| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 05/29/2002 | CN1085906C Logarithmic amplifier circuit |
| 05/29/2002 | CN1085858C Power supply for a computer including a sound signal amplifying circuit |
| 05/28/2002 | US6396933 High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 05/28/2002 | US6396757 Multiple output current mirror with improved accuracy |
| 05/28/2002 | US6396614 Optical signal receiving circuit and method for receiving optical signal |
| 05/28/2002 | US6396430 Pre-amplifier design for high-speed analog-to-digital converters |
| 05/28/2002 | US6396352 CMOS power amplifier for driving low impedance loads |
| 05/28/2002 | US6396351 Preamplifier circuit for a photodetector |
| 05/28/2002 | US6396349 Traveling wave power combiner and radio base station |
| 05/28/2002 | US6396348 Circuit for dealing with higher harmonics and circuit for amplifying power efficiency |
| 05/28/2002 | US6396346 Low noise magneto-resistive read head preamplifier |
| 05/28/2002 | US6396343 Low-frequency, high-gain amplifier with high DC-offset voltage tolerance |
| 05/28/2002 | US6396342 Microwave amplifier generating distortion-reduced high output microwave power |
| 05/28/2002 | US6396341 Class E Doherty amplifier topology for high efficiency signal transmitters |
| 05/28/2002 | US6396340 RF power amplifier system employing AC-DC power supplies and RF combining |
| 05/28/2002 | US6396339 Operational amplifier trim method with process and temperature error compensation |
| 05/28/2002 | US6396337 Transistor circuit with direct-coupled stages |
| 05/28/2002 | US6396319 Semiconductor integrated circuit with quick charging/discharging circuit |
| 05/28/2002 | US6396311 Transconductance amplifier circuit |
| 05/23/2002 | WO2002041442A1 Reconfigurable broadband active power splitter, ditto power combiner and ditto bidirectional power splitter/power combiner and circuits based on these |
| 05/23/2002 | WO2001076346A3 High-gain, very wide common mode range, self biased operational amplifier |
| 05/23/2002 | US20020061074 Distortion compensation apparatus and distortion compensation method |
| 05/23/2002 | US20020060915 Differential current source with active common mode reduction |
| 05/23/2002 | US20020060608 Electronic apparatus comprising a power amplifier |
| 05/23/2002 | US20020060607 Novel high output swing comparator stage |
| 05/23/2002 | US20020060605 Amplifiers |
| 05/23/2002 | US20020060603 Current mirror circuit and current source circuit |
| 05/23/2002 | US20020060602 Bias voltage generator usable with circuit for producing low-voltage differential signals |
| 05/23/2002 | US20020060601 High q structure |
| 05/23/2002 | US20020060598 Linear voltage subtractor/adder circuit and MOS differential amplifier circuit therefor |
| 05/23/2002 | US20020060315 Equipment for communication system and semiconductor integrated circuit device |
| 05/23/2002 | DE10056454A1 Digital amplifier or class D amplifier using pulse width modulated control signals with pulses have temporally irregular distribution |
| 05/22/2002 | EP1206847A1 Method and arrangement for power amplification in a basestation |
| 05/22/2002 | EP1206833A1 Integrated tunable high efficiency power amplifier |
| 05/22/2002 | EP1206776A1 Pseudo-differential current sense amplifier with hysteresis |
| 05/22/2002 | CN1350767A Transducer driver |
| 05/22/2002 | CN1085441C Programmable-gain amplifier |
| 05/22/2002 | CN1085439C Semiconductor circuit having stable gain slpe |
| 05/22/2002 | CN1085438C 参考电压生成电路 A reference voltage generating circuit |
| 05/21/2002 | US6393259 Amplifier circuit and transceiver |
| 05/21/2002 | US6392492 High linearity cascode low noise amplifier |
| 05/21/2002 | US6392491 High-frequency amplifier and amplification element |
| 05/21/2002 | US6392490 High-precision biasing circuit for a cascoded CMOS stage, particularly for low noise amplifiers |
| 05/21/2002 | US6392489 Precise integrated current mirrors |
| 05/21/2002 | US6392488 Dual oxide gate device and method for providing the same |
| 05/21/2002 | US6392486 Low-noise common-gate amplifier for wireless communications |
| 05/21/2002 | US6392485 High slew rate differential amplifier circuit |
| 05/21/2002 | US6392484 Amplifier with combined pulsed energy output and linear type output |
| 05/21/2002 | US6392483 Feed-forward amplifier |
