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Class Information
Number: 330/103
Name: Amplifiers > Signal feedback > Multiple feedback paths
Description: Subject matter including two or more signal feedback circuit means as therein defined and not previously provided for in this schedule.

Sub-classes under this class:

Class Number Class Name Patents
330/104 Positive and negative feedback 43

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8532752 Biosignal amplifying device Sep. 10, 2013
8466742 Large time constant steering circuit and instrumentation amplifier implementing same Jun. 18, 2013
8335478 Communication device Dec. 18, 2012
8232841 Amplifier with output filtering Jul. 31, 2012
7961043 Single-ended amplifier Jun. 14, 2011
7920005 Large time constant steering circuit and instrumentation amplifier implementing same Apr. 5, 2011
7880543 Data transmitting circuit and transmitting method Feb. 1, 2011
7855598 Electronic signal processor Dec. 21, 2010
7825735 Dual-range linearized transimpedance amplifier system Nov. 2, 2010
7683710 Electronic signal processor Mar. 23, 2010
7633338 Compensation circuit for amplifiers having multiple stages Dec. 15, 2009
7512387 Method and control system for controlling the output power of an RF amplifier system Mar. 31, 2009
7403067 Compensation circuit for amplifiers having multiple stages Jul. 22, 2008
7403068 Method for double sampling loop negative feedback and double sampling negative feedback amplifier Jul. 22, 2008
7366427 Line driver with variable bandwidth control Apr. 29, 2008
7279970 Feedback circuit Oct. 9, 2007
7151405 Estimating power amplifier non-linearity in accordance with memory depth Dec. 19, 2006
7061313 Dual feedback linear amplifier Jun. 13, 2006
7053705 Mixed-mode (current-voltage) audio amplifier May. 30, 2006
7012466 Voltage-to-current converter Mar. 14, 2006
7010284 Wireless communications device including power detector circuit coupled to sample signal at interior node of amplifier Mar. 7, 2006
7002409 Compensation circuit for amplifiers having multiple stages Feb. 21, 2006
6946910 Configurable feedback path in an amplitude control system Sep. 20, 2005
6825718 Impedance matching circuit Nov. 30, 2004
6646463 Impedance emulator Nov. 11, 2003
6600367 Low distortion amplifier Jul. 29, 2003
6566947 Combined active impedance and filter in line drivers May. 20, 2003
6392478 Amplification device having an adjustable bandwidth May. 21, 2002
6359505 Complementary pair-configured telecommunication line driver having synthesized output impedance Mar. 19, 2002
6351137 Impedance emulator Feb. 26, 2002
5939951 Methods and apparatus for modulating, demodulating and amplifying Aug. 17, 1999
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
5828264 Two-stage operational amplifier circuit with wide output voltage swings Oct. 27, 1998
5815804 Dual-band filter network Sep. 29, 1998
5719527 Method and apparatus for amplifying, modulating and demodulating Feb. 17, 1998
5705951 Method for correction of error signals in a signal amplification system and an apparatus used for that purpose Jan. 6, 1998
5382919 Wideband constant impedance amplifiers Jan. 17, 1995
5317277 Power amplifying apparatus for supplying A.C. signals having a maximum loop gain at a desired frequency May. 31, 1994
4897610 Negative-feedback amplifier with accurately defined input or output impedance combined with high or low output or input impedance respectively Jan. 30, 1990
4775842 Multi-output feedback amplifier Oct. 4, 1988
4757270 High gain feedback amplifier Jul. 12, 1988
4710727 Nonlinear distortion synthesizer using over-threshold power-function feedback Dec. 1, 1987
4661789 Microwave recursive filter Apr. 28, 1987
4644138 Temperature control system with simplified controller and power supply Feb. 17, 1987
4453132 Active filter Jun. 5, 1984
4441085 Signal amplifying apparatus Apr. 3, 1984
4420723 Phase locked loop amplifier for variable amplitude radio waves Dec. 13, 1983
4406923 Automatic loudness controller Sep. 27, 1983
4358739 Wide-band direct-current coupled transistor amplifier Nov. 9, 1982
4292468 Frequency selection circuit Sep. 29, 1981

1 2

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