| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 09/16/2003 | US6621253 Amplifier having a variable power factor |
| 09/16/2003 | US6621144 Data receiver gain enhancement |
| 09/12/2003 | WO2003075456A1 Mute circuit for preventing pop noise, and speaker drive circuit |
| 09/12/2003 | WO2003075455A2 Amplifier circuits and their use in radio frequency transmitters |
| 09/12/2003 | WO2003075454A2 Operational amplifier with increased common mode input range |
| 09/12/2003 | WO2002056647A3 Circuit for linearizing electronic devices |
| 09/12/2003 | WO2002029969A3 Power control of switched-mode power amplifiers with one or more stages |
| 09/11/2003 | US20030169119 Signal modulation |
| 09/11/2003 | US20030169115 Transconductor tuning circuit |
| 09/11/2003 | US20030169114 Adjustable gain control system and method thereof |
| 09/11/2003 | US20030169113 Reconfigurable distributed active transformers |
| 09/11/2003 | US20030169111 Operational amplifier input stage and method |
| 09/11/2003 | US20030169107 Method and system for proportional plus integral loop compensation using a hybrid of switched capacitor and linear amplifiers |
| 09/11/2003 | US20030169106 Power supply for guitar amplifier |
| 09/11/2003 | US20030169105 Cross-differential amplifier |
| 09/11/2003 | US20030169104 Miller de-compensation for differential input, differential output amplifier |
| 09/11/2003 | US20030169103 Switching power amplifier, and switching control method for a switching power amplifier |
| 09/11/2003 | US20030169093 Circuit arrangement for controlling a constant current through a load |
| 09/11/2003 | US20030169080 Transconductor having structure of crossing pairs |
| 09/11/2003 | US20030169079 Method for operating a comparator and a pre-amplifier of an integrated circuit, which pre-amplifier is connected in series to the comparator, as well as an integrated circuit arrangement comprising a comparator and a pre-amplifier which is connected in series to the comparator |
| 09/11/2003 | US20030169076 Input buffer circuit and semiconductor memory device |
| 09/11/2003 | US20030169074 Low-voltage drive circuit and method for the same |
| 09/11/2003 | US20030168986 Multiple stage depressed collector (MSDC) klystron based amplifier for ground based satellite and terrestrial communications |
| 09/10/2003 | EP1264395B1 Improved method and apparatus for improving the efficiency of power amplifiers, operating under a large peak-to-average ratio |
| 09/10/2003 | CN2572670Y Frequency mixingantenna amplifier |
| 09/10/2003 | CN1441547A Differential circuit, amplifying circuit, driving circuit and display device using them |
| 09/10/2003 | CN1441546A 光接收电路 Light receiving circuit |
| 09/10/2003 | CN1441545A 功率放大器 PA |
| 09/09/2003 | US6617929 Full output matching apparatus of a microwave doherty amplifier |
| 09/09/2003 | US6617927 High frequency power amplifier module, and wireless communications system |
| 09/09/2003 | US6617926 Tail current node equalization for a variable offset amplifier |
| 09/09/2003 | US6617924 Operational amplifier having large output current with low supply voltage |
| 09/09/2003 | US6617923 Linear transconductance amplifier |
| 09/09/2003 | US6617922 Differential difference amplifier for amplifying small signals close to zero volts |
| 09/09/2003 | US6617921 High output swing comparator stage |
| 09/09/2003 | US6617919 RF amplifier |
| 09/09/2003 | US6617918 Multi-level receiver circuit with digital output using a variable offset comparator |
| 09/09/2003 | US6617908 Switched-capacitor circuits with reduced distortion |
| 09/09/2003 | US6617905 System and method for threshold bias offset voltage cancellation in a comparator |
| 09/09/2003 | US6617887 Differential comparator with offset correction |
| 09/09/2003 | US6617838 Current measurement circuit |
| 09/09/2003 | US6617835 MOS type reference voltage generator having improved startup capabilities |
| 09/09/2003 | US6617567 Analog pre-processor with improved input common mode range |
| 09/04/2003 | WO2003073627A1 High-frequency power amplifier circuit and electronic part for communication |
| 09/04/2003 | WO2003073605A1 High-frequency amplifier |
| 09/04/2003 | WO2003073603A2 Current modulator with dynamic amplifier impedance compensation |
| 09/04/2003 | WO2002062103B1 Audio sound quality enhancement apparatus |
