| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
|---|
| 02/12/2013 | US8373505 Dynamic current boost in class AB amplifier for low distortion |
| 02/12/2013 | US8373504 Class D power amplifier |
| 02/07/2013 | WO2013019819A2 Zero-voltage-switching contour based outphasing power amplifier |
| 02/07/2013 | WO2013018973A1 Switching amplifier and audio device |
| 02/07/2013 | WO2013018950A1 Modulation device for class d switching amplifier |
| 02/07/2013 | WO2013017965A1 Wireless long term evolution radio architecture system and method |
| 02/07/2013 | WO2013017407A1 A high efficiency power amplifier |
| 02/07/2013 | US20130035679 Electrosurgical Apparatus with Real-Time RF Tissue Energy Control |
| 02/07/2013 | US20130033328 Efficient power amplifier |
| 02/07/2013 | US20130033325 Rf power transistor circuit |
| 02/07/2013 | US20130033324 Amplifier and associated receiver |
| 02/07/2013 | US20130033323 Electronic system comprising a sensor structure and an analog interface connected thereto with sensor independent operating range |
| 02/07/2013 | US20130033322 Circuit unit, bias circuit with circuit unit and differential amplifier circuit with first and second circuit unit |
| 02/07/2013 | US20130033321 High efficiency power amplifier |
| 02/07/2013 | US20130033320 Circuit and method for dynamically controlling op-amp offset for photodetector applications |
| 02/07/2013 | US20130033319 Amplifier circuits and modulation signal generating circuits therein |
| 02/07/2013 | US20130033318 Switching amplifier and audio device |
| 02/07/2013 | US20130033313 RF Power Transmission, Modulation, and Amplification Embodiments |
| 02/07/2013 | US20130033312 Single-ended to differential amplifier |
| 02/07/2013 | DE102012211690A1 Leistungsverstärker Power amplifier |
| 02/06/2013 | EP2555423A1 Digital amplifier |
| 02/06/2013 | EP2553808A1 Variable class characteristic amplifier |
| 02/06/2013 | CN102918766A Transimpedance amplifier, integrated circuit, and system |
| 02/06/2013 | CN102916667A Broadband programmable gain amplifier with step length of 2dB |
| 02/06/2013 | CN102916666A Broadband programmable gain amplifier |
| 02/06/2013 | CN102916664A Operational amplifier sharing though exchanging transconductance unit |
| 02/06/2013 | CN102916663A Class B push-pull amplifier circuit |
| 02/06/2013 | CN102916662A 功率放大器 PA |
| 02/06/2013 | CN102916661A Prime amplifier used for broadcasting system of railway station |
| 02/06/2013 | CN102916660A 高频电路及高频模块 High-frequency circuits and high-frequency module |
| 02/06/2013 | CN102916659A Automatic inductance-capacitance calibrating method and circuit |
| 02/06/2013 | CN102916658A Amplifier and associated receiver |
| 02/06/2013 | CN102916657A High-frequency bandwidth amplifying circuit |
| 02/06/2013 | CN102916656A Amplifier circuits and modulation signal generating circuits therein |
| 02/06/2013 | CN102910192A Security input isolating circuit and track circuit receiver provided with same |
| 02/06/2013 | CN102045033B Amplifier with single-ended input and differential output |
| 02/06/2013 | CN101834573B Class-D amplifier |
| 02/06/2013 | CN101795115B Multiband matching circuit and multiband power amplifier |
| 02/05/2013 | US8369906 Antenna compensation system and method in a communications device |
| 02/05/2013 | US8369818 Low noise amplifier protection using a clamping device |
| 02/05/2013 | US8368789 Systems and methods to provide reference current with negative temperature coefficient |
| 02/05/2013 | US8368673 Output buffer and source driver using the same |
| 02/05/2013 | US8368470 RF power amplifiers with linearization |
| 02/05/2013 | US8368469 Silicon-on-insulator high power amplifiers |
| 02/05/2013 | US8368468 Error amplifier and LED circuit comprising the same |
| 02/05/2013 | US8368467 Cascode amplifier with increased linearity |
| 02/05/2013 | US8368464 Balanced output signal generator |
| 02/05/2013 | US8368462 Method, system, and apparatus for RF switching amplifier |
| 02/05/2013 | CA2729742C Switched resonant ultrasonic power amplifier system |
| 01/31/2013 | WO2013016575A2 Low variation current multiplier |
| 01/31/2013 | WO2013015820A1 Inductive-element feedback-loop compensator |
| 01/31/2013 | WO2013015778A1 Actively tuned circuit having parallel carrier and peaking paths |
| 01/31/2013 | WO2013014521A1 Electric power supply apparatus, contactless electricity transmission apparatus, vehicle, and contactless electric power transfer system |
