| 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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| 08/18/2009 | US7576607 Multi-segment primary and multi-turn secondary transformer for power amplifier systems |
| 08/18/2009 | US7576603 Arrangement for canceling offset of an operational amplifier |
| 08/18/2009 | US7576602 Circuit utilizing op-sharing technique and related method thereof |
| 08/18/2009 | US7576594 Method and device for reducing influence of early effect |
| 08/13/2009 | WO2009100387A1 Lna having a post-distortion mode and a high-gain mode |
| 08/13/2009 | WO2009100381A1 Multi-mode power amplifiers |
| 08/13/2009 | WO2009100096A2 Multi-mode high efficiency linear power amplifier |
| 08/13/2009 | WO2009099904A2 System and method of reducing click and pop noise in audio playback devices |
| 08/13/2009 | WO2009099056A1 Envelope tracking power supply circuit and high-frequency amplifier including envelope tracking power supply circuit |
| 08/13/2009 | WO2009098609A1 Load detector for a switching device |
| 08/13/2009 | WO2009061817A3 Apparatus and method for low power rail-to- rail operational amplifier |
| 08/13/2009 | US20090201085 Power amplifying apparatus and mobile communication terminal |
| 08/13/2009 | US20090201084 Multi-mode power amplifiers |
| 08/12/2009 | EP2087598A1 Current comsumption reduction with low power amplifier |
| 08/12/2009 | EP2087586A1 Switched modulation of a radio-frequency amplifier |
| 08/12/2009 | EP2013630A4 Systems and methods of rf power transmission, modulation, and amplification |
| 08/12/2009 | EP1673857B1 Data signal amplifier and processor with multiple signal gains for increased dynamic signal range |
| 08/12/2009 | EP1665699A4 Dual mode multi-slot egprs transmitter |
| 08/12/2009 | EP1646153B1 Activation signal output circuit |
| 08/12/2009 | EP1436737A4 Workflow mining system and method |
| 08/12/2009 | EP1374389B1 System and method for rf signal amplification |
| 08/12/2009 | EP1262017B1 Spectral distortion monitor for controlling pre-distortion and feed-forward linearization of rf power amplifier |
| 08/12/2009 | EP1245078B9 Power amplifier and a method for operating a power amplifier |
| 08/12/2009 | CN201290094Y Wcdma低噪声放大器装置 Low noise amplifier means Wcdma |
| 08/12/2009 | CN201290093Y Automatic gain compensation and linearity control device of power amplifier |
| 08/12/2009 | CN101507106A Amplifier circuit and display apparatus having the same |
| 08/12/2009 | CN101507105A Method and apparatus for controlling a selectable voltage audio power output stage |
| 08/12/2009 | CN101507104A Energy-efficient consumer device audio power output stage and method of using the same |
| 08/12/2009 | CN101505141A Reference buffer |
| 08/12/2009 | CN101505140A Trans-impedance amplifier with low noise and high gain-bandwidth product |
| 08/12/2009 | CN101505139A Digital linear pre-distortion method and system |
| 08/11/2009 | US7574326 Signal processor, method of signal processing and computer program |
| 08/11/2009 | US7573333 Amplifier and driving circuit using the same |
| 08/11/2009 | US7573329 System and method for IM3 reduction and cancellation in amplifiers |
| 08/11/2009 | US7573327 Autozeroing current feedback instrumentation amplifier |
| 08/06/2009 | WO2009097353A1 Method and apparatus for reducing intermodulation distortion in an electronic device having an amplifier circuit |
| 08/06/2009 | WO2009096132A1 Power amplification device and communication device |
| 08/06/2009 | WO2009096098A1 Semiconductor device |
| 08/06/2009 | WO2009096040A1 Distortion compensation device |
| 08/06/2009 | WO2009095855A1 Circuit with a power amplifier and amplification method |
| 08/06/2009 | WO2009079468A3 Amplifier with dynamic bias |
| 08/06/2009 | WO2009040697A3 Automatic common-mode rejection calibration |
| 08/06/2009 | US20090195671 Method for integrating image sensor |
| 08/06/2009 | US20090195315 Sample-and-hold amplifiers |
| 08/06/2009 | US20090195311 Independent dominant pole compensation of two loops using one compensation element |
| 08/06/2009 | US20090195309 Distortion compensator apparatus, amplifier apparatus, transmitter, and method of compensating distortion |
| 08/06/2009 | US20090195306 Switched-capacitor circuit having switch-less feedback path |
| 08/06/2009 | US20090195305 Analog Switch Controller |
| 08/05/2009 | EP2086109A1 Differential amplifier |
| 08/05/2009 | EP1652294B1 Cartesian loop transmitter and method of adjusting an output level of such transmitter |
