| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 02/26/2009 | US20090051441 Low-noise amplifier |
| 02/26/2009 | US20090051440 Active balun circuit |
| 02/26/2009 | US20090051439 Transconductance signal capacity format |
| 02/26/2009 | US20090051436 Method and system for fet-based amplifier circuits |
| 02/26/2009 | US20090051435 Rf amplifier with stacked transistors, transmitting device, and method therefor |
| 02/26/2009 | US20090051434 Signal transfer circuit and circuit device using same |
| 02/26/2009 | US20090051433 Differential sensing with high common mode rejection |
| 02/26/2009 | US20090051432 High-bandwidth high-gain amplifier |
| 02/26/2009 | US20090051431 High-swing operational amplifier output stage using adaptive biasing |
| 02/26/2009 | US20090051430 Variable gain circuit |
| 02/26/2009 | US20090051429 High resolution variable gain control |
| 02/26/2009 | US20090051428 Agc circuit |
| 02/26/2009 | US20090051427 Output limiting circuit, class d power amplifier and audio equipment |
| 02/26/2009 | US20090051424 Active circuits with load linearization |
| 02/26/2009 | US20090051423 Digital audio amplifiers, electronic systems, and methods |
| 02/26/2009 | DE102007040063A1 Active bridge circuit for exciting bipolar current to produce periodic, modulated magnetic field that is utilized for treatment in traumatology field, has control units and resistors that are connected to ground terminal contact of bridge |
| 02/25/2009 | EP2028875A1 Digital audio signal amplifier |
| 02/25/2009 | EP2028761A1 Differential sensing with high common mode rejection |
| 02/25/2009 | EP2028760A1 A low side driver |
| 02/25/2009 | EP2027651A1 Improved control of switcher regulated power amplifier modules |
| 02/25/2009 | EP2027650A1 Input drive control for switcher regulated power amplifier modules |
| 02/25/2009 | EP1985013A4 Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal |
| 02/25/2009 | EP1897216A4 Automatic bias control circuit for linear power amplifiers |
| 02/25/2009 | EP1854209A4 Method and apparatus for an improved power amplifier |
| 02/25/2009 | CN201199715Y Set-top box capable of wireless receiving digital wired network signal |
| 02/25/2009 | CN101375504A Low noise amplifier |
| 02/25/2009 | CN101375494A Systems and methods for over-current protection |
| 02/25/2009 | CN101374569A Unipolar electric pulse generator |
| 02/25/2009 | CN101373960A Output limiting circuit, class d power amplifier and audio equipment |
| 02/25/2009 | CN101373956A Method for compensating common mode feedback circuit frequency of two-stage amplifier |
| 02/25/2009 | CN101373955A Differential amplifier circuit and A/D converter |
| 02/25/2009 | CN101373954A Method for amplifying voltage signal and operational amplifier |
| 02/25/2009 | CN101373953A Power amplifier |
| 02/25/2009 | CN101373952A Low noise amplifier capable of implementing differential amplification and method thereof |
| 02/25/2009 | CN101373631A Signal receiver |
| 02/25/2009 | CN100464497C Electronic amplifier circuit |
| 02/25/2009 | CN100464496C Integrated circuit and optical pickup device for multistage cascade amplifier |
| 02/25/2009 | CN100464275C Method for adjusting BGR circuit and BGR circuit |
| 02/24/2009 | US7496375 Transmission power control device |
| 02/24/2009 | US7496338 Multi-segment gain control system |
| 02/24/2009 | US7496334 Transmitter apparatus and wireless communication apparatus |
| 02/24/2009 | US7496151 Transmitting circuit, communication equipment, audio equipment, video equipment, and transmitting method |
| 02/24/2009 | US7495515 Low-noise amplifier |
| 02/24/2009 | US7495512 Differential amplifier, data driver and display device |
| 02/24/2009 | US7495511 Input system for a variable gain amplifier having class-AB transconductance stages |
| 02/24/2009 | US7495510 Current source circuit and differential amplifier |
| 02/24/2009 | US7495509 Audio power amplifier |
| 02/24/2009 | US7495504 Reference voltage generation circuit |
| 02/24/2009 | US7495478 Comparator and infrared remote control receiver |
| 02/24/2009 | US7495203 In-situ power monitor providing an extended range for monitoring input optical power incident on avalanche photodiodes |
| 02/24/2009 | US7495202 Device for detecting electromagnetic radiation |
| 02/19/2009 | WO2009023372A1 Low noise, low power, high linearity differential amplifier with a capacitive input impedance |
