| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 01/14/2009 | CN100452648C Active radio frequency cavity amplifier |
| 01/14/2009 | CN100452647C Voltage follower of small output resistance, large output amplitude |
| 01/14/2009 | CN100452646C Single-side shift compensating method for operational amplifier |
| 01/14/2009 | CN100452645C Power amplifying device |
| 01/14/2009 | CN100452644C Method for realizing memory-type power amplifier linearization and its baseband predistortion device |
| 01/13/2009 | US7477888 Low noise and low voltage mixer and intermediate frequency module application thereof |
| 01/13/2009 | US7477109 Process and temperature-compensated transimpedance amplifier |
| 01/13/2009 | US7477108 Thermally distributed integrated power amplifier module |
| 01/13/2009 | US7477107 Protection circuit and method for RF power amplifiers in WLAN transceivers |
| 01/13/2009 | US7477106 Power amplifier with bias control |
| 01/13/2009 | US7477105 Amplifier arrangement and method for amplifying a signal |
| 01/13/2009 | US7477104 Power amplifier circuit and test apparatus |
| 01/13/2009 | US7477103 Amplifier circuit |
| 01/13/2009 | US7477076 Low-voltage, low-power-consumption, and high-speed differential current-sense amplification |
| 01/13/2009 | US7476839 Amplifier circuit for optical disk drive |
| 01/08/2009 | WO2009006578A2 Systems and methods for saturation detection and correction in a power control loop |
| 01/08/2009 | WO2009006123A1 Amplifier with configurable dc-coupled or ac-coupled output |
| 01/08/2009 | WO2009006093A2 Methods and apparatus to control rail-to-rail class ab amplifiers |
| 01/08/2009 | WO2009005430A1 Improved amplifying device |
| 01/08/2009 | WO2009005345A1 Pwm amplifier |
| 01/08/2009 | WO2008115749A3 Power efficient multistage amplifier and design method |
| 01/08/2009 | WO2008042550A4 Amplifier containing programmable impedance for harmonic termination |
| 01/08/2009 | US20090011732 Tuning circuitry utilizing frequency translation of an impedance from a fixed-filter frequency response |
| 01/08/2009 | US20090009253 Analog circuit |
| 01/08/2009 | US20090009249 Input Stage |
| 01/08/2009 | US20090009248 Input buffer with optimal biasing and method thereof |
| 01/08/2009 | US20090009247 Differential amplifier and sampling and holding circuit |
| 01/08/2009 | US20090009246 Electronic circuit |
| 01/08/2009 | US20090009244 High-frequency circuit |
| 01/08/2009 | US20090009241 Power amplifier using power combiner |
| 01/08/2009 | US20090009236 Step-down circuit with stabilized output voltage |
| 01/08/2009 | US20090008774 Semiconductor device |
| 01/08/2009 | US20090008535 Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same |
| 01/08/2009 | US20090008534 Photodetector Circuit |
| 01/08/2009 | DE112004002875B4 Temperaturkompensierte Vorspannungsschaltung für einen Leistungsverstärker A temperature-compensated bias circuit for a power amplifier |
| 01/08/2009 | DE10211609B4 Verfahren und Leistungsverstärker zur Erzeugung von sinusförmigen Hochfrequenzsignalen zum Betreiben einer Last A process and power amplifiers for generating high-frequency sinusoidal signals for driving a load |
| 01/07/2009 | EP2011260A2 Method and apparatus for adaptively controlling signals |
| 01/07/2009 | EP2011231A1 Output networks in combination with linc technique |
| 01/07/2009 | EP1935089B1 Systems, methods and devices for dual closed loop modulation controller for nonlinear rf amplifier |
| 01/07/2009 | EP1709733A4 Improved power supply rejection for pulse width modulated amplifiers and automatic gain control |
| 01/07/2009 | EP1456943B8 Attenuation control for digital power converters |
| 01/07/2009 | CN201178401Y Reverse non-linear amplifier circuit having temperature compensation |
| 01/07/2009 | CN201177810Y Computer mainboard integrating operational amplifier function of earphone |
| 01/07/2009 | CN101341654A Input drive control for switcher regulated power amplifier modules |
| 01/07/2009 | CN101341653A Improved control of switcher regulated power amplifier modules |
| 01/07/2009 | CN101340178A Transmitting apparatus |
