| 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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| 03/18/2008 | US7345539 Broadband microwave amplifier |
| 03/18/2008 | US7345538 Measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit |
| 03/18/2008 | US7345537 Linear power amplifier with multiple output power levels |
| 03/18/2008 | US7345535 Power amplification apparatus of portable terminal |
| 03/18/2008 | US7345534 Efficient power amplification system |
| 03/18/2008 | US7345532 PWM digital amplifier with high-order loop filter |
| 03/18/2008 | US7345530 Regulated switch driving scheme in switched-capacitor amplifiers with opamp-sharing |
| 03/18/2008 | US7345529 Chopper stabilized amplifier without DC output ripple |
| 03/13/2008 | WO2008030303A2 Amplifier feedback and bias configuration |
| 03/13/2008 | US20080063112 Method for avoiding interference radiation of am transmitters used in digital transmission |
| 03/13/2008 | US20080062004 Apparatus and method for determining a state parameter of an object to be monitored |
| 03/13/2008 | US20080061885 Tunable Low Noise Amplifier |
| 03/13/2008 | US20080061884 Amplifier feedback and bias configuration |
| 03/13/2008 | US20080061876 Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers |
| 03/13/2008 | US20080061873 Gain Adjustment for Programmable Gain Amplifiers |
| 03/13/2008 | US20080061872 Gain Adjustment for Programmable Gain Amplifiers |
| 03/13/2008 | US20080061871 Power amplifier |
| 03/13/2008 | US20080061820 MOS linear region impedance curvature correction |
| 03/12/2008 | EP1898523A1 Switchable power divider circuit and power amplifier module |
| 03/12/2008 | EP1898522A2 Power amplifier system and mobile phone terminal using the same |
| 03/12/2008 | EP1898521A1 Power amplifying apparatus and mobile communication terminal |
| 03/12/2008 | EP1420513B1 Apparatus and method for improving efficiency of power amplifier operating under large peak-to average power ratio |
| 03/12/2008 | CN101141134A Software compensation method of radio frequency module performance and improved radio frequency module |
| 03/12/2008 | CN101141115A High-power MOSFET tube security protection method and circuit in radio frequency emitting circuit |
| 03/12/2008 | CN101141114A CMOS self-adaptive biasing circuit |
| 03/12/2008 | CN101141113A Output circuit of vacuum tube amplifier |
| 03/12/2008 | CN100375279C Decouping network in integrated circuit |
| 03/11/2008 | US7343138 Compensating for load pull in electromagentic signal propagation using adaptive impedance matching |
| 03/11/2008 | US7342976 Predistortion circuit and method for compensating A/D and other distortion in a digital RF communications transmitter |
| 03/11/2008 | US7342955 Apparatus and method for mobile communication device transmission |
| 03/11/2008 | US7342453 Cascode circuit |
| 03/11/2008 | US7342446 Apparatus and method for controlling feed-forward amplifiers |
| 03/11/2008 | US7342443 Operational amplifier |
| 03/11/2008 | US7342442 Variable gain amplifying apparatus and wireless communication apparatus |
| 03/06/2008 | WO2008026995A2 Method for spectrum- preserving par reduction |
| 03/06/2008 | WO2008026979A1 A low noise amplifier for an electrically small antenna |
| 03/06/2008 | US20080059968 Mechanism for on-line prediction of future performance measurements in a computer system |
| 03/06/2008 | US20080055006 Amplifier for improving electrostatic discharge characteristic |
| 03/06/2008 | US20080055001 Power amplifying apparatus and mobile communication terminal |
| 03/06/2008 | US20080055000 Amplification Apparatus |
| 03/06/2008 | US20080054999 Input offset voltage corrector |
| 03/05/2008 | EP1895654A1 High frequency power amplifier distortion compensation device |
| 03/05/2008 | EP1726090B1 A doherty amplifier |
| 03/05/2008 | EP1212878B1 Method and apparatus for rotating a phase of a modulated signal |
| 03/05/2008 | CN101136618A Tunable ferro-electric filter |
| 03/05/2008 | CN101136615A Class BB push-pull power amplifier |
| 03/05/2008 | CN101136614A Constant current circuit |
| 03/05/2008 | CN101136613A Single slice high-gain low-noise amplifier |
| 03/05/2008 | CN101136612A Amplifier device and method |
| 03/05/2008 | CN101136611A Amplifier device and method |
| 03/05/2008 | CN101136610A Amplifier device and method |