| 02/19/2009 | WO2009022769A1 Low power consumptive mixed mode power amplifier |
| 02/19/2009 | WO2009022640A1 Driving device |
| 02/19/2009 | WO2008148097A3 Low-power analog architecture for brain-machine interfaces |
| 02/19/2009 | US20090045878 Amplifier |
| 02/19/2009 | US20090045877 Power amplifier circuit for multi-frequencies and multi-modes and method for operating the same |
| 02/19/2009 | US20090045876 Low noise, low power, high linearity differential amplifier with a capacitive input impedance |
| 02/19/2009 | US20090045875 Data amplifying circuit controllable with swing level according to operation mode and output driver including the same |
| 02/19/2009 | US20090045874 Differential amplifier and input circuit using the same |
| 02/19/2009 | US20090045873 Close-loop class-d audio amplifier and control method thereof |
| 02/19/2009 | US20090045849 Data bus sense amplifier circuit |
| 02/19/2009 | DE102008027535A1 Funk-Signalverstärkungsvorrichtung Radio signal amplification device |
| 02/18/2009 | EP2026522A2 Method and system for polar modulation with discontinuous phase |
| 02/18/2009 | EP2025057A2 Solid state microwave power amplifier |
| 02/18/2009 | EP1854208A4 Method and apparatus for an improved power amplifier |
| 02/18/2009 | EP1787386A4 An amplifier apparatus and method |
| 02/18/2009 | CN101371435A Amplifier circuit |
| 02/18/2009 | CN101371434A Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal |
| 02/18/2009 | CN101369804A Apparatus and method for eliminating feedback common-mode signal |
| 02/18/2009 | CN101369803A Differential amplifier circuit and drive circuit of liquid crystal display unit using the same |
| 02/18/2009 | CN101369802A Closed-loop D-class power amplifier and its control method |
| 02/18/2009 | CN101369801A Distortion sensing means, automatic distortion avoiding device, and high-frequency amplifier |
| 02/18/2009 | CN100463363C High frequency power amplifier and transmitter |
| 02/18/2009 | CN100463362C 接收方法以及接收电路 The receiving method and a receiving circuit |
| 02/17/2009 | US7493180 Method for RIAA correction of audio signal with use of transformer and capacitor |
| 02/17/2009 | US7492401 Correlated-double-sampling (CDS) with amplification in image sensing device |
| 02/17/2009 | US7492230 Method and apparatus for effecting high-frequency amplification or oscillation |
| 02/17/2009 | US7492227 Method and apparatus for increasing efficiency of electrical systems |
| 02/17/2009 | US7492226 Linearization apparatus of triode region type operational transconductance amplifier |
| 02/17/2009 | US7492225 Gain-controlled amplifier |
| 02/17/2009 | US7492224 Gain variable circuit and automatic gain control amplifier using the same |
| 02/17/2009 | US7492222 Compound automatic gain control |
| 02/17/2009 | US7492220 Methods for controlling power stage of power amplifier and related apparatuses |
| 02/17/2009 | US7492219 Power efficient amplifier |
| 02/17/2009 | US7492218 Digital amplifier apparatus and method of resetting a digital amplifier apparatus |
| 02/17/2009 | US7492217 On-the-fly introduction of inter-channel delay in a pulse-width-modulation amplifier |
| 02/17/2009 | US7491925 Photodetector comprising a monolithically integrated transimpedance amplifier and evaluation electronics, and production method |
| 02/12/2009 | WO2009020325A2 Broadband power amplifier |
| 02/12/2009 | WO2009019761A1 Buffer device |
| 02/12/2009 | WO2009001254A3 Pulse width modulation circuit and class-d amplifier comprising the pwm circuit |
| 02/12/2009 | WO2008147932A3 Reconfigurable tunable rf power amplifier |
| 02/12/2009 | WO2008100494A4 Differential receiver with common-gate input stage |
| 02/12/2009 | US20090040165 Amplifying circuit and display unit |
| 02/12/2009 | US20090040059 Apparatus to Monitor Process-Based Parameters of an Integrated Circuit (IC) Substrate |
| 02/12/2009 | US20090039966 Multi-Stage RF Amplifier Including MMICs and Discrete Transistor Amplifiers in a Single Package |
| 02/12/2009 | US20090039962 High frequency power amplifier and high frequency heating device |
| 02/12/2009 | US20090039960 Low power consuming mixed mode power amplifier |
| 02/12/2009 | US20090039959 Differential amplifier, method for amplifying signals of differential amplifier, and display driving device having differential amplifier |
| 02/12/2009 | US20090039958 Operational amplifier with extended common-mode input range |