| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 05/19/2009 | US7535302 Operational amplifier and display device |
| 05/19/2009 | US7535301 Multi-amplifier circuit |
| 05/19/2009 | US7535300 Operational amplifier |
| 05/19/2009 | US7535299 High-frequency amplification circuit |
| 05/19/2009 | US7535296 Class-E radio frequency power amplifier with feedback control |
| 05/19/2009 | US7535289 Integrated RC filter |
| 05/19/2009 | US7535267 Output circuit and operational amplifier |
| 05/19/2009 | US7534981 Optical semiconductor device having a shield wire and optical pickup device having a shield wire |
| 05/19/2009 | CA2519641C A facilitating fault tolerance in a rf amplifier system |
| 05/14/2009 | WO2009061817A2 Apparatus and method for low power rail-to- rail operational amplifier |
| 05/14/2009 | WO2009060652A1 Power amplifier and radio wave transmitter having the same |
| 05/14/2009 | WO2009060557A1 Signal amplifying device and acoustic system |
| 05/14/2009 | WO2009060264A1 Integrated circuit having harmonic termination circuitry |
| 05/14/2009 | US20090124219 High linearity, high efficiency power amplifier with DSP assisted linearity optimization |
| 05/14/2009 | US20090121791 Wideband low noise amplifiers |
| 05/14/2009 | US20090121789 Device comprising a feedback-less gain controlled amplifier |
| 05/14/2009 | US20090121119 Semiconductor device |
| 05/13/2009 | EP2058947A2 Broadband reciprocal active balun structure |
| 05/13/2009 | EP2058944A1 Transconductance amplifier |
| 05/13/2009 | EP2058943A1 Harmonic processing circuit and amplifying circuit using the same |
| 05/13/2009 | EP2058942A1 Digital amplifier |
| 05/13/2009 | EP2057735A1 Differential to single-ended conversion circuit and comparator using the circuit |
| 05/13/2009 | EP1982411A4 Notch filter for ripple reduction in chopper stabilized amplifiers |
| 05/13/2009 | EP1714383A4 Methods and systems for signal amplification through envelope removal and restoration |
| 05/13/2009 | EP1514110A4 An apparatus and method for two-dimensional electron gas actuation and transduction for gaas nems |
| 05/13/2009 | EP1410495B1 System for controlling a class d amplifier |
| 05/13/2009 | CN101432964A Operational amplifier |
| 05/13/2009 | CN101431316A Double-frequency band inductor multiplexing radio frequency CMOS low-noise amplifier |
| 05/13/2009 | CN101431315A Graded amplifying circuit and multifunctional data acquisition card |
| 05/13/2009 | CN101431314A Power amplification circuit of quasi-resonance electromagnet water heater |
| 05/13/2009 | CN101431313A Amplifying circuit and method for improving linearity by using grid non-linear capacitor |
| 05/13/2009 | CN100488038C RF power amplifier |
| 05/13/2009 | CN100488037C Device for correcting input offset voltage |
| 05/13/2009 | CN100488036C D type amplifier and modulating method thereof |
| 05/13/2009 | CN100488035C Transistor series connection single end direct coupled class-A power amplification circuit |
| 05/13/2009 | CN100488034C CMOS self-adaptive biasing circuit |
| 05/13/2009 | CN100488032C Method for restraining noises of digital audio frequency power amplifier |
| 05/13/2009 | CN100488031C Method for improving efficiency of power amplifier |
| 05/13/2009 | CN100486517C DC digital amplifier for recording human body and non-human body microsignal |
| 05/12/2009 | US7532543 Acoustic signal generating apparatus |
| 05/12/2009 | US7532427 TMR/GMR amplifier with input current compensation |
| 05/12/2009 | US7532078 Scannable virtual rail method and ring oscillator circuit for measuring variations in device characteristics |
| 05/12/2009 | US7532076 Operational amplifier |
| 05/12/2009 | US7532075 Bias circuit |
| 05/12/2009 | US7532074 Device and method for biasing a transistor amplifier |
| 05/12/2009 | US7532073 Solid state power amplifier with multi-planar MMIC modules |
| 05/12/2009 | US7532072 Method to control the output common mode in a differential OPAMP with rail-to-rail input stage |
| 05/12/2009 | US7532071 Operational amplifier circuit |
| 05/12/2009 | US7532070 Analog variable gain amplifier with improved dynamic range characteristics |
| 05/12/2009 | US7532069 Differential amplifying circuit |
| 05/12/2009 | US7532068 Differential amplifier circuit |
| 05/12/2009 | US7531783 Variable gain constant bandwidth trans-impedance amplifier for fiber optic rate sensor |
