H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements

Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008)
08/2002
08/28/2002	EP1235343A2 Microwave oscillator having improved phase noise of oscillation signal
08/28/2002	EP1234377A1 Power booster amplifier
08/28/2002	EP1080512A4 Microwave channelized bandpass filter having two channels
08/28/2002	CN2508459Y 基站功率放大器 Base station power amplifiers
08/28/2002	CN1366733A Accurate power detection circuit for use in power amplifier
08/28/2002	CN1089967C Amplifier circuit for sound frequency signal
08/27/2002	US6441689 Transistor amplifier providing improved linear and return loss performance characteristics
08/27/2002	US6441688 Single-to-differential buffer amplifier
08/27/2002	US6441685 Amplifier circuit and method for providing negative feedback thereto
08/27/2002	US6441684 Variable gain amplifier system
08/27/2002	US6441671 Digital trim capacitor programming
08/27/2002	CA2189550C Phase linear class e amplifier for a satellite communication system
08/22/2002	WO2002065649A2 Amplifier phase change compensation
08/22/2002	WO2002065636A1 Hybrid audio amplifier
08/22/2002	WO2002065634A2 Power amplifier system having frequency and amplifier failure compensation
08/22/2002	WO2002065226A1 Attenuator circuit
08/22/2002	WO2002049208A3 Differential amplifier with large input common mode signal range
08/22/2002	WO2002047251A3 Low noise amplifier having bypass circuitry
08/22/2002	WO2002031997A3 High frequency amplification circuit
08/22/2002	WO2002019545A8 System for closed loop power control using a linear or a non-linear power amplifier
08/22/2002	US20020115417 Method for reducing interference in transmitter and transmitter
08/22/2002	US20020115416 Calibration of in-phase and quadrature transmit branches of a transmitter
08/22/2002	US20020113661 Microwave oscillator having improved phase noise of oscillation signal
08/22/2002	US20020113656 Amplifier
08/22/2002	US20020113655 Divided-voltage fet power amplifiers
08/22/2002	US20020113652 Amplifier circuit
08/22/2002	US20020113651 Instrumentation amplifier
08/22/2002	US20020113650 Amplifier and mixer with improved linearity
08/22/2002	US20020113645 Photodetector preamplifier circuit having a rotating input stage
08/22/2002	US20020113627 Input buffer circuit capable of suppressing fluctuation in output signal and reducing power consumption
08/22/2002	US20020113626 Differential line driver having adjustable common mode operation
08/22/2002	US20020113586 Method and apparatus for offset correction
08/22/2002	CA2437921A1 Hybrid audio amplifier
08/22/2002	CA2432888A1 Power amplifier system having frequency and amplifier failure compensation
08/21/2002	EP1232643A1 A low insertion loss current sense circuit
08/21/2002	EP1232587A1 Method and apparatus for generating an rf signal
08/21/2002	EP1232565A2 High efficiency power amplifier
08/21/2002	EP1232564A1 Power amplifiers
08/21/2002	EP1232555A1 Pulse-width modulated bridge circuit within a second bridge circuit
08/21/2002	CN1365537A Amplified circuit
08/21/2002	CN1365185A Feedback type amplifying circuit and driving circuit
08/21/2002	CN1089506C 驱动级 Driver stage
08/20/2002	US6438406 Voltage sensing system with input impedance balancing for electrocardiogram (ECG) sensing applications
08/20/2002	US6438365 Balanced mixer with feedback pre-amplifier
08/20/2002	US6438364 Radio frequency device with fast charging of an input capacitance
08/20/2002	US6438237 3D woofer drive circuit
08/20/2002	US6437806 Method of forwarding electronic mail and a mailing system
08/20/2002	US6437649 Microwave amplifier
08/20/2002	US6437648 Audio amplifier with transformerless power supply
08/20/2002	US6437647 Current mirror compensation system for power amplifiers
08/20/2002	US6437645 Slew rate boost circuitry and method
08/20/2002	US6437643 Variable gain amplifier
08/20/2002	US6437642 Multiport amplifier with a number of amplifier elements other than 2
