| 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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| 04/02/2009 | US20090085670 Multiband output impedance matching circuit having passive devices, amplifier including multiband input impedance matching circuit having passive devices, and amplifier including multiband input/output impedance matching circuit having passive devices |
| 04/02/2009 | US20090085668 Inductor Sharing in Radio Frequency Communications |
| 04/02/2009 | US20090085664 Power amplifier having an adaptive amplifying mechanism |
| 04/02/2009 | US20090085658 Analog power amplifier predistortion methods and apparatus |
| 04/02/2009 | US20090085657 Compensation of field effect on polycrystalline resistors |
| 04/02/2009 | DE10303055B4 FET-Verstärker mit Temperatur-Kompensationsschaltung FET amplifier with temperature compensation circuit |
| 04/02/2009 | DE102004058595B4 Treiberschaltung und Verfahren zur Kompensation von Offsetströmen in einer Treiberschaltung Driver circuit and method of compensating for offset currents in a driver circuit |
| 04/01/2009 | EP2043258A1 A method for signal amplification, a switched mode amplifier system, a base station and a communication network therefor |
| 04/01/2009 | EP2041867A2 Amplifier employing interleaved signals for pwm ripple suppression |
| 04/01/2009 | EP2041865A1 Controlling switching mode power supply of power amplifier |
| 04/01/2009 | EP1652295A4 Temperature-insensitive bias circuit for high-power amplifiers |
| 04/01/2009 | EP1579571B1 Phase corrected miller compensation of chopper and nested chopper amplifiers |
| 04/01/2009 | CN201215589Y Multi-path low noise charge sensitive amplifier circuit system for deep space detection |
| 04/01/2009 | CN101401299A Apparatus for and method of biasing a transistor |
| 04/01/2009 | CN101399559A Sound signal processing device |
| 04/01/2009 | CN101399521A Apparatus and method for supplying power to an inductive load |
| 04/01/2009 | CN100474763C Power amplifier clipping circuit for minimized output of distortion |
| 04/01/2009 | CN100474762C Power amplifying device for communication system |
| 04/01/2009 | CN100474761C Intelligent control system and method for carrier cancellation in feedforward linear power amplifier |
| 04/01/2009 | CN100474760C Miller-compensated amplifier |
| 04/01/2009 | CN100474759C Circuit and method for providing an auto-off and/or auto-on capability for an audio device |
| 04/01/2009 | CN100474619C High voltage operating field effect transistor, bias circuit therefor and high voltage circuit thereof |
| 03/31/2009 | US7512422 RF generator with commutation inductor |
| 03/31/2009 | US7512387 Method and control system for controlling the output power of an RF amplifier system |
| 03/31/2009 | US7512386 Method and apparatus providing integrated load matching using adaptive power amplifier compensation |
| 03/31/2009 | US7512189 Lower complexity layered modulation signal processor |
| 03/31/2009 | US7511578 Stacked RF power amplifier |
| 03/31/2009 | US7511574 Predistorter |
| 03/31/2009 | US7511573 Input/output signals preserver circuit of amplification circuits |
| 03/31/2009 | US7511572 High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage |
| 03/31/2009 | US7511571 Single-ended screen-regulated cathode-follower output stage for high-fidelity music amplifier |
| 03/31/2009 | US7511565 Integrated circuit apparatus and method of compensating a current |
| 03/26/2009 | WO2009037995A1 High output power amplifier, wireless transmitter, wireless transmitting and receiving device, and high output power amplifier mounting method |
| 03/26/2009 | WO2005018088A3 Low power consumption adaptive power amplifier |
| 03/26/2009 | US20090079524 Multi-band tunable resonant circuit |
| 03/25/2009 | EP2040375A1 Power amplifier module and method of generating a drain voltage for a power amplifier |
| 03/25/2009 | EP2039001A2 Load-line adaptation |
| 03/25/2009 | EP2038999A2 Method and apparatus for providing adaptive supply voltage control of a power amplifier |
| 03/25/2009 | EP2038998A2 Dynamic performance control of broadband tuner |
| 03/25/2009 | EP1683269B1 Electronically programmable multimode circuit |
| 03/25/2009 | CN101394680A Special integrated circuit for multi-channel audio amplification |
| 03/25/2009 | CN101394191A Low noise amplifier module and radio communication apparatus |
| 03/25/2009 | CN101394153A Class D amplifier circuit |
| 03/25/2009 | CN101394152A Radio frequency power amplifier circuit |
| 03/25/2009 | CN101394151A Automatic gain compensation and linear control method and device for power amplifier |
| 03/25/2009 | CN101394131A Switching regulator control circuit, switching regulator and switching regulator control method |
| 03/25/2009 | CN100472958C Linear amplifier |
| 03/25/2009 | CN100472954C Amplifier circuit |
| 03/25/2009 | CN100472952C Current-controlled CMOS delay cell with variable bandwidth |