| 01/31/2013 | WO2013014009A1 Microphone preamplifier circuit |
| 01/31/2013 | WO2012151491A3 Zero-power sampling sar adc circuit and method |
| 01/31/2013 | WO2012143511A3 Linear amplifier arrangement for high-frequency signals |
| 01/31/2013 | US20130029620 Low variation current multiplier |
| 01/31/2013 | US20130029619 Signal path termination |
| 01/31/2013 | US20130027272 Doherty amplifier arrangement |
| 01/31/2013 | US20130027138 Amplifier circuit and method for signal sensing |
| 01/31/2013 | US20130027137 Radiation hardened differential amplifier |
| 01/31/2013 | US20130027135 Systems and methods for adaptive bias circuits for a power amplifier |
| 01/31/2013 | US20130027134 Switching regulator with variable compensation |
| 01/31/2013 | US20130027133 Sense amplifiers including bias circuits |
| 01/31/2013 | US20130027132 High efficiency multiple power mode linear radio frequency power amplifier |
| 01/31/2013 | US20130027128 Systems and Methods of RF Power Transmission, Modulation, and Amplification |
| 01/31/2013 | US20130027007 Amplifier with multiple zero-pole pairs |
| 01/31/2013 | DE102008034324B4 Verstärkerschaltung Amplifier circuit |
| 01/31/2013 | DE102008006077B4 Verstärkeranordnung und Verfahren Amplifier arrangement and method |
| 01/31/2013 | DE102004031687B4 Leistungsverstärkeranordnung Power amplifier arrangement |
| 01/31/2013 | DE102004018355B4 Schaltung zur Signalverarbeitung, ihre Verwendung und Verfahren zur Temperaturkompensation des Großsignalübertragungsverhaltens von Transistoren Circuit for signal processing, use and method for temperature compensation of the large-signal transmission behavior of transistors |
| 01/31/2013 | DE102004001094B4 Leistungsverstärkeranordnung Power amplifier arrangement |
| 01/30/2013 | EP2552019A1 Sound output device using vacuum tube, audio apparatus and method for sound output thereof |
| 01/30/2013 | EP2552018A1 Microphone preamplifier circuit |
| 01/30/2013 | EP2552017A1 A method of diminishing the minimum range of operation of a communication link |
| 01/30/2013 | EP2550746A1 Circuit and method for interference reduction |
| 01/30/2013 | EP2550736A2 Discrete time operational transconductance amplifier for switched capacitor circuits |
| 01/30/2013 | EP2550735A1 Methods for determining optimum power supply voltages for radio-frequency power amplifier circuitry |
| 01/30/2013 | CN202713240U Multichannel operational amplifier integrated circuit with basis references |
| 01/30/2013 | CN202713239U Capacitance amplifying circuit |
| 01/30/2013 | CN202713238U Audio frequency power amplifier circuit for portable alarm apparatus |
| 01/30/2013 | CN202713237U Power amplification module |
| 01/30/2013 | CN202713236U Power amplifier for flood discharge early-warning system |
| 01/30/2013 | CN202713235U Audio power amplifier supplying power to microphone |
| 01/30/2013 | CN202713234U Broadband adapting radio-frequency power amplification device |
| 01/30/2013 | CN202713233U Automobile player digital audio power amplifier power supply circuit and automobile player |
| 01/30/2013 | CN102906999A Class A push-pull amplifier |
| 01/30/2013 | CN102906998A Amplification circuit, communication device, and transmission device using amplification circuit |
| 01/30/2013 | CN102906997A Methods for determining optimum power supply voltages for radio-frequency power amplifier circuitry |
| 01/30/2013 | CN102904552A Differential to single-ended convertor |
| 01/30/2013 | CN102904537A Weak wireless signal amplifier of time division duplex system and control method |
| 01/30/2013 | CN102904535A Power amplifier |
| 01/30/2013 | CN102904534A Power amplifier and method for controlling same |
| 01/30/2013 | CN102904533A Received signal strength indicating circuit for high-speed limiting amplifier |
| 01/30/2013 | CN102142820B Double-channel operational amplifier circuit |
| 01/30/2013 | CN101986557B Method and structure for eliminating offset voltage of operational amplifier by using lining bias effect |
| 01/30/2013 | CN101771385B Power amplification circuit and thermally induced sound-producing device with power amplification circuit |
| 01/30/2013 | CN101471633B Output stage bias circuit and operational amplifier applying the same |
| 01/30/2013 | CN101420206B Operation amplifier and switch control method thereof |
| 01/29/2013 | US8363045 Class AB amplifier circuit and display apparatus |