| 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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| 03/09/2004 | US6703897 Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers |
| 03/09/2004 | US6703872 High speed, high common mode range, low delay comparator input stage |
| 03/09/2004 | US6703864 Buffer circuit |
| 03/09/2004 | US6703682 High sheet MOS resistor method and apparatus |
| 03/09/2004 | US6703678 Schottky barrier field effect transistor large in withstanding voltage and small in distortion and return-loss |
| 03/04/2004 | WO2004019487A1 Digital amplification device |
| 03/04/2004 | WO2004019486A1 A power amplifier system |
| 03/04/2004 | WO2004019484A2 Enhanced efficiency ldmos based feed forward amplifier |
| 03/04/2004 | WO2004019483A2 Providing dc isolation in switching amplifiers |
| 03/04/2004 | US20040043750 LPA shelf and LPA type switching method for a mobile communication base station |
| 03/04/2004 | US20040042559 Method for scaling peak power amplitudes in a signal and corresponding transmitter |
| 03/04/2004 | US20040041658 Microwave power amplifier |
| 03/04/2004 | US20040041634 High-frequency power amplifier |
| 03/04/2004 | US20040041633 System to reduce unwanted oscillations in high speed, high gain or transimpedance amplifiers |
| 03/04/2004 | US20040041631 Class-A amplifier circuit having output voltage varied according to input voltage |
| 03/04/2004 | US20040041629 Feedforward amplifier and method of improving the performance thereof |
| 03/04/2004 | US20040041628 Distortion compensator |
| 03/04/2004 | US20040041627 Doherty amplifier |
| 03/04/2004 | US20040041626 Digital power amplifier |
| 03/04/2004 | DE10337268A1 Hocheffizienter Leistungsverstärker High-efficiency power amplifier |
| 03/04/2004 | CA2495528A1 Enhanced efficiency ldmos based feed forward amplifier |
| 03/03/2004 | EP1394954A2 Transmitter |
| 03/03/2004 | EP1394934A2 Digital power amplifier |
| 03/03/2004 | EP1394932A1 Doherty Amplifier |
| 03/03/2004 | EP1393437A2 Method and apparatus for compensation of second order distortion |
| 03/03/2004 | EP1393403A2 Tunable phase shifter and applications for same |
| 03/03/2004 | EP1192711B1 Biasing circuit for vgs drift compensation and thermal compensation of a power device |
| 03/03/2004 | EP1004165B1 Active operating point regulation for power amplifiers |
| 03/03/2004 | EP0962120B1 High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 03/03/2004 | EP0941575B1 Efficient parallel-stage power amplifier |
| 03/03/2004 | EP0903009A4 Hybrid matrix amplifier with noise reduction |
| 03/03/2004 | CN1479902A System and method for mining work flow |
| 03/03/2004 | CN1479552A 多赫尔蒂放大器 Doherty amplifier |
| 03/03/2004 | CN1479543A Linear power amplifier rack of mobile communication base station and its switchover method of the type |
| 03/03/2004 | CN1140962C Operating amplifier with current feedback |
| 03/02/2004 | US6701138 Power amplifier control |
| 03/02/2004 | US6701134 Increased dynamic range for power amplifiers used with polar modulation |
| 03/02/2004 | US6700792 High-frequency composite component and portable wireless device incorporating the component |
| 03/02/2004 | US6700444 N-way RF power amplifier with increased backoff power and power added efficiency |
| 03/02/2004 | US6700442 N way phase cancellation power amplifier |
| 03/02/2004 | US6700441 Method and apparatus for reduction of distortion in a feed forward amplifier |
| 03/02/2004 | US6700440 High frequency power amplifier |
| 03/02/2004 | US6700439 Zero-bias bypass switch |
| 02/26/2004 | WO2004017512A1 High power doherty amplifier |
| 02/26/2004 | WO2003081833B1 Floating-gate analog circuit |
| 02/26/2004 | WO2003052992A3 Feedforward notch filter |
| 02/26/2004 | WO2003019774A3 High frequency power amplifier circuit |
| 02/26/2004 | WO2002058249A3 High efficiency wideband linear wireless power amplifier |
| 02/26/2004 | WO2001063791A3 Transmitter and receiver circuit |
| 02/26/2004 | US20040038696 Transmitter |
| 02/26/2004 | US20040038662 Reducing active mixer flicker noise |
| 02/26/2004 | US20040037443 Hearing aid, and method for reducing feedback therein |
| 02/26/2004 | US20040037364 Device for producing a phase and amplitude modulated radio frequency signal |