| 03/25/2009 | CN100472951C Multi-band lookup table type predistorter |
| 03/25/2009 | CN100472950C Method for reducing spurious emission of amplified signals and amplifier system |
| 03/25/2009 | CN100472949C Method for performing pre-distortion to amplified signals and device thereof |
| 03/25/2009 | CN100472948C Forward amplifiers and operation method thereof |
| 03/25/2009 | CN100472947C Current-controlled complementary metal oxide semiconductor wideband data amplifier circuit |
| 03/25/2009 | CN100472946C Digital power amplifier adapted for low-voltage carrier communication |
| 03/25/2009 | CN100472945C User unit of bias power amplifier and method |
| 03/25/2009 | CN100472944C Multistage amplifier and method for improving power efficiency of the multistage amplifier |
| 03/25/2009 | CN100472943C Method of preventing power amplifier from leakage after power drop and power amplifier |
| 03/24/2009 | US7509105 Radio frequency excitation arrangement including a limiting circuit |
| 03/24/2009 | US7509100 Antenna interface unit |
| 03/24/2009 | US7508885 Digitally convertible radio |
| 03/24/2009 | US7508260 Bypassable low noise amplifier topology with multi-tap transformer |
| 03/24/2009 | US7508259 Differential amplifier and data driver for display |
| 03/24/2009 | US7508258 Amplifier circuit |
| 03/24/2009 | CA2508156C Sonar transmitter |
| 03/19/2009 | WO2009036134A1 Low-loss interface |
| 03/19/2009 | WO2009035767A1 Input circuitry for transistor power amplifier and method for designing such circuitry |
| 03/19/2009 | WO2009035665A1 Improved low power, low noise amplifier system |
| 03/19/2009 | WO2009034935A1 Semiconductor device |
| 03/19/2009 | WO2009034659A1 Tunable impedance matching circuit |
| 03/19/2009 | WO2008150734A4 Method and apparatus for providing a cartesian training waveform |
| 03/19/2009 | US20090072906 High frequency power amplifier circuit and electronic component for high frequency power amplifier |
| 03/19/2009 | US20090072901 Power amplifier |
| 03/19/2009 | US20090072900 Apparatus and method for compensating for nonlinearity in portable communication terminal |
| 03/19/2009 | US20090072899 Sharing operational amplifier between two stages of pipelined adc and/or two channels of signal processing circuitry |
| 03/19/2009 | DE102007048454B3 Electronic device, has current mirror transistors and power sources extracting currents from respective output nodes and designed such that one of currents about portion corresponding to leakage current is higher than other current |
| 03/19/2009 | DE102004045709B4 Verfahren zur Einstellung eines Verstärkers und Verstärkerschaltung A method of adjusting an amplifier and amplifier circuit |
| 03/18/2009 | EP2037587A1 Transmission circuit and communication device |
| 03/18/2009 | EP2037576A2 Method of automatically adapting the impedance of a radiofrequency circuit and emission or reception instrumentation with automatic adaptation |
| 03/18/2009 | EP2037573A1 Ultra-low power consumption low noise amplifier |
| 03/18/2009 | EP2037572A1 Ultra-low power consumption current-reused front-end for a RF system |
| 03/18/2009 | EP2037465A1 Double LC-tank structure |
| 03/18/2009 | EP2036285A2 Remote non-linearity detection via burst power dithering |
| 03/18/2009 | EP1756940A4 System and method for control of loop alignment in adaptive feed forward amplifiers |
| 03/18/2009 | EP1751853A4 A tuneable circuit for canceling third order modulation |
| 03/18/2009 | EP1573906B1 Preserving linearity of an isolator-free power amplifier by dynamically adjusting gain and phase |
| 03/18/2009 | CN201210667Y Electronic tube type audio amplifier |
| 03/18/2009 | CN101390441A Audio circuit |
| 03/18/2009 | CN101390285A Polar coordinate modulated transmission device, adaptive distortion compensation processing system, polar coordinate modulated transmission method, and adaptive distortion compensation processing meth |
| 03/18/2009 | CN101388706A Highly efficient ultra-linear DFFA mobile wideband communication power amplifier |
| 03/18/2009 | CN101388649A Low non-linear power amplifier |
| 03/18/2009 | CN101388648A Multi-frequency multi-mode power amplifier and operating method thereof |
| 03/18/2009 | CN100471063C Bias-voltage circuit for use on sound source amplifier |
| 03/18/2009 | CN100471054C Differential amplifier circuit and drive circuit of liquid crystal display unit using the same |
| 03/18/2009 | CN100471051C Low voltage negative feedback transconductance amplifier |
| 03/18/2009 | CN100471050C Lower voltage conductor-spanning amplifier capable of improving the linearity and input range |
| 03/18/2009 | CN100471049C Digital predistorter and predistortion method therefor |
| 03/18/2009 | CN100471048C Multi carrier power amplifier in wireless communication system |
| 03/18/2009 | CN100471047C Method for producing a transmission signal |
| 03/18/2009 | CN100471046C A differential amplifier |