| 08/05/2009 | EP1282224B1 Distortion compensation apparatus |
| 08/05/2009 | EP1230730B1 Amplifier with improved, high precision, high speed and low power consumption architecture |
| 08/05/2009 | CN201286083Y Audio power amplifying circuit and television set having the circuit |
| 08/05/2009 | CN101501986A Stacked buffers |
| 08/05/2009 | CN101501985A Electronic device for self oscillating class D system |
| 08/05/2009 | CN101499807A Self-calibration system and method for mobile phone power |
| 08/05/2009 | CN101499781A Distortion compensating apparatus and power amplifier apparatus |
| 08/05/2009 | CN101499780A Re-configurable low noise amplifier utilizing feedback capacitors |
| 08/05/2009 | CN101499779A Piezoelectric minimized wide-band power amplifier |
| 08/05/2009 | CN101499778A Amplifier circuit |
| 08/05/2009 | CN101499777A Highly efficient power amplifier and implementing method thereof |
| 08/05/2009 | CN101499776A Circuit and method for reducing switching noise of amplifier |
| 08/05/2009 | CN100525122C Harmonic intensified radio-frequency low noise amplifier |
| 08/05/2009 | CN100525084C Low distortion class-d amplifier |
| 08/05/2009 | CN100525083C Power supply rejection for pulse width modulated amplifiers and automatic gain control |
| 08/05/2009 | CN100525080C Amplifier system and method |
| 08/05/2009 | CN100525079C Method and equipment of simulating predistortion linearization |
| 08/05/2009 | CN100525078C Power circuit of field effect tube microwave amplifier |
| 08/05/2009 | CN100525077C Low noise amplifier using cascode structure to realize single end input to differential pair output |
| 08/05/2009 | CN100525076C Amplifier apparatus and method |
| 08/05/2009 | CN100525075C Audio signal processing apparatus and audio signal processing method |
| 08/05/2009 | CN100525074C Dynamically biased amplifier |
| 08/05/2009 | CN100523835C Current-voltage conversion circuit |
| 08/04/2009 | US7571415 Layout of power device |
| 08/04/2009 | US7570118 Thermal overload protection circuit and method for protecting switching power amplifier circuits |
| 07/30/2009 | WO2009093396A1 Non-linear distortion compensation circuit, transmission circuit, and non-linear distortion compensation method |
| 07/30/2009 | WO2009093094A1 A method for compensating signal distortion in an emitting payload |
| 07/30/2009 | WO2009092959A1 Radiofrequency emission system |
| 07/30/2009 | US20090189692 Predistorter |
| 07/30/2009 | US20090189691 Method and apparatus for reducing intermodulation distortion in an electronic device having an amplifier circuit |
| 07/30/2009 | US20090189689 Power supply processing for power amplifiers |
| 07/30/2009 | US20090189449 Power source and method for controlling operational power |
| 07/30/2009 | DE102009005493A1 Verstärkermodulationsverfahren und Vorrichtung Amplifier modulation method and device |
| 07/29/2009 | EP2083542A2 Power amplifying apparatus with bandwidth limitation processing on variable power supply |
| 07/29/2009 | EP2083516A1 Distortion compensating apparatus and power amplifier apparatus |
| 07/29/2009 | EP2082479A1 Circuit and method for biasing a gallium arsenide (gaas) power amplifier |
| 07/29/2009 | CN101494440A Device and method for improving feedback linearity of 1.5 bit Sigma-Delta modulation D type amplifier |
| 07/29/2009 | CN101494439A Amplifier |
| 07/29/2009 | CN100521517C Preamplifier gain switching circuit and method |
| 07/29/2009 | CN100521516C Amplifier circuit for capacitive transducers |
| 07/29/2009 | CN100521515C High-power MOSFET tube security protection method and circuit in radio frequency emitting circuit |
| 07/29/2009 | CN100521514C Amplifier with feedback bridge |
| 07/29/2009 | CN100521513C Multistage amplifying devices, and reception device and transmission device using the same and radio-communication device |
| 07/29/2009 | CN100521512C RF fundamental neutralizing circuit of adapting to power |
| 07/29/2009 | CN100521511C Amplifier circuit having an extended Wilson current-mirror self-bias boosting circuit |
| 07/29/2009 | CN100521510C Cascode cmos RF power amplifier with isolated trnasistors |
| 07/29/2009 | CN100521509C Gain changeable amplifier |
| 07/28/2009 | US7567130 Linearized trans-impedance amplifier |
| 07/28/2009 | US7567121 Current-mode instrumentation amplifier error reduction circuit and method |
| 07/23/2009 | WO2009090825A1 Predistorter |