| 02/26/2004 | US20040036670 Circuit and method for driving a liquid crystal display device using low power |
| 02/26/2004 | US20040036534 Wideband CMOS gain stage |
| 02/26/2004 | US20040036533 Providing DC isolation in switching amplifiers |
| 02/26/2004 | US20040036532 Enhanced efficiency LDMOS based feed forward amplifier |
| 02/26/2004 | US20040036530 Amplifier circuit, transmission device, amplification method, and transmission method |
| 02/26/2004 | US20040036523 Two-input/two-output broadband active selector switch with distributed structure, and phase control device comprising such a switch |
| 02/26/2004 | DE10236861A1 Verstärker mit präzise digital stellbaren Parametern Amplifier with digitally adjustable precision parameters |
| 02/25/2004 | EP1391987A1 Reflection loss suppression circuit |
| 02/25/2004 | EP1391985A2 Wideband cmos gain stage |
| 02/25/2004 | EP1391046A2 Non-linear transistor circuits with thermal stability |
| 02/25/2004 | EP1390885A2 Data processing system |
| 02/25/2004 | CN2604826Y Temperature compensator for power amplifier gain control |
| 02/25/2004 | CN1478327A 接收机 Receiver |
| 02/25/2004 | CN1478322A Adjustment of bias current in first integrated circuit based on signal gain of second integrated circuit |
| 02/25/2004 | CN1478321A Amplifier linearisation |
| 02/25/2004 | CN1478320A DC-coupling method for current mode circuits |
| 02/25/2004 | CN1477783A High-efficiency power amplifier system and method for producing high-efficiency amplification output |
| 02/24/2004 | US6697436 Transmission antenna array system with predistortion |
| 02/24/2004 | US6696896 Method for implementing high frequency programmable poles and zeros in disk drive preamplifiers |
| 02/24/2004 | US6696891 Class D amplifier |
| 02/24/2004 | US6696890 Differential signal transfer circuit |
| 02/24/2004 | US6696877 Level shift circuit |
| 02/24/2004 | US6696866 Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal |
| 02/24/2004 | US6696711 Semiconductor device and power amplifier using the same |
| 02/19/2004 | WO2004015860A2 Ring triggered mute |
| 02/19/2004 | WO2004015859A2 Variable gain amplifier with improved control characteristics linearity |
| 02/19/2004 | WO2004015854A2 Monolithic, software-definable circuit including a power amplifier |
| 02/19/2004 | WO2003030354A3 A spurious ratio control circuit for use with feed-forward linear amplifiers |
| 02/19/2004 | WO2003017478A3 Feed forward compensation circuit |
| 02/19/2004 | US20040032700 Base bias circuit, and power amplifier using the base bias circuit |
| 02/19/2004 | US20040032298 Circuit configuration for producing exponential predistortion for a variable amplifier |
| 02/19/2004 | US20040032297 Pre-distortion of non-linear devices by post-detection |
| 02/19/2004 | US20040032296 Nonlinear distortion compensation power amplifier |
| 02/19/2004 | DE20215600U1 Symmetrical amplifier concept based upon a pair of coupled differencing amplifiers |
| 02/19/2004 | DE10247034B3 Adaptive pre-attenuation method for digital data values for communications device end stage has pre-attenuation values provided by value table updated by evaluating feedback signal values |
| 02/18/2004 | EP1389899A1 Portable power amplifier |
| 02/18/2004 | EP0767622B1 Electrical power amplifier for continuous cardiac output monitoring |
| 02/18/2004 | CN1476679A Self-tuned millimeter wave RF transceiver module |
| 02/18/2004 | CN1476163A Method and device for operating emission amplifier |
| 02/18/2004 | CN1476162A Distortion compensator |
| 02/18/2004 | CN1139182C High frequency variable gain amplifier device and wireless communication terminal |
| 02/17/2004 | US6694130 System and method for dynamically varying operational parameters of an amplifier |
| 02/17/2004 | US6693974 Adaptive digital pre-distortion circuit using adjacent channel power profile and method of operation |
| 02/17/2004 | US6693956 Power amplifier having negative feedback circuit for transmitter |
| 02/17/2004 | US6693493 Single-ended differential circuit using complementary devices |
| 02/17/2004 | US6693492 Variable gain low-noise amplifier and method |
| 02/17/2004 | US6693487 Signal processing circuit for floating signal sources using positive feedback |