| 01/07/2009 | CN101340076A Dual-window voltage comparator wire and delay converting circuit |
| 01/07/2009 | CN101339443A Broad output current scope low pressure difference linear manostat |
| 01/07/2009 | CN100449939C Injection circuit with external predistortion |
| 01/06/2009 | US7474158 Dynamic match low noise amplifier with reduced current consumption in low gain mode |
| 01/06/2009 | US7474157 Power amplifier |
| 01/06/2009 | US7474156 Impedance transformer for amplifier and amplifier including the same |
| 01/06/2009 | US7474155 Power amplifier |
| 01/06/2009 | US7474154 Bias device clamping circuit for fast over-range recovery |
| 01/06/2009 | US7474153 Dual stage source/sink amplifier circuit with quiescent current determination |
| 01/06/2009 | US7474152 Operational amplifier circuit |
| 01/06/2009 | US7474151 Active load with adjustable common-mode level |
| 01/06/2009 | US7474150 Amplifier composite triple beat (CTB) reduction by phase filtering |
| 01/06/2009 | US7473883 Amplification with feedback capacitance for photodetector signals |
| 01/06/2009 | US7473881 Image sensor |
| 01/01/2009 | US20090003618 Headphone driver/charge pump combination |
| 01/01/2009 | US20090002078 Preamplifier and optical receiving device including the same |
| 01/01/2009 | US20090002077 Monolithic flexible power amplifier using integrated tunable matching networks |
| 01/01/2009 | US20090002075 Amplifier with configurable dc-coupled or ac-coupled output |
| 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 | US20090002070 Methods and apparatus to control rail-to-rail class ab amplifiers |
| 12/31/2008 | WO2009001872A1 Signal conversion circuit and rail-to-rail circuit |
| 12/31/2008 | WO2009001254A2 Pulse width modulation circuit and class-d amplifier comprising the pwm circuit |
| 12/31/2008 | WO2009001233A1 Power-efficient transmitter for magnetic link |
| 12/31/2008 | WO2009000236A2 High-dynamic ammeter with small time constant |
| 12/31/2008 | WO2009000234A1 Apparatus for sensorless positioning with signal amplifier |
| 12/31/2008 | WO2008132668A3 Tunable multi frequency bands filter device |
| 12/31/2008 | WO2008030859A3 Reduction of voltage spikes in switching half-bridge stages |
| 12/31/2008 | WO2007123792A3 Switching power amplifier |
| 12/31/2008 | EP2008360A2 Elimination of dummy detector on optical detectors using input common mode feedback |
| 12/31/2008 | EP1844546B1 Arrangement for amplifying a pwm input signal |
| 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 | CN101335504A Radio-frequency power amplifier for amplitude modulation and UHF radio frequency identification tag |
| 12/31/2008 | CN101335503A 前置放大器和光接收装置 Preamplifier and a light receiving device |
| 12/31/2008 | CN100448166C Amplifier circuit |
| 12/30/2008 | US7471941 Amplifier assembly including variable gain amplifier, parallel programmable amplifiers, and AGC |
| 12/30/2008 | US7471226 Radio frequency digital-to-analog converter |
| 12/30/2008 | US7471156 Amplifier containing programmable impedance for harmonic termination |
| 12/30/2008 | US7471155 Cancelling switching power supply ripple from a radio frequency signal |
| 12/30/2008 | US7471154 Bias circuit for maintaining high linearity at cutback power conditions |
| 12/30/2008 | US7471153 Multi-primary distributed active transformer amplifier power supply and control |
| 12/30/2008 | US7471152 Automatic gain control and tuned low noise amplifier for process-independent gain systems |
| 12/30/2008 | US7471151 Circuits for quiescent current control |
| 12/30/2008 | US7471150 Class AB folded cascode stage and method for low noise, low power, low-offset operational amplifier |
| 12/30/2008 | US7471149 Multi-amplifier circuit |
| 12/30/2008 | US7471148 Differential low noise amplifier (LNA) with common mode feedback and gain control |
| 12/30/2008 | US7471147 Automatic gain controller |
| 12/30/2008 | US7471145 Procedure and circuit device for the subtraction of electrical signals |
| 12/30/2008 | US7471144 Low distortion class-D amplifier |
| 12/30/2008 | US7471139 Voltage buffer for capacitive loads |