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Class Information
Number: 330/104
Name: Amplifiers > Signal feedback > Multiple feedback paths > Positive and negative feedback
Description: Subject matter including at least one signal feedback means having a component of the signal feedback in phase with the signal at the point in the circuit where the signal is applied and at least one signal feedback circuit means having a signal feedback component which is in phase opposition with the signal.










Patents under this class:

Patent Number Title Of Patent Date Issued
8604873 Ground partitioned power amplifier for stable operation Dec. 10, 2013
8558288 Methods and apparatus for measuring analytes using large scale FET arrays Oct. 15, 2013
8497739 Single-differential converting circuit Jul. 30, 2013
8476981 Unbalanced/balanced conversion differential amplifier Jul. 2, 2013
8446217 Dual-loop feedback amplifying circuit May. 21, 2013
8344920 Methods and apparatus for calibrating pipeline analog-to-digital converters Jan. 1, 2013
8093944 Line driver capable of automatic adjustment of output impedance Jan. 10, 2012
7724104 Constant gain amplifier system with positive and negative feedback May. 25, 2010
7701284 Line driver capable of automatically adjusting output impedance Apr. 20, 2010
7683715 Feedback biasing technique for a stage of an amplifier that uses a feedback control loop having low gain Mar. 23, 2010
7605650 Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy Oct. 20, 2009
7459971 Amplifier circuit Dec. 2, 2008
7459980 Apparatus for receiver equalization Dec. 2, 2008
7365597 Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy Apr. 29, 2008
7265624 Amplifier circuit Sep. 4, 2007
7012466 Voltage-to-current converter Mar. 14, 2006
6985053 Negative resistance circuit Jan. 10, 2006
6967530 Circuit and semiconductor device for reducing the generation of shock noise of a power amplifier outputting amplified audio signals Nov. 22, 2005
6954123 Tuning circuit Oct. 11, 2005
6920336 Broadband driver Jul. 19, 2005
6870447 Tuning circuit Mar. 22, 2005
6822510 Power-off, loop-through return-loss with negative capacitance Nov. 23, 2004
6600367 Low distortion amplifier Jul. 29, 2003
6600366 Differential line driver circuit Jul. 29, 2003
5856758 Low distortion driver employing positive feedback for reducing power loss in output impedance that effectively matches the impedance of driven line Jan. 5, 1999
5684433 Dual-feedback amplifier circuit arrangements Nov. 4, 1997
5398004 HBT direct-coupled low noise wideband microwave amplifier Mar. 14, 1995
5384530 Bootstrap voltage reference circuit utilizing an N-type negative resistance device Jan. 24, 1995
5374966 Low noise impedance-matched video amplifier Dec. 20, 1994
5157347 Switching bridge amplifier Oct. 20, 1992
4916409 Signal conditioner system for musical instruments Apr. 10, 1990
4858094 Switched mode power supply with improved load regulation Aug. 15, 1989
4706281 Dynamic impedance element for a battery feed circuit Nov. 10, 1987
4684886 Automatic equalizer Aug. 4, 1987
4630046 Broadband switching network in matrix form Dec. 16, 1986
4397368 Driving circuits of solenoid actuated devices Aug. 9, 1983
4302726 Current sources Nov. 24, 1981
4125813 Operational amplifier decoupling circuit Nov. 14, 1978
4110677 Operational amplifier with positive and negative feedback paths for supplying constant current to a bandgap voltage reference circuit Aug. 29, 1978
4091333 Transconductance amplifier circuit May. 23, 1978
4088961 Operational amplifier driver circuit May. 9, 1978
4085379 Amplifier for floating voltage source Apr. 18, 1978
4079331 Amplifier system with special feedback circuits Mar. 14, 1978











 
 
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