08/20/2002	US6437622 Temperature compensated slew rate control circuit
08/20/2002	CA2306227C Distributed gain line driver amplifier
08/15/2002	WO2002063768A1 Circuits with dynamic biasing
08/15/2002	WO2002063761A2 Photodetector preamplifier circuit having a rotating input stage
08/15/2002	WO2002035756A3 Active continuous-time filter with increased dynamic range in the presence of blocker signals
08/15/2002	WO2002019551A3 Circuits and methods for reducing interference from switched mode circuits
08/15/2002	US20020109551 Amplifier circuit and method for reducing stray feedback
08/15/2002	US20020109549 High frequency power amplifier module, and wireless communications system
08/15/2002	US20020109548 Power amplifying circuit
08/15/2002	US20020109547 Slew rate boost circuitry and method
08/15/2002	US20020109546 Fully differential, variable-gain amplifier and a multidimensional amplifier arrangement
08/15/2002	US20020109544 Hybrid audio amplifier
08/15/2002	US20020109543 Method for reusing resource for designing operational amplifier, layout generating apparatus, and layout generating program
08/15/2002	US20020109075 DC offset cancellation circuit, differential amplification circuit with DC offset cancellation circuit, photo-electric pulse conversion circuit, pulse shaping circuit, and pulse generation circuit
08/14/2002	EP1231709A1 Amplifier
08/14/2002	EP1231640A1 Semiconductor device
08/14/2002	EP1230734A1 Adaptive dead time control for push-pull switching circuits
08/14/2002	EP1230731A1 Transconductor with controllable transconductance for low supply voltages
08/14/2002	EP1230730A1 Amplifier with improved, high precision, high speed and low power consumption architecture
08/14/2002	DE10140404A1 Anpassungsschaltung und Halbleitervorrichtung hiermit Matching circuit and semiconductor device hereby
08/14/2002	CN1364336A 放大器电路 Amplifier circuit
08/14/2002	CN1364042A Assembled network for changeable route power amplifier
08/13/2002	US6433711 System and method for offset error compensation in comparators
08/13/2002	US6433658 High Q structure
08/13/2002	US6433641 Power amplifier and communication device including power amplifier
08/13/2002	US6433640 Methods and apparatus for amplifying a telecommunication signal
08/13/2002	US6433639 High frequency power amplifier module and wireless communication system
08/13/2002	US6433638 Fully balanced transimpedance amplifier for high speed and low voltage applications
08/13/2002	US6433637 Single cell rail-to-rail input/output operational amplifier
08/13/2002	US6433636 Operational amplifier designed to have increased output range
08/13/2002	US6433635 Amplifier
08/13/2002	US6433634 Electronic circuit for providing a desired common mode voltage to a differential output of an amplifier stage
08/13/2002	US6433632 Correlated double sampling circuit with op amp
08/08/2002	WO2002062103A2 Audio sound quality enhancement apparatus
08/08/2002	WO2002061942A1 Audio reproducing apparatus and method
08/08/2002	WO2002061941A1 Audio reproducing apparatus and method
08/08/2002	WO2002061940A1 Cmos power amplifier with reduced harmonics and improved efficiency
08/08/2002	WO2002061939A1 Current mirror compensation system for power amplifiers
08/08/2002	WO2002061519A2 Bias circuit for maintaining a constant value of transconductance divided by load capacitance
08/08/2002	WO2002031966A3 Class e/f switching power amplifiers
08/08/2002	WO1998026501A9 Class d amplifier
08/08/2002	US20020105817 Method and apparatus for improving voltage to current signal conversion
08/08/2002	US20020105385 Preamplifier circuit for a photodetector
08/08/2002	US20020105384 Harmonic matching network for a saturated amplifier
08/08/2002	US20020105383 Active radio frequency cavity amplifier
08/08/2002	US20020105381 Process-insensitive, highly-linear constant transconductance circuit
08/08/2002	US20020105380 CMOS transceiver having an integrated power amplifier

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