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Class Information
Number: 330/259
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including differential amplifier > Having d.c. feedback bias control for stabilization
Description: Subject matter including a feedback circuit for direct currents for the purpose of operating point stabilization.










Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
5038375 Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer Aug. 6, 1991
5034700 Integratable amplifier circuit Jul. 23, 1991
5023568 Combined current differencing and operational amplifier circuit Jun. 11, 1991
5015967 Integratable amplifier circuit May. 14, 1991
5010303 Balanced integrated circuit differential amplifier Apr. 23, 1991
5008632 Temperature compensated feedback circuit for setting and stabilizing amplifier DC bias points Apr. 16, 1991
4992755 Transistor circuit Feb. 12, 1991
4987379 Operational amplifier circuit Jan. 22, 1991
4963837 Amplifiers Oct. 16, 1990
4959622 Operational amplifier with precise bias current control Sep. 25, 1990
4958133 CMOS complementary self-biased differential amplifier with rail-to-rail common-mode input-voltage range Sep. 18, 1990
4939477 Output circuit having a terminal used for a plurality of signals Jul. 3, 1990
4939516 Chopper stabilized delta-sigma analog-to-digital converter Jul. 3, 1990
4916734 Apparatus for separating dc current and ac current components of a composite signal Apr. 10, 1990
4896120 Instrumentation amplifier arrangement Jan. 23, 1990
4891604 High speed low input current voltage follower stage Jan. 2, 1990
4888559 Correction arrangement for an amplifier Dec. 19, 1989
4862102 Method and apparatus for minimizing the self heating distortion of a compensated differential transconductance amplifier Aug. 29, 1989
4849709 Variable frequency characteristic circuit for a vehicular sound device Jul. 18, 1989
4833418 Compensation circuit for nullifying differential offset voltage and regulating common mode voltage of differential signals May. 23, 1989
4829264 All NPN differential to single ended amplifier May. 9, 1989
4829267 Automatic DC restorer stage for servo data amplifier May. 9, 1989
4806875 Precision operational amplifier Feb. 21, 1989
4769616 High-frequency differential amplifier stage and amplifier comprising such a differential amplifier stage Sep. 6, 1988
4731588 Gain selectable amplifier with resonance compensation Mar. 15, 1988
4730168 CMOS output stage with large voltage swing and with stabilization of the quiescent current Mar. 8, 1988
4724315 Optical receiver Feb. 9, 1988
4714896 Precision differential amplifier having fast overdrive recovery Dec. 22, 1987
4703284 High-frequency amplifier Oct. 27, 1987
4698599 Differential summing amplifier for inputs having large common mode signals Oct. 6, 1987
4667166 Differential amplifier system May. 19, 1987
4639684 Differential input stage for the realization of low noise and high precision bipolar transistor amplifiers Jan. 27, 1987
4628280 Amplifier arrangement Dec. 9, 1986
4626770 NPN band gap voltage reference Dec. 2, 1986
4618833 Operational amplifier offset trim that does not change the offset potential temperature drift Oct. 21, 1986
4595883 Emitter-follower type single-ended push-pull circuit Jun. 17, 1986
4590458 Offset removal in an analog to digital conversion system May. 20, 1986
4577336 Integrable frequency divider circuit having a feedback controlled differential amplifier as its preamplifier circuit Mar. 18, 1986
4538114 Differential amplifier Aug. 27, 1985
4529947 Apparatus for input amplifier stage Jul. 16, 1985
4511853 Differential amplifier circuit having improved control signal filtering Apr. 16, 1985
4498053 Current amplifier Feb. 5, 1985
4490682 Instrumentation amplifier having automatic offset adjustment Dec. 25, 1984
4462002 Trimming circuits for precision amplifier Jul. 24, 1984
4460873 Active differential output direct current offset voltage compensation circuit for a differential amplifier Jul. 17, 1984
4429416 Multistage cascade/cascode limiting IF amplifier and meter circuit Jan. 31, 1984
4429283 Differential current amplifier Jan. 31, 1984
4404462 Universal temperature control circuits Sep. 13, 1983
4395681 System for compensating the offset voltage of a differential amplifier Jul. 26, 1983
4378529 Differential amplifier input stage capable of operating in excess of power supply voltage Mar. 29, 1983

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