| 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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| 07/08/2008 | US7397303 Vacuum tube circuit |
| 07/08/2008 | US7397302 Variable gain amplifier |
| 07/08/2008 | US7396336 Switched resonant ultrasonic power amplifier system |
| 07/08/2008 | US7395644 Inserting apparatus and method with controlled, master cycle speed-dependent actuator operations |
| 07/03/2008 | WO2008079454A1 Power amplifier bias control |
| 07/03/2008 | WO2008078565A1 Power amplifier |
| 07/03/2008 | WO2008078468A1 Transmitting device and communication device |
| 07/03/2008 | WO2008077417A1 An amplification apparatus |
| 07/03/2008 | WO2008054766A3 System and method for pre-charging a current mirror |
| 07/03/2008 | WO2007087108A3 Wireless communication unit and method of characterizing a power amplifier |
| 07/03/2008 | WO2007059484A3 Linear rf transmitter and method of operation |
| 07/03/2008 | US20080160935 IQ-Modulator Pre-Distortion |
| 07/03/2008 | US20080159365 Analog Conditioning of Bioelectric Signals |
| 07/03/2008 | US20080157876 Low strain variable frequency amplifier |
| 07/03/2008 | US20080157871 Predistortion linearization device with adjustable amplitude and shape |
| 07/03/2008 | US20080157870 Strategically selecting data captures for signal predistortion |
| 07/03/2008 | US20080157869 Strategic predistortion function selection |
| 07/03/2008 | CA2672949A1 An amplification apparatus |
| 07/02/2008 | EP1940019A1 Linearisation device with pre-distortion with adjustable amplitude and curve |
| 07/02/2008 | EP1939648A2 Automotive radar systems and techniques |
| 07/02/2008 | EP1938454A2 Soft-start circuit and method for power-up of an amplifier circuit |
| 07/02/2008 | EP1938451A1 Device and method for amplifying pulsed rf signals |
| 07/02/2008 | EP1782532B1 A method of controlling a linear power amplifier |
| 07/02/2008 | CN101212206A Method for handling nonlinear pre-distortion of amplifier |
| 07/02/2008 | CN101212205A Voltage fluctuation compensator for audio frequency output amplifier |
| 07/02/2008 | CN101212204A Power supply device for audio system and the audio system |
| 07/02/2008 | CN100399714C Mobile communication terminal with adjustable driving voltage of power amplifier and control method thereof |
| 07/01/2008 | US7395038 High-efficiency modulating RF amplifier |
| 07/01/2008 | US7394635 Current detection circuit and protection circuit |
| 07/01/2008 | US7394430 Wireless device reconfigurable radiation desensitivity bracket systems and methods |
| 07/01/2008 | US7394317 Amplifying circuit having bias voltage setting mechanism |
| 07/01/2008 | US7394313 Multiple power mode amplifier with bias modulation option and without bypass switches |
| 07/01/2008 | US7394312 Re-configurable amplifier protection apparatus and method |
| 07/01/2008 | US7394309 Balanced offset compensation circuit |
| 06/26/2008 | WO2008076233A1 Method and apparatus for a nonlinear feedback control system |
| 06/26/2008 | WO2008076021A1 Pulse width modulator |
| 06/26/2008 | WO2008075561A1 Power amplification device |
| 06/26/2008 | WO2008075306A1 True current limiting (tcl) |
| 06/26/2008 | WO2008075018A1 Uwb amplifier |
| 06/26/2008 | US20080153438 Transmission Device, Transmission Power Control Method, and Radio Communication Device |
| 06/26/2008 | US20080150774 Non-Linear Processing of Signals |
| 06/26/2008 | US20080150631 Biosignal amplifying device |
| 06/25/2008 | EP1936799A1 Parallel phase and amplitude analog predistorsion linearizer with fixed in advance intermodulation power and gain stabilization |
| 06/25/2008 | EP1936689A1 Deep sub-micron MOS preamplifier with thick-oxide input stage transistor |
| 06/25/2008 | EP1935128A2 Closed-loop receiver feedback pre-distortion |
| 06/25/2008 | EP1935091A2 Systems and methods for transferring single-ended burst signal onto differential lines, especially for use in burst-mode receiver |
| 06/25/2008 | EP1935090A1 Electronic device with an amplifier output stage and an over-current detection means |
| 06/25/2008 | EP1935089A2 Systems, methods and devices for dual closed loop modulation controller for nonlinear rf amplifier |
| 06/25/2008 | CN101208859A High frequency power amplifier distortion compensation device |