| 09/04/2003 | WO2002015387A3 Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control |
| 09/04/2003 | US20030164737 High frequency circuit |
| 09/04/2003 | US20030164736 High efficiency amplifier |
| 09/04/2003 | US20030164734 Electric field intensity detecting circuit and limiter amplifier |
| 09/04/2003 | US20030164731 Differential transimpedance amplifier for optical communication |
| 09/04/2003 | US20030164730 High duty cycle offset compensation for operational amplifiers |
| 09/04/2003 | US20030164723 Output buffer circuit |
| 09/03/2003 | EP1341303A1 High-frequency amplifier and high-frequency mixer |
| 09/03/2003 | EP1341302A2 Btl amplifying system |
| 09/03/2003 | EP1341298A1 Oscillator |
| 09/03/2003 | CN2571068Y Non-contact inductive volume regulating device |
| 09/03/2003 | CN1440589A RF power amplifier having high power added efficiency |
| 09/03/2003 | CN1440119A 振荡器 Oscillators |
| 09/03/2003 | CN1120648C Receiving loop of honey-comb type telephone |
| 09/03/2003 | CN1120622C Radio frequency device |
| 09/03/2003 | CN1120573C Circuit device for deviation compensation |
| 09/02/2003 | US6615028 System and method for selecting amplifiers in a communications device |
| 09/02/2003 | US6614588 Optical amplifier having various control circuitry |
| 09/02/2003 | US6614312 Low noise amplifier and imaging element using same |
| 09/02/2003 | US6614311 Micro-wave power amplifier |
| 09/02/2003 | US6614308 Multi-stage, high frequency, high power signal amplifier |
| 09/02/2003 | US6614307 Hybrid structure for distributed power amplifiers |
| 09/02/2003 | US6614306 Bias circuit for class AB high frequency amplifiers |
| 09/02/2003 | US6614305 Method and circuit for trimming offset and temperature drift for operational amplifiers and voltage references |
| 09/02/2003 | US6614304 Variable gain circuit having external controls and a low supply voltage |
| 09/02/2003 | US6614303 Signal dependent current controlled amplifier and method of performing same |
| 09/02/2003 | US6614302 CMOS operational amplifier circuit |
| 09/02/2003 | US6614301 Differential amplifier offset adjustment |
| 09/02/2003 | US6614299 Method and system for automated current balance adjustment for parallel combined amplification elements |
| 09/02/2003 | US6614297 Modulation scheme for filterless switching amplifiers with reduced EMI |
| 09/02/2003 | US6614296 Equalization of a transmission line signal using a variable offset comparator |
| 09/02/2003 | US6614295 Feedback-type amplifier circuit and driver circuit |
| 09/02/2003 | US6614280 Voltage buffer for large gate loads with rail-to-rail operation and preferable use in LDO's |
| 09/02/2003 | US6614272 Signal voltage detection circuit |
| 08/28/2003 | WO2003071674A1 Circuit and method for switching gains of preamplifier |
| 08/28/2003 | WO2002093979A3 Dynamic allocation of power supply |
| 08/28/2003 | WO2001091304A3 Method and apparatus for use in switched capacitor systems |
| 08/28/2003 | US20030162516 Distributed automatic gain control system |
| 08/28/2003 | US20030161640 Optical receiving circuit |
| 08/28/2003 | US20030161465 Zero crossing detection circuit |
| 08/28/2003 | US20030160749 Differential circuit, amplifier circuit, driver circuit and display device using those circuits |
| 08/28/2003 | US20030160659 Transimpedance amplifier |
| 08/28/2003 | US20030160658 Power supply processing for power amplifiers |
| 08/28/2003 | US20030160657 CMOS differential amplifier |
| 08/28/2003 | US20030160655 Antenna amplifier |
| 08/28/2003 | US20030160653 BTL amplifying system |
| 08/28/2003 | US20030160652 Amplifier device with a selectable active or passive operational mode and ultrasonic apparatus |
| 08/28/2003 | US20030160639 Semiconductor integrated circuit device |
| 08/27/2003 | EP1338089A2 Active continuous-time filter with increased dynamic range in the presence of blocker signals |
| 08/27/2003 | EP1338086A1 Amplifier circuit, an optical communication system and a method of controlling amplification |
| 08/27/2003 | EP1131885B1 Circuit and method for linearizing amplitude modulation in a power amplifier |
| 08/27/2003 | CN2569446Y Preamplifier for diaphragm gripping instrument |
| 08/27/2003 | CN1438771A Optical receiver ampeifier and optical pick-up device adopting said circuit |