| 03/05/2008 | CN101136609A Amplifier apparatus and method |
| 03/05/2008 | CN101136590A DC-DC converter circuits and method and device containing said circuits |
| 03/05/2008 | CN100373783C Distortion compensation circuit, power amplifier using distortion compensation circuit, and distortion compensation signal generating method |
| 03/05/2008 | CN100373782C Method and apparatus using base band transformation to improve transmitter performance |
| 03/04/2008 | US7340699 Analysis apparatus for semiconductor LSI circuit electrostatic discharge by calculating inter-pad voltage between pads |
| 03/04/2008 | US7340381 Characterization of radio frequency (RF) signals using wavelet-based parameter extraction |
| 03/04/2008 | US7340226 Cartesian loop transmitter and method of adjusting an output level of such transmitter |
| 03/04/2008 | US7340005 Signal transmission apparatus and method |
| 03/04/2008 | US7339997 Line driver and method of operating the same |
| 03/04/2008 | US7339437 Ultra-wideband constant gain CMOS amplifier |
| 03/04/2008 | US7339436 Ultra broad-band low noise amplifier utilizing dual feedback technique |
| 03/04/2008 | US7339426 High efficiency linear amplifier employing dynamically controlled back off |
| 03/04/2008 | US7339423 Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers |
| 03/04/2008 | US7339422 Amplifier circuit and display device |
| 02/28/2008 | WO2008023473A1 Amplifier circuit and display apparatus having the same |
| 02/28/2008 | WO2008023414A1 Polar modulation transmission apparatus and polar modulation transmission method |
| 02/28/2008 | WO2008008751A3 Power amplifier with output voltage compensation |
| 02/28/2008 | US20080048785 Low-noise amplifier |
| 02/28/2008 | US20080048784 Medium Voltage or High Voltage Audio Power Amplifier and Protection Circuit |
| 02/28/2008 | US20080048783 Bias Circuit |
| 02/28/2008 | US20080048782 Circuit and method of establishing dc bias levels in an rf power amplifier |
| 02/28/2008 | US20080048776 Methods and Systems for Stabilizing an Amplifier |
| 02/28/2008 | US20080048774 High Efficiency Load Insensitive Power Amplifier |
| 02/28/2008 | US20080048773 Method and apparatus for dc offset cancellation in amplifiers |
| 02/28/2008 | US20080048732 Abnormality detection circuit |
| 02/27/2008 | EP1892828A1 Device for preventing a pop noise in an audio output apparatus and method therefor |
| 02/27/2008 | EP1892827A1 Single-band multi-standard power amplifier |
| 02/27/2008 | EP1891732A1 A power amplifier of a transmitter |
| 02/27/2008 | EP1751855B1 Pulse width modulator system |
| 02/27/2008 | EP1262018B1 High-efficiency power modulators |
| 02/27/2008 | CN101133550A Arbitrary waveform predistortion table generation |
| 02/27/2008 | CN101131334A High-frequency wideband amplification circuit used for piezoresistive dynamic pressure sensor |
| 02/26/2008 | US7336724 Method for scaling peak power amplitudes in a signal and corresponding transmitter |
| 02/26/2008 | US7336132 High-frequency power amplifier circuit and electronic part for communication |
| 02/26/2008 | US7336128 Feed forward amplifier for multiple frequency bands |
| 02/26/2008 | US7336126 Subtractor circuit and power detector arrangement having that subtractor circuit |
| 02/26/2008 | US7336125 Power amplifier and transmitter |
| 02/26/2008 | US7336124 Operational amplifier, line driver, and liquid crystal display device |
| 02/26/2008 | US7336123 Chopper amplifier circuit apparatus operable at low voltage utilizing switched operational amplifier |
| 02/21/2008 | WO2008020386A1 Power amplifier |
| 02/21/2008 | WO2008020384A1 Electronic device for self oscillating class d system |
| 02/21/2008 | US20080042776 Electric component for communication device and semiconductor device for switching transmission and reception |
| 02/21/2008 | DE10115099B4 Verfahren zur Amplitudenbegrenzung und Schaltungsanordnung A method for amplitude limiting and circuitry |
| 02/20/2008 | EP1890388A2 Peak suppressor |
| 02/20/2008 | EP1889373A1 By-pass arrangement of a low noise amplifier |
| 02/20/2008 | CN101129040A Pre-distortion of IQ modulator |
| 02/20/2008 | CN101129039A Pre-distortion of IQ modulator |
| 02/20/2008 | CN101128976A Non-linear processing of signal |
| 02/20/2008 | CN101127534A Simulated pre-distortion circuit and method |