 | CN100481741C Amplifier circuit, wireless base station, wireless terminal, and amplifying method |
| 04/22/2009 | CN100481718C AB rail-to-rail operational amplifier |
| 04/22/2009 | CN100481716C Bias circuit and control circuit thereof |
| 04/22/2009 | CN100481715C Electric level detector for protection control power amplifier and power amplifier thereof |
| 04/22/2009 | CN100481714C Amplifier circuit having improved linearity and frequency band using a MGTR |
| 04/22/2009 | CN100481713C Variable gain amplifier |
| 04/22/2009 | CN100481712C Power source for amplifier and method for controlling operational power fed to the amplifier |
| 04/21/2009 | US7523021 Weighting function to enhance measured diffraction signals in optical metrology |
| 04/21/2009 | US7523020 Apparatus and method for dynamic smoothing |
| 04/16/2009 | WO2009047705A1 Transmitter |
| 04/16/2009 | WO2009047393A1 Apparatus and method for measuring the level of rf signals, and a transmitter including a wide band measurement circuit |
| 04/16/2009 | WO2009046627A1 A method for correcting signals in radio frequency links and the pre-distortion unit thereof |
| 04/16/2009 | US20090097590 Distortion-Compensated RF Transmitter and Method Therefor |
| 04/16/2009 | US20090097589 Lower complexity layered modulation signal processor |
| 04/16/2009 | US20090096533 Adaptively tuned rf power amplifier |
| 04/16/2009 | US20090096527 Automatic gain control circuit and low noise amplifying circuit |
| 04/16/2009 | US20090096525 Power amplifier |
| 04/16/2009 | US20090096522 Amplifier circuit |
| 04/16/2009 | US20090096521 Power amplifier predistortion methods and apparatus using envelope and phase detector |
| 04/16/2009 | DE102007026930B4 Endstufensystem Amplifier system |
| 04/15/2009 | EP2047593A1 Stacked buffers |
| 04/15/2009 | EP2047592A2 Fast charge circuit for use in amplifiers |
| 04/15/2009 | EP1999758A4 Offset cancellation for sampled-data circuits |
| 04/15/2009 | EP1683266B1 Power amplifier pre-distortion |
| 04/15/2009 | EP1374398B1 Circuit and method for input side impedance matching of a power amplifier in an electronic device |
| 04/15/2009 | EP1293038B1 Pwm limiter |
| 04/15/2009 | CN101411058A Distortion compensation circuit |
| 04/15/2009 | CN101411057A Circuit and method for reducing noise |
| 04/15/2009 | CN101411056A Amplifier and method of amplifying an input signal |
| 04/15/2009 | CN101409572A Module for matching single or multi-system signal |
| 04/15/2009 | CN101409532A Mixed output stage circuit and correlation method |
| 04/15/2009 | CN100479325C Cascode circuit and communication apparatus using the same circuit |
| 04/14/2009 | US7519514 Systems and methods for removing noise from spectral data |
| 04/14/2009 | US7519512 Dynamic blind signal separation |
| 04/14/2009 | US7518454 Operational amplifier selecting one of inputs, and an amplifying apparatus using the OP amplifier the verification method |
| 04/14/2009 | US7518450 Digital amplifier |
| 04/14/2009 | US7518447 Transimpedance amplifier |
| 04/14/2009 | US7518446 Multi-mode power amplifier with reduced low power current consumption |
| 04/14/2009 | US7518440 Dual path chopper stabilized amplifier and method |
| 04/14/2009 | US7518439 High precision gain amplifier without precision passive components |
| 04/09/2009 | WO2009046349A1 Configurable feedback for an amplifier |
| 04/09/2009 | WO2009045686A2 Inverted doherty amplifier with increased off-state impedence |
| 04/09/2009 | WO2009044353A2 A distributed low noise amplifier |
| 04/09/2009 | WO2009043970A1 Signal predistortion in radio transmitter |
| 04/09/2009 | WO2009043892A1 Protection circuit for mosfet |
| 04/09/2009 | WO2009007322A3 Sound reproduction device and method for the calibration of a sound reproduction device |
