| 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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| 09/18/2008 | US20080224771 Compensation for Parasitic Coupling Between Rf or Microwave Transistors in the Same Package |
| 09/18/2008 | US20080224770 Active circuits with isolation switches |
| 09/18/2008 | US20080224768 Operational Amplifier Capable of Compensating Offset Voltage |
| 09/18/2008 | CA2656447A1 Ofdm-modulated-wave output unit and distortion compensating method |
| 09/17/2008 | EP1971024A2 Television set and audio output unit |
| 09/17/2008 | EP1971023A1 Suppression of high-frequency perturbations in pulse-width modulation |
| 09/17/2008 | EP1969718A1 Amplifier with compensated gate bias |
| 09/17/2008 | EP1236229B1 Circuit for protection of differential amplifier inputs against electrostatic discharge |
| 09/17/2008 | EP1117328B1 Methods, systems, and associated implantable devices for dynamic monitoring of tumors |
| 09/17/2008 | CN201118524Y Micro-wave low band ultra-micro frequency selection amplification module |
| 09/17/2008 | CN201117778Y Microwave low wave range super miniature ¿Ctype balanced amplifier |
| 09/17/2008 | CN101267193A Semiconductor integrated circuit performing a voltage comparison and preventing deterioration of voltage comparison accuracy |
| 09/17/2008 | CN101267187A A self-adapted pre-distortion method and system for broadband linear power amplifier |
| 09/17/2008 | CN101267100A Exception protection device for negative and positive dual power supply circuit |
| 09/17/2008 | CN100420156C System and method for eliminating signal zero crossings in single and multiple channel communication systems |
| 09/17/2008 | CN100420151C Amplifier |
| 09/17/2008 | CN100420150C Offset calibration system and method for a high gain signal channel |
| 09/17/2008 | CN100419445C Offset compensation circuit for a monitoring photodiode |
| 09/17/2008 | CN100419440C Low-loss tunable ferro-electric device and method of characterization |
| 09/16/2008 | US7426674 Method of computing partial CRCs |
| 09/16/2008 | US7425871 Compensation units for reducing the effects of self-heating and increasing linear performance in bipolar transistors |
| 09/16/2008 | US7425869 Distributed circular geometry power amplifier architecture |
| 09/12/2008 | WO2008109268A1 Rf power amplifier protection |
| 09/12/2008 | WO2008107990A1 Power amplifier |
| 09/12/2008 | WO2008107849A1 Signal processor comprising a reference voltage circuit |
| 09/12/2008 | WO2008107833A1 A method to improve a linearity of a rf transfer characteristic of a modulating rf amplifier |
| 09/12/2008 | WO2008107210A2 Electronic circuit for the transmission of high-frequency signals |
| 09/12/2008 | WO2008106822A1 Method for resistance combining double sampling loop negative feedback and amplifier thereof |
| 09/12/2008 | WO2008067891A3 Doherty amplifier system |
| 09/12/2008 | WO2008054705A3 Low noise amplifier having improved linearity |
| 09/11/2008 | US20080222488 method of computing partial crcs |
| 09/11/2008 | US20080218631 Television set and audio output unit |
| 09/11/2008 | US20080218271 Rf power amplifier protection |
| 09/11/2008 | US20080218263 Wideband differential amplifier including single-ended amplifiers coupled to a four-port transformer |
| 09/11/2008 | US20080218262 Predistortion with asymmetric usage of available bandwidth |
| 09/11/2008 | US20080218259 Method and apparatus for distortion of audio signals and emulation of vacuum tube amplifiers |
| 09/11/2008 | DE102008010963A1 Pufferschaltkreis Buffer circuit |
| 09/11/2008 | DE102007011715A1 Verstärkeranordnung und Verfahren zum Verstärken eines Signals An amplifier arrangement and method for amplifying a signal |
| 09/11/2008 | DE102004047684B4 Sendeeinrichtung mit digitaler Vorverzerrung und Verfahren zur Regelung einer Vorverzerrung in einer Sendeeinrichtung Transmitting means with digital predistortion and method for controlling a predistortion in a transmitter |
| 09/10/2008 | EP1966884A1 Efficient composite amplifier |
| 09/10/2008 | EP1446871B1 Digital linearization circuit |
| 09/10/2008 | EP1275200B1 Method and apparatus for dynamic sound optimization |
| 09/10/2008 | CN201114163Y Peak clipping device for lowering transmitted signal PAR |
| 09/10/2008 | CN201113928Y Sound control device |
| 09/10/2008 | CN201113926Y Intermediate frequency pre-amplifying circuit |
| 09/10/2008 | CN201113925Y Digital message amplifier |
| 09/10/2008 | CN101262457A A time division duplex linear power amplification module with digital pre-distortion technology |