| 06/25/2008 | CN101207366A High efficiency power amplifier |
| 06/25/2008 | CN101207365A Gain bootstrap operational amplifier |
| 06/25/2008 | CN100397279C Current leakage compensator and its compensating method |
| 06/24/2008 | US7392033 Reducing active mixer flicker noise |
| 06/24/2008 | US7392020 Table reference type predistorter |
| 06/24/2008 | US7391822 Method and apparatus for estimating a sample delay between a transmission signal and a feedback signal in a mobile communication system, and a base station transmitter using the same |
| 06/24/2008 | US7391370 Method and apparatus for adaptive direction estimation of radio waves |
| 06/24/2008 | US7391267 Output circuit |
| 06/24/2008 | US7391260 Variable gain amplifier and variable gain amplifier module |
| 06/24/2008 | US7391259 Power amplifier |
| 06/24/2008 | US7391258 Self-oscillating power circuit |
| 06/24/2008 | US7391257 Chopper-stabilized instrumentation amplifier for impedance measurement |
| 06/24/2008 | US7391256 System and method for DC correction in wireless receivers |
| 06/24/2008 | US7391253 Power saving semiconductor integrated circuit device |
| 06/19/2008 | WO2008072700A1 Transmission device |
| 06/19/2008 | WO2008072212A1 Extra power stage added for pop elimination |
| 06/19/2008 | WO2008072134A1 A high efficiency modulating rf amplifier |
| 06/19/2008 | WO2008042202A3 Adaptive self-linearization |
| 06/19/2008 | US20080146168 Methods of Enhancing Power Amplifier Linearity |
| 06/18/2008 | EP1932308A2 Amplifier system employing analog polynomial predistortion with sub-nyquist digital adaptation |
| 06/18/2008 | EP1932234A2 System and method for increasing accuracy of transmitter power detection over a larger range of output power levels |
| 06/18/2008 | EP1872472A4 Adaptive predistortion linearized amplifier system employing selective sampling |
| 06/18/2008 | CN101204008A Buffer circuit |
| 06/18/2008 | CN101204007A Apparatus for removing distortions created by an amplifier |
| 06/18/2008 | CN101202535A Control method of new type digital audio power amplifier |
| 06/18/2008 | CN101202534A Audio frequency apparatus and silencing apparatus |
| 06/18/2008 | CN100396128C Multi-mode digital linearization device and method |
| 06/17/2008 | US7389101 Use of analog-valued floating-gate transistors for parallel and serial signal processing |
| 06/17/2008 | US7389091 High-frequency amplification circuit |
| 06/17/2008 | US7389056 Preamplifier circuit, clock switching circuit, and optical receiver |
| 06/17/2008 | US7388435 Linearized trans-impedance amplifier |
| 06/17/2008 | US7388430 Enhanced digital predistortion |
| 06/17/2008 | US7388429 Amplifier circuit, control method of the same, and amplifier circuit module |
| 06/17/2008 | US7388427 Multiple power mode amplifier with bias modulation option and without bypass switches |
| 06/17/2008 | US7388425 PWM digital amplifier with high-order loop filter |
| 06/12/2008 | WO2008069899A1 Temperature compensation of collector-voltage control rf amplifiers |
| 06/12/2008 | WO2008069436A1 Intermodulation signal generator of power amplifier and pre-distortion linearizer having the same |
| 06/12/2008 | WO2008068809A1 High frequency amplifier |
| 06/12/2008 | WO2008067891A2 Doherty amplifier system |
| 06/12/2008 | WO2008048530A3 Optimized uplink efficiencies for transmission of satellite data |
| 06/12/2008 | WO2008013615A3 Fast charge circuit for use in amplifiers |
| 06/12/2008 | WO2007122457A3 Adaptive pre-distortion |
| 06/12/2008 | US20080137770 Method and System for Compensating for Estimated Distortion in a Transmitter By Utilizing a Digital Predistortion Scheme With A Quadrature Feedback Mixer Configuration |
| 06/12/2008 | US20080136527 High Impedance Circuit |
| 06/12/2008 | US20080136525 Current pre-amplifier and associated current comparator |
| 06/12/2008 | US20080136518 Feed-forward amplifier |
| 06/12/2008 | US20080136517 Method and apparatus for periodic noise suppression in transient signals |
| 06/12/2008 | US20080136513 Power-efficient automatic gain control |
| 06/12/2008 | US20080136512 Dual-mode, dual-load high efficiency RF power amplifier |
| 06/12/2008 | US20080136511 Method and system for fast calibration to cancel phase feedthrough |
| 06/12/2008 | CA2646633A1 Doherty amplifier system |