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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
6653901 System and method for a startup circuit for a differential CMOS amplifier Nov. 25, 2003
6642791 Self-biased amplifier circuit and method for self-basing amplifier circuit Nov. 4, 2003
6617926 Tail current node equalization for a variable offset amplifier Sep. 9, 2003
6614296 Equalization of a transmission line signal using a variable offset comparator Sep. 2, 2003
6614301 Differential amplifier offset adjustment Sep. 2, 2003
6608525 Operational transconductance amplifier and filter circuit Aug. 19, 2003
6605994 Stabilized high band width differential emitter follower amplifier Aug. 12, 2003
6603355 Active common mode feedback for unbalanced input and feedback signals and methods thereof Aug. 5, 2003
6590980 Low voltage, low power operational amplifier with rail to rail output Jul. 8, 2003
6580324 Apparatus, method and system for common-mode stabilization in circuits having differential operation Jun. 17, 2003
6580326 High-bandwidth low-voltage gain cell and voltage follower having an enhanced transconductance Jun. 17, 2003
6570448 System and method for a startup circuit for a differential CMOS amplifier May. 27, 2003
6559720 GM-controlled current-isolated indirect-feedback instrumentation amplifier May. 6, 2003
6549074 Transconductance amplifier, filter using the transconductance amplifier and tuning circuitry for transconductance amplifier in the filter Apr. 15, 2003
6549070 High gain amplifier with current limited positive feedback Apr. 15, 2003
6542033 Differential amplifier circuit requiring small amount of bias current in a non-signal mode Apr. 1, 2003
6538513 Common mode output current control circuit and method Mar. 25, 2003
6531919 Phase inversion prevention circuit for an operational amplifier input stage Mar. 11, 2003
6509795 CMOS input stage with wide common-mode range Jan. 21, 2003
6492871 Current feedback operational amplifier Dec. 10, 2002
6483383 Current controlled CMOS transconductive amplifier arrangement Nov. 19, 2002
6469578 Differential current mode gain stage and methods of using the same Oct. 22, 2002
6462618 Amplifying circuit with distortionless outputs Oct. 8, 2002
6462600 Read-head preamplifier having internal offset compensation Oct. 8, 2002
6459338 Single loop output common mode feedback circuit for high performance class AB differential amplifier Oct. 1, 2002
6438366 Method and circuit for sampling a signal at high sampling frequency Aug. 20, 2002
6433608 Device and method for correcting the baseline wandering of transmitting signals Aug. 13, 2002
6426663 Analog/digital feedback circuitry for minimizing DC offset variations in an analog signal Jul. 30, 2002
6420932 Variable offset amplifier circuit Jul. 16, 2002
6420931 High swing output circuit having differential to single-ended conversion and method Jul. 16, 2002
6411165 Active common mode feedback for unbalanced input and feedback signals and methods thereof Jun. 25, 2002
6384682 Differential amplifier circuit and pull up-type differential driver May. 7, 2002
6380806 Differential telescopic operational amplifier having switched capacitor common mode feedback circuit portion Apr. 30, 2002
6362687 Apparatus for and method of controlling amplifier output offset using body biasing in MOS transistors Mar. 26, 2002
6313704 Multi-stage signal amplifying circuit Nov. 6, 2001
6304144 Differential amplification circuit Oct. 16, 2001
6292033 Precision, low-power transimpedance circuit with differential current sense inputs and single ended voltage output Sep. 18, 2001
6281751 Frequency compensation for single-ended class AB operational amplifiers with fully-differential input stages Aug. 28, 2001
6265941 Balanced differential amplifier having common mode feedback with kick-start Jul. 24, 2001
6218901 High speed differential output driver with increased voltage swing and predrive common mode adjustment Apr. 17, 2001
6191654 Differential amplifier circuit Feb. 20, 2001
6150876 Voltage bias, current sense preamplifier for a magnetoresistive reader Nov. 21, 2000
6150881 Amplifier circuit with amplitude and phase correction and method of operation Nov. 21, 2000
6140876 Differential amplifier with MOS transistor Oct. 31, 2000
6114909 Differential amplifier for correcting offsets at inputs using low capacitance capacitor Sep. 5, 2000
6111965 Method and apparatus for offset compensation of a signal processing circuit Aug. 29, 2000
6107884 Low-distortion high-efficiency amplifier Aug. 22, 2000
6107867 Load termination sensing circuit Aug. 22, 2000
6046638 Receive amplifier for reception of high-speed data signals Apr. 4, 2000
6023196 Bias circuit for transconductance amplifier Feb. 8, 2000

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