| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 03/11/2009 | CN101383595A Electronic volume ajuster and audio device using thereof and abnormity detection method |
| 03/11/2009 | CN101383593A Pre-amplifier for a receiver and a method therefor |
| 03/11/2009 | CN101383592A Power amplifier and method for reducing common mode noise thereof |
| 03/11/2009 | CN101383118A Display unit and display panel driver |
| 03/11/2009 | CN100468964C Power amplification apparatus, and mobile communication terminal apparatus |
| 03/11/2009 | CN100468963C Sampling signal amplifier |
| 03/11/2009 | CN100468962C Amplifier circuit |
| 03/11/2009 | CN100468961C Differential amplifier, output circuit, display device and data driver |
| 03/11/2009 | CN100468960C Class-D amplifier |
| 03/11/2009 | CN100468959C Digital PWM input D class amplifier by PMW negative feedback |
| 03/11/2009 | CN100468958C Power management method and unit |
| 03/11/2009 | CN100468957C Method for self-adaptive cancellation control of feedforward linear power amplifier optimizing model |
| 03/11/2009 | CN100468955C Cascode and serial low-noise amplifier implemented by single-end input and differential output |
| 03/11/2009 | CN100468954C Sequential DC offset correction for amplifier chain |
| 03/10/2009 | US7502601 Power amplifier with digital power control and associated methods |
| 03/10/2009 | US7502600 Dynamic bias for RF power amplifiers |
| 03/10/2009 | US7502599 Cartesian loop transmitter and method of adjusting an output level of such transmitter |
| 03/10/2009 | US7502569 Optical receiver preamplifier |
| 03/10/2009 | US7502422 Electromagnetic wave transmitter systems, methods and articles of manufacture |
| 03/10/2009 | US7501914 Bias circuit |
| 03/10/2009 | US7501898 Method and apparatus for generating an optimized reference current threshold |
| 03/10/2009 | US7501897 High-power amplifier |
| 03/10/2009 | US7501896 High frequency power amplifier circuit, high frequency power amplifier electronic component and method thereof |
| 03/10/2009 | US7501894 Method of forming an operational amplifier and structure therefor |
| 03/10/2009 | US7501893 Variable gain amplifier circuit |
| 03/10/2009 | US7501892 Amplifier circuit and communication device |
| 03/10/2009 | US7501891 Variable gain amplifier and differential amplifier |
| 03/10/2009 | US7501890 Multi-amplifier circuit |
| 03/10/2009 | US7501889 Method and apparatus for implementing soft switching in a class D amplifier |
| 03/10/2009 | US7501888 Gain control methods and systems in an amplifier assembly |
| 03/10/2009 | US7501887 Controllable amplifier and its use |
| 03/10/2009 | US7501886 Low distortion class-D amplifier |
| 03/10/2009 | US7501853 Data processing circuit |
| 03/05/2009 | WO2009029916A1 Systems and methods for controlling audio volume in the processor of a high definition audio codec |
| 03/05/2009 | WO2009029563A2 Audio amplifiers and methods of generating audio signals |
| 03/05/2009 | WO2009029284A1 Differential pair circuit |
| 03/05/2009 | WO2009027887A1 A device for and a method of generating signals |
| 03/05/2009 | WO2009027581A1 Signal amplifier structure for radio transmitter |
| 03/05/2009 | WO2009026704A1 Splitter/combiner and waveguide amplifier incorporating splitter/combiner |
| 03/05/2009 | WO2009008975A3 Balanced amplifier with protection circuit |
| 03/05/2009 | WO2008142051A3 Switchable multiband lna design |
| 03/05/2009 | WO2005036733A3 Differential amplifier arrangement |
| 03/05/2009 | US20090058534 Non-inverting amplifier circuit and optical switch driver circuit |
| 03/05/2009 | US20090058533 Voltage generating apparatus and methods |
| 03/05/2009 | US20090058532 Nitride semiconductor device, doherty amplifier and drain voltage controlled amplifier |
| 03/05/2009 | US20090058530 High-voltage transconductance circuit |
| 03/05/2009 | US20090058529 Resistively Loaded Single Stage Differential Amplifier Having Zero Volt Common Mode Input |
| 03/05/2009 | US20090058528 Pre-Amplifier for a Receiver and a Method therefor |
| 03/05/2009 | US20090058527 Common Mode Stabilization In A Fully Differential Amplifier |
| 03/05/2009 | US20090058526 Common mode feedback amplifier with switched differential capacitor |
| 03/05/2009 | US20090058525 Common-mode bandwidth reduction circuit and method for differential applications |
