| 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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| 01/07/2009 | CN101340176A Apparatus for increasing turn rate of operational amplifier |
| 01/07/2009 | CN100449939C Injection circuit with external predistortion |
| 01/07/2009 | CN100449938C Error loop self-adaptive cancellation control method for feedforward linear power amplifier |
| 01/06/2009 | US7474237 Circuits and methods for using error correction in power amplification and signal conversion |
| 01/06/2009 | US7474150 Amplifier composite triple beat (CTB) reduction by phase filtering |
| 01/01/2009 | US20090003628 Drivers and methods for driving a load |
| 01/01/2009 | US20090002074 Power Supply Control Circuit |
| 01/01/2009 | US20090002072 Power amplification device |
| 01/01/2009 | US20090002071 Distributed Circular Geometry Power Amplifier Architecture |
| 01/01/2009 | US20090002069 Variable circuit, communication apparatus, mobile communication apparatus and communication system |
| 01/01/2009 | US20090002068 Dynamic Biasing System For An Amplifier |
| 01/01/2009 | US20090002067 Method and System for Signal Coupling and Direct Current Blocking |
| 12/31/2008 | WO2009001254A2 Pulse width modulation circuit and class-d amplifier comprising the pwm circuit |
| 12/31/2008 | WO2009000884A1 Amplifying device, corresponding electronic circuit and acoustic enclosure |
| 12/31/2008 | WO2009000236A2 High-dynamic ammeter with small time constant |
| 12/31/2008 | WO2008030859A3 Reduction of voltage spikes in switching half-bridge stages |
| 12/31/2008 | EP1676362B1 Electronic circuit for amplification of a bipolar signal |
| 12/31/2008 | EP1060563A4 Method and apparatus for compensating for delays in modulator loops |
| 12/31/2008 | CN201174685Y Pilot signal adaptive detection apparatus for feed forward power amplifier with amplitude periodically jumping |
| 12/31/2008 | CN101335533A Radio communication apparatus |
| 12/31/2008 | CN101335517A Amplifier |
| 12/31/2008 | CN101335502A Standing wave ratio debugging method and system of low noise amplifier |
| 12/31/2008 | CN101335501A Current signal linear transmitting method |
| 12/31/2008 | CN101335500A Method and circuit for eliminating breaking sound of audio circuit |
| 12/31/2008 | CN101335140A Variable circuit, communication apparatus, mobile communication apparatus and communication system |
| 12/31/2008 | CN100448166C Amplifier circuit |
| 12/31/2008 | CN100448165C Predistorter |
| 12/30/2008 | US7471739 Advanced adaptive pre-distortion in a radio frequency transmitter |
| 12/30/2008 | US7471226 Radio frequency digital-to-analog converter |
| 12/30/2008 | US7471153 Multi-primary distributed active transformer amplifier power supply and control |
| 12/30/2008 | US7471149 Multi-amplifier circuit |
| 12/30/2008 | US7471140 Circuit device for filtering or impedance matching |
| 12/30/2008 | US7469491 Transmitter predistortion circuit and method therefor |
| 12/25/2008 | US20080315956 Saturation Handling |
| 12/25/2008 | US20080315955 Class l amplifier |
| 12/25/2008 | US20080315947 Controller-Assisted Method and Controller-Assisted Device for Determining a Characteristic of a Compensation Member in a Level Control Circuit |
| 12/24/2008 | WO2008156395A1 Improved feed forward noise reduction in a transmitter |
| 12/24/2008 | WO2008155312A1 Electrostatic device for damping a mechanical vibration movement of a resonant moving object |
| 12/24/2008 | EP2007008A2 Circuit and method for reducing noise |
| 12/24/2008 | EP2005581A1 Active splitter device and method using diplexed front end |
| 12/24/2008 | EP2005580A1 A method for compensating signal distortions in composite amplifiers |
| 12/24/2008 | EP2005579A1 A method and apparatus for reducing frequency memory effects in rf power amplifiers |
| 12/24/2008 | EP2005578A2 High efficiency load insensitive power amplifier |
| 12/24/2008 | EP2005577A2 Dynamic bias control in power amplifier |
| 12/24/2008 | EP2005576A1 Amplifier and method of amplifying an input signal |
| 12/24/2008 | EP1673857A4 Data signal amplifier and processor with multiple signal gains for increased dynamic signal range |
| 12/24/2008 | EP1382083B1 Tunable multiplexer |
| 12/24/2008 | DE102007026930A1 Power amplifier system has power amplifier and power amplifier input is connected with upper power supply level, which are different and control device is designed such that device operates power amplifier |