| 05/12/2009 | CA2488472C Digital memory-based predistortion technique |
| 05/07/2009 | WO2009059185A2 Differential amplifier system |
| 05/07/2009 | WO2009059074A1 Low noise, low power and high bandwidth capacitive feedback trans-impedance amplifier with differential fet input and bipolar emitter follower feedback |
| 05/07/2009 | WO2009057385A1 Power amplifier and power amplifier control method |
| 05/07/2009 | WO2009056360A1 Matched integrated electronic components |
| 05/07/2009 | WO2009032573A3 Common-mode bandwidth reduction circuit and method for differential applications |
| 05/07/2009 | US20090117868 Fast Settling Radio Receiver Automatic Gain Control System |
| 05/07/2009 | US20090116663 Combining an audio power amplifier and a power converter in a single device |
| 05/07/2009 | US20090115537 Systems and Methods for Voltage Controlled Oscillator Calibration |
| 05/07/2009 | US20090115532 Image signal amplifying circuit and amplifying semiconductor integrated circuit |
| 05/07/2009 | US20090115531 Efficient power amplifier |
| 05/07/2009 | US20090115530 Doherty-Amplifier System |
| 05/07/2009 | US20090115529 Power amplifier having input ends combined in series and output ends combined in series |
| 05/07/2009 | US20090115527 Output stage circuit and operational amplifier thereof |
| 05/07/2009 | US20090115526 Fet bias circuit |
| 05/07/2009 | US20090115525 Frequency tunable low noise amplifier |
| 05/07/2009 | US20090115524 Output stage circuit and operational amplifier thereof |
| 05/07/2009 | US20090115523 Discrete time amplifier circuit and analog-digital converter |
| 05/07/2009 | US20090115522 Low power, low noise amplifier system |
| 05/07/2009 | US20090115521 High CMR amplifier topology |
| 05/07/2009 | US20090115519 Power amplifier and its idling current setting circuit |
| 05/07/2009 | US20090115518 Differential amplifier with input stage inverting common-mode signals |
| 05/07/2009 | US20090115517 Apparatus and method for low power rail-to-rail operational amplifier |
| 05/07/2009 | US20090115516 Nauta operational transconductance amplifier |
| 05/07/2009 | US20090115515 Receiver Comprising an Amplifier |
| 05/07/2009 | US20090115514 Class D amplifier |
| 05/07/2009 | US20090115512 Distributed doherty amplifiers |
| 05/07/2009 | US20090115510 Device for amplifying a voltage representing an audiophonic information |
| 05/07/2009 | US20090115509 Systems and Methods for Isolating an Analog Signal |
| 05/07/2009 | US20090115508 Switching amplifier and its modulation process |
| 05/07/2009 | US20090115507 Method of and apparatus for reducing settling time of a switched capacitor amplifier |
| 05/07/2009 | US20090115461 Current converting method, transconductance amplifier and filter circuit using the same |
| 05/07/2009 | DE102007053222A1 Vorrichtung und Verfahren zur Signalverarbeitung von Spannungssignalen von Elektroden eines magnetisch induktiven Durchflussmessgeräts Apparatus and method for signal processing of voltage signals from electrodes of a magnetic inductive flow meter |
| 05/07/2009 | DE102007051853A1 Electronic circuit for transimpedance amplifier for conversion of current in adequate output voltage, comprises semiconductor component, which operates as diode attached at high impedance potential vertex in electronic circuit |
| 05/07/2009 | DE102005010643B4 Stromsparende differenzielle Breitbandtreiberschaltung Electric saving differential wideband driver circuit |
| 05/06/2009 | EP2056455A2 Solid state microwave power amplifier |
| 05/06/2009 | EP2056454A2 Solid state microwave power amplifier |
| 05/06/2009 | EP2056453A2 Amplifier |
| 05/06/2009 | EP2056452A2 Signal generating apparatus and class-D- amplifying apparatus |
| 05/06/2009 | EP2056451A2 Efficient power amplifier |
| 05/06/2009 | EP2056450A1 Amplifier circuit and display apparatus having the same |
| 05/06/2009 | EP2056449A2 Amplifier |
| 05/06/2009 | EP2056448A2 Low noise amplifier and differential amplifier |
| 05/06/2009 | EP2055002A1 Electronic device for self oscillating class d system |
| 05/06/2009 | EP2055001A2 Filter-tracking and control method |
| 05/06/2009 | EP2055000A2 Buffer device for switched capacity circuit |
| 05/06/2009 | EP1374396B1 Variable gain low-noise amplifier for a wireless terminal |
| 05/06/2009 | CN201234241Y Large power solid power amplifier apparatus |