| 04/09/2009 | US20090091391 Configurable feedback for an amplifier |
| 04/09/2009 | US20090091384 Systems and methods of RF power transmission, modulation and amplification |
| 04/09/2009 | US20090091383 Gain amplifier having switched-capacitor structure for minimizing settling time |
| 04/09/2009 | DE102007044942A1 Amplifier device has signal amplifier, constant component amplifier for change of constant component of signal amplifier and reference circuit for production of reference signal |
| 04/08/2009 | EP2045914A1 Polar-modulation transmission device |
| 04/08/2009 | EP2045913A1 Low noise amplifier and N-mode gain control circuit therefor |
| 04/08/2009 | EP2044687A1 A method for controlling a linear amplifier and power amplifier arrangement |
| 04/08/2009 | EP2044668A2 Polar transmitter having a dynamically controlled voltage regulator and method for operating same |
| 04/08/2009 | CN201219249Y Aviation data chain high-power broad band linear power amplifier |
| 04/08/2009 | CN101405934A Dynamic bias control in power amplifier |
| 04/08/2009 | CN101405924A Power supply for limited power sources and audio amplifier using power supply |
| 04/08/2009 | CN101404480A Single slice integrated anti-sound break class D audio power amplifier |
| 04/08/2009 | CN101404479A Audio output device and method |
| 04/08/2009 | CN101404478A Method and apparatus for improving efficiency of class E power amplifier |
| 04/08/2009 | CN100477544C Device and method for frequency conversion |
| 04/08/2009 | CN100477509C Radio communication frequency signal amplifier and transmitting/receiving device |
| 04/08/2009 | CN100477508C Differential amplifier, data driver and display |
| 04/08/2009 | CN100477507C Amplifier circuit |
| 04/08/2009 | CN100477505C Class D power amplifier of filtering free circuit |
| 04/08/2009 | CN100477503C Photo-amplifier circuit, light receiver and method for generating electric signal |
| 04/08/2009 | CN100477502C Protection circuit of digital amplifier |
| 04/08/2009 | CN100477501C Semiconductor integrated circuit device |
| 04/08/2009 | CN100477500C Power amplifier pre-distortion and base station with the same |
| 04/08/2009 | CN100477499C Power amplifier with bias voltage control |
| 04/08/2009 | CN100477498C Current-controlled cmos wideband amplifier/equalizer circuit |
| 04/08/2009 | CN100477497C A doherty amplifier and signal processing method thereof |
| 04/08/2009 | CN100477496C Apparatus and methods for electromagnetic processing of input signal |
| 04/08/2009 | CN100477495C Capacitor coupled dynamic bias boosting circuit for a power amplifier |
| 04/08/2009 | CN100477494C High power Doherty amplifier |
| 04/08/2009 | CN100477493C Improved power amplifier configuration |
| 04/08/2009 | CN100477492C Electronic device with sound output device |
| 04/08/2009 | CN100476679C Precision chopper-stabilized current mirror |
| 04/07/2009 | US7515179 Method for integrating image sensor |
| 04/07/2009 | US7514996 Distortion compensation amplifying apparatus |
| 04/02/2009 | WO2009042417A1 Offset cancellation in a capacitively coupled amplifier |
| 04/02/2009 | WO2009041428A1 Radio communication device and radio communication device transmission control method |
| 04/02/2009 | WO2009041097A1 Power amplifier circuit, and transmitter and wireless communication device using the same |
| 04/02/2009 | WO2009041096A1 Power amplifying circuit, and transmitter and wireless communication device using the same |
| 04/02/2009 | WO2009041094A1 Amplifying device |
| 04/02/2009 | WO2009041043A1 Transmission device |
| 04/02/2009 | WO2005084371A3 Programmable gain amplifier with hybrid digital/analog architecture |
| 04/02/2009 | WO2005031984A3 Method and apparatus to compensate am-pm delay mismatch in envelope restoration transmitter |
| 04/02/2009 | US20090086072 DUAL CDS/PxGA CIRCUIT |