| 03/05/2009 | US20090058524 Received signal strength indicator self-calibrating gain of limiter |
| 03/05/2009 | US20090058523 Amplifying circuit |
| 03/05/2009 | US20090058522 Differential amplifier |
| 03/05/2009 | US20090058519 Variable Automatic Limit Control (ALC) Threshold for any Desired Compression Curve |
| 03/05/2009 | US20090058469 Methods and systems for comparing currents using current conveyor circuitry |
| 03/05/2009 | DE102008024520A1 Vorrichtung und Verfahren für asymmetrische Ladungspumpe für einen Audioverstärker Apparatus and method for asymmetric charge pump for an audio amplifier |
| 03/04/2009 | EP2031761A1 Communication device and electronic apparatus using the same |
| 03/04/2009 | EP2030321A1 Transmitter with pre-conditioning of amplifier signal |
| 03/04/2009 | EP2030317A1 High efficiency linear power amplifiers with load compensation |
| 03/04/2009 | EP1989776A4 Method and apparatus for controlling an output voltage in a power amplifier |
| 03/04/2009 | EP1969715A4 Dc offset correction for high gain complex filter |
| 03/04/2009 | EP1766777A4 Improved integrated circuit implementation for power and area efficient adaptive equalization |
| 03/04/2009 | EP1563620A4 Lower complexity layered modulation signal processor |
| 03/04/2009 | EP1561291B1 Amplitude and phase matching for layered modulation reception |
| 03/04/2009 | EP1428314B1 Ping-pong amplifier with auto-zeroing and chopping |
| 03/04/2009 | CN201204568Y Audio power amplification circuit |
| 03/04/2009 | CN201204567Y Radio-frequency amplifier and mobile communication receiver |
| 03/04/2009 | CN201203506Y Power output circuit of electric oscillating table |
| 03/04/2009 | CN201203444Y High input impedance difference preliminary amplifier circuit of ultrasonic flowmeter |
| 03/04/2009 | CN101379698A PWM feedback/feed-forward protection |
| 03/04/2009 | CN101379697A Power amplifier with digital pre-distorsion |
| 03/04/2009 | CN101378601A Drive apparatus for electrostatic loudspeaker |
| 03/04/2009 | CN101378247A Low conductor amplifier |
| 03/04/2009 | CN100466482C Method for moving communication terminal and optimizing an operating point of a power amplifier |
| 03/04/2009 | CN100466474C Voltage-current conversion circuit device |
| 03/04/2009 | CN100466466C Millimeter wave amplifier |
| 03/04/2009 | CN100466465C Method and device used for inhibiting return effect in circuit |
| 03/04/2009 | CN100466464C Method and apparatus used for controlling predistortion linearizer based on power series |
| 03/04/2009 | CN100466462C Dynamic bias circuit of a radio-frequency amplifier |
| 03/04/2009 | CN100466100C Apparatus for generating driving voltage for sense amplifier in a memory device |
| 03/03/2009 | US7499502 Amplifier, information communication apparatus and amplification method |
| 03/03/2009 | US7499105 Compensation circuit for frequency filters |
| 03/03/2009 | US7498883 Distributed amplifier with built-in filtering functions |
| 03/03/2009 | US7498881 Switching audio power amplifier and method for pop noise suppression |
| 03/03/2009 | US7498880 Class L amplifier |
| 03/03/2009 | US7498879 Summing comparator for higher order class D amplifiers |
| 03/03/2009 | US7498878 Multi-path doherty amplifier and control method of a multi-path doherty amplifier |
| 03/03/2009 | US7498876 Amplifier having half-wave tracking power rails |
| 03/03/2009 | US7498843 Current-controlled CMOS circuits with inductive broadbanding |
| 02/26/2009 | WO2009026469A1 High-swing operational amplifier output stage using adaptive biasing |
| 02/26/2009 | WO2009025795A1 Multi-mode power amplifier with high efficiency under backoff operation |
| 02/26/2009 | WO2009025083A1 Antenna device and electronic apparatus having the antenna device mounted therein |
| 02/26/2009 | WO2009025021A1 Transmission circuit, wireless base station device, and wireless terminal device |
| 02/26/2009 | WO2009025008A1 Amplifier |
| 02/26/2009 | WO2009006093A3 Methods and apparatus to control rail-to-rail class ab amplifiers |
| 02/26/2009 | WO2008147980A3 Multi-mode audio amplifiers |
| 02/26/2009 | US20090054004 Biasing for Stacked Circuit Configurations |
| 02/26/2009 | US20090052590 Layered modulation for digital signals |
| 02/26/2009 | US20090051442 Transimpedance amplifier circuit for optical receiver in optical communication system |