| 09/10/2008 | CN101262262A Power amplifier circuit, control method thereof and control program thereof |
| 09/10/2008 | CN101262207A Rail-to-rail amplifier circuit and semiconductor device |
| 09/10/2008 | CN101262205A Predistortion with asymmetric usage of available bandwidth |
| 09/10/2008 | CN101262204A Voltage control circuit and gain-variable amplifier |
| 09/10/2008 | CN101262203A Audio output circuit and audio output method |
| 09/10/2008 | CN100418305C Method and apparatus for compensating phase errors in a base station |
| 09/10/2008 | CN100418304C Transmission device and adjustment method thereof |
| 09/10/2008 | CN100417880C Acoustic quality improvement circuit for Internet electric refrigerator |
| 09/09/2008 | US7424406 Filter characteristic measuring method and system |
| 09/09/2008 | US7424404 Method for determining the envelope curve of a modulated signal in time domain |
| 09/09/2008 | US7423698 Amplifier for amplifying input signal such as video signal and outputting amplified signal |
| 09/09/2008 | US7423491 Semiconductor amplifier |
| 09/09/2008 | US7423489 Low return loss resistive feedback amplifier |
| 09/09/2008 | US7423484 Adaptive predistortion for a transmit system with gain, phase and delay adjustments |
| 09/09/2008 | US7423482 Circuit configuration having a feedback operational amplifier |
| 09/09/2008 | US7423481 Amplifier arrangement and amplifying method |
| 09/09/2008 | US7423480 AC amplifier for precision measurement |
| 09/09/2008 | US7423479 Offset canceller for compensating for offset in signal output |
| 09/09/2008 | US7423478 Input offset voltage corrector |
| 09/04/2008 | WO2008106364A1 Linearization of rf power amplifiers using an adaptive subband predistorter |
| 09/04/2008 | WO2008105985A1 Power combiner |
| 09/04/2008 | WO2008105701A1 Radio communications using scheduled power amplifier backoff |
| 09/04/2008 | WO2008105073A1 Transmitter |
| 09/04/2008 | WO2008105072A1 Transmitter |
| 09/04/2008 | US20080215291 Complex signal decomposition and modeling |
| 09/04/2008 | US20080211606 Temperature compensation attenuator |
| 09/04/2008 | US20080211594 Multi-Channel Pulse Modulator System |
| 09/04/2008 | US20080211585 Adaptive Protection Circuit For a Power Amplifier |
| 09/04/2008 | US20080211582 Wide-band adjustable gain low-noise amplifier |
| 09/04/2008 | US20080211576 Linearization of RF Power Amplifiers Using an Adaptive Subband Predistorter |
| 09/04/2008 | US20080211575 Loop Gain Equalizer For Rf Power Amplifier |
| 09/04/2008 | US20080211574 Chopper-stabilized instrumentation amplifier |
| 09/04/2008 | US20080211565 Mute Circuit |
| 09/04/2008 | CA2781646A1 Sps receiver with adjustable linearity |
| 09/03/2008 | EP1965434A2 Compound semiconductor device and doherty amplifier using compound semiconductor device |
| 09/03/2008 | EP1964207A2 Amplifying a transmit signal using a fractional power amplifier |
| 09/03/2008 | EP1847013A4 Variable bandwidth envelope modulator for use with envelope elimination and restoration transmitter architecture and method |
| 09/03/2008 | EP1693955B1 Dynamic bias for RF power amplifiers |
| 09/03/2008 | EP1639699B1 Output power detection circuit |
| 09/03/2008 | EP1599937A4 Method and apparatus for controlling the output power of a power amplifier |
| 09/03/2008 | EP1466406B1 Direct Conversion Receiver with Bias Control and Bypassing of Amplifiers at High Receive Levels |
| 09/03/2008 | EP1352466B1 A fully differential, variable-gain amplifier and a multidimensional amplifier arrangement |
| 09/03/2008 | CN101258674A Origami cascaded topology for analog and mixed-signal applications |
| 09/03/2008 | CN101257329A Method and system for controlling circuit in emitter |
| 09/03/2008 | CN101257283A Apparatus and method for realizing digital predistortion |
| 09/03/2008 | CN100417016C Shock-wave noise preventing circuit |
| 09/02/2008 | US7421376 Comparison of data signals using characteristic electronic thumbprints |
| 09/02/2008 | US7421256 Low noise switching voltage regulator |
| 09/02/2008 | US7421254 High linearity, high efficiency power amplifier with DSP assisted linearity optimization |
| 09/02/2008 | US7420420 FET bias circuit |
| 09/02/2008 | US7420416 Tunable predistorter |
| 09/02/2008 | US7420415 Method and apparatus for controlling a power amplifier in a mobile communication system |
| 09/02/2008 | US7420412 Multiple power mode amplifier with bias modulation option and without bypass switches |