| 05/21/2002 | US6392477 Amplification circuit for electric charge type sensor |
| 05/21/2002 | US6392476 System and method of producing direct audio from a power supply |
| 05/21/2002 | US6392475 Offset compensation apparatus in a differential amplifier circuit and offset compensation method thereof |
| 05/21/2002 | US6392454 Shunt regulated push-pull circuit having wide frequency range |
| 05/21/2002 | US6392453 Differential input buffer bias circuit |
| 05/21/2002 | US6392448 Common-mode detection circuit with cross-coupled compensation |
| 05/21/2002 | US6392393 Controlled current, voltage mode driving stage |
| 05/21/2002 | US6392258 High speed heterojunction bipolar transistor, and RF power amplifier and mobile communication system using the same |
| 05/21/2002 | US6392219 Discrete filter-less optical reference receiver and output amplifier |
| 05/21/2002 | CA2363437A1 Equipment for communication system and semiconductor integrated circuit device |
| 05/16/2002 | WO2002039581A2 High speed output buffers using voltage followers |
| 05/16/2002 | WO2002039577A2 Linear modulation using a linear and a non-linear amplifier |
| 05/16/2002 | WO2001080436A3 Dual-mode communications transmitter |
| 05/16/2002 | US20020058489 Method and circuit for compensation control of offset voltages in a radio receiving circuit integrated in a circuit module |
| 05/16/2002 | US20020057133 Fast saturation recovery operational amplifier input stage |
| 05/16/2002 | US20020057132 Differential amplifier having improved balance and linearity |
| 05/16/2002 | US20020057131 High-frequency power amplifier, wireless communication apparatus and wireless communication system |
| 05/16/2002 | US20020057130 Isolator circuit |
| 05/16/2002 | US20020057115 Adaptive pulse frame rate frequency control for minimization of electro-magnetic contamination in integrated switching amplifier systems |
| 05/16/2002 | US20020057083 Power supply circuit |
| 05/16/2002 | US20020056889 Method and apparatus for adjusting impedance of matching circuit |
| 05/16/2002 | DE10053374A1 Bipolar comparator with differential amplifier stage and several transistors |
| 05/16/2002 | CA2428408A1 High speed output buffers using voltage followers |
| 05/15/2002 | EP1206033A2 Isolator circuit |
| 05/15/2002 | CN1349680A Method and apparatus for controlling the common mode impedance misbalance of an isolated sigle-ended circuit |
| 05/15/2002 | CN1084967C Transmitter having temp.-compensated detector |
| 05/15/2002 | CN1084964C 运算放大器 Operational Amplifier |
| 05/15/2002 | CN1084963C Tuning amplifier |
| 05/15/2002 | CN1084962C Tuning amplifier |
| 05/14/2002 | US6388540 Distributed constant circuit in an amplifier |
| 05/14/2002 | US6388539 Broadband switch/coupler |
| 05/14/2002 | US6388530 Microwave amplifier implemented by heterojunction field effect transistors |
| 05/14/2002 | US6388529 Grounded emitter amplifier and a radio communication device using the same |
| 05/14/2002 | US6388528 MMIC folded power amplifier |
| 05/14/2002 | US6388527 Semiconductor circuit with a stabilized gain slope |
| 05/14/2002 | US6388523 Dual-drive coupling for output amplifier stage |
| 05/14/2002 | US6388522 Common mode feedback bias for low voltage opamps |
| 05/14/2002 | US6388521 MOS differential amplifier with offset compensation |
| 05/14/2002 | US6388520 Semiconductor integrated circuit |
| 05/14/2002 | US6388519 Multi-input differential amplifier circuit |
| 05/14/2002 | US6388518 Distortion compensation apparatus |
| 05/14/2002 | US6388517 Input change-over type amplifier and frequency change-over type oscillator using the same |
| 05/14/2002 | US6388516 Precision high speed magnetic coil driver circuit |
| 05/14/2002 | US6388514 Class D high voltage amplifier system with adaptive power supply |
| 05/14/2002 | US6388508 Current mirror circuit and current source circuit |
| 05/14/2002 | US6388507 Voltage to current converter with variation-free MOS resistor |
| 05/14/2002 | US6388502 Semiconductor integrated circuit |
| 05/14/2002 | US6388496 Semiconductor output circuit |
| 05/14/2002 | US6388494 Offset trim using hot-electron induced VT-shifts |
| 05/14/2002 | US6388477 Switchable voltage follower and bridge driver using the same |
| 05/10/2002 | WO2002037896A1 Portable multi-channel amplifier |