| 12/24/2008 | DE102007026912A1 Vorrichtung und Verfahren zur Stromversorgung einer induktiven Last Apparatus and method for supplying power to an inductive load |
| 12/24/2008 | DE102004011719B4 Halbleitervorrichtung Semiconductor device |
| 12/24/2008 | CN201171195Y A-genus audio power amplifier |
| 12/24/2008 | CN201171194Y Audio power-amplifying apparatus |
| 12/24/2008 | CN101331680A Enhanced low noise amplifier |
| 12/24/2008 | CN101330481A Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal |
| 12/24/2008 | CN101330276A Digital predistortion power amplifier and implementing method thereof |
| 12/24/2008 | CN100446413C Multi-band predistorter using power series representation |
| 12/24/2008 | CN100446412C Multi-band look-up table type predistorter |
| 12/23/2008 | US7468632 Power supply rejection for pulse width modulated amplifiers and automatic gain control |
| 12/23/2008 | US7468631 Class D amplifier |
| 12/18/2008 | WO2008152579A1 System to increase the efficiency of an amplifier and the amplifier so obtained |
| 12/18/2008 | WO2008134404A3 Systems and methods for measuring non-linear characteristics of a power amplifier |
| 12/18/2008 | WO2008110444A3 Amplifier arrangement and method for amplifying a signal |
| 12/18/2008 | WO2008062371A3 Integrated doherty type amplifier arrangement with high power efficiency |
| 12/18/2008 | WO2008008528A3 Unilateralized amplifier |
| 12/18/2008 | US20080309405 Power Amplifier Pre-Distortion |
| 12/18/2008 | US20080309404 Single-Ended Amplifier |
| 12/18/2008 | DE202007010962U1 Messvorrichtung mit Spinning-Current-Hallsensor Measuring device with spinning current Hall sensor |
| 12/17/2008 | EP2002558A2 High efficiency converter providing switching amplifier bias |
| 12/17/2008 | EP1673856A4 Method for aligning feed forward loops |
| 12/17/2008 | CN201167318Y Power amplifier switch control circuit for TDD system |
| 12/17/2008 | CN201167301Y Power amplifier capable of adjusting efficiency adaptively |
| 12/17/2008 | CN201167300Y Integrated digital predistortion power amplifier |
| 12/17/2008 | CN201167299Y Temperature negative feedback audio power output circuit |
| 12/17/2008 | CN201167298Y Ultra low noise preamplifier |
| 12/17/2008 | CN101326692A 光发送电路 Optical transmission circuit |
| 12/17/2008 | CN101326642A Gallium nitride material transistors and methods for wideband applications |
| 12/17/2008 | CN101325420A Method for reducing stray signal |
| 12/17/2008 | CN101325404A Frequency-hopping carrier generator |
| 12/17/2008 | CN101325403A Radio frequency signal amplifying device |
| 12/17/2008 | CN101325401A Circuit for restraining start-up and closedown noise of whole difference audio power amplifier |
| 12/17/2008 | CN100444518C Signal transmission apparatus and method |
| 12/17/2008 | CN100444517C DC excursion correcting device |
| 12/16/2008 | US7466966 Method for clipping a wideband radio signal and corresponding transmitter |
| 12/16/2008 | US7466204 Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same |
| 12/16/2008 | US7466197 Selecting samples for amplifier digital predistortion estimation |
| 12/16/2008 | US7466194 DC offset mitigation in a single-supply amplifier |
| 12/16/2008 | US7466193 Device and method of eliminating DC offset |
| 12/11/2008 | WO2008150734A2 Method and apparatus for providing a cartesian training waveform |
| 12/11/2008 | WO2008149517A1 Bias circuit and semiconductor integrated circuit using the same |
| 12/11/2008 | WO2008030303A3 Amplifier feedback and bias configuration |
| 12/11/2008 | US20080303598 Circuit and method for reducing bias noise in amplifier circuits |
| 12/11/2008 | US20080303591 Amplifying circuit and associated linearity improving method |
| 12/10/2008 | EP2001127A1 System and method for linearizing microwave transmitters |
| 12/10/2008 | EP1999758A2 Offset cancellation for sampled-data circuits |
| 12/10/2008 | EP1751850B1 Plop noise avoidance for an amplifier |
| 12/10/2008 | CN101320980A Transmitter and signal transmission method |
| 12/10/2008 | CN101320963A Power amplifier |
| 12/10/2008 | CN101320961A Power amplification circuit |
| 12/10/2008 | CN101320960A Power amplifier predistortion method of Hammerstein model based on fuzzy neural network |
| 12/10/2008 | CN101320959A Power control and modulation of switched-mode power amplifiers with one or more stages |