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Class Information
Number: 330/293
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including signal feedback means > Having negative feedback
Description: Subject matter wherein the signal feedback which is superimposed on the input signal has at least one component thereof opposite in phase to the input signal.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8564369 Linear amplifier Oct. 22, 2013
8509629 High sensitivity two-stage amplifier Aug. 13, 2013
8451061 Amplification of an incoming signal received via an antenna May. 28, 2013
8237505 Signal amplification circuit Aug. 7, 2012
8183923 Constant gain amplifier system with gain control feedback May. 22, 2012
8149051 Solid-state image sensor Apr. 3, 2012
8120428 Apparatus and method for low noise amplification Feb. 21, 2012
8004363 Wideband low-noise amplifier Aug. 23, 2011
7969246 Systems and methods for positive and negative feedback of cascode transistors for a power amplifier Jun. 28, 2011
7940120 Power amplifier linearization using RF feedback May. 10, 2011
7898337 High slew rate amplifier, analog-to-digital converter using same, CMOS imager using the analog-to-digital converter and related methods Mar. 1, 2011
7889010 Compensation circuit Feb. 15, 2011
7852158 Operational amplifier Dec. 14, 2010
7714644 Amplifier circuit May. 11, 2010
7692486 Configurable feedback for an amplifier Apr. 6, 2010
7622995 Negative-feedback type ultra-wideband signal amplification circuit Nov. 24, 2009
7567127 Automatic-gain control circuit Jul. 28, 2009
7547889 Photon detection device Jun. 16, 2009
7372327 Input structure for a power amplifier and associated methods May. 13, 2008
7248119 Broadband amplifier with improved noise figure and distortion characteristics Jul. 24, 2007
7230483 Negative feedback system with an error compensation scheme Jun. 12, 2007
7173487 Power amplification circuit and communication device using the same Feb. 6, 2007
7161427 Input structure for a power amplifier and associated methods Jan. 9, 2007
7088175 Low noise, electric field sensor Aug. 8, 2006
7023278 Digital power amplifier level control Apr. 4, 2006
6989716 Variable gain amplifier Jan. 24, 2006
6952131 Digital PWM input D class amplifier by PWM negative feedback Oct. 4, 2005
6873207 Power amplification circuit and communication device using the same Mar. 29, 2005
6853251 Self-adjusting winner lineup amplifier Feb. 8, 2005
6825724 Amplifier and method for processing signals Nov. 30, 2004
6621331 Variable negative resistance cell for bipolar integrated circuits Sep. 16, 2003
6545620 Current-to-voltage converter with controllable gain, and signal processing circuit comprising such a converter Apr. 8, 2003
6369654 Semiconductor device Apr. 9, 2002
6211730 Pre-amplifier circuit Apr. 3, 2001
6128354 Data detection pre-amplifier circuit Oct. 3, 2000
6121818 Mixer using replica voltage-current converter Sep. 19, 2000
6018262 CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter Jan. 25, 2000
5977571 Low loss connecting arrangement for photodiodes Nov. 2, 1999
5963095 Amplifier circuit, a transmitter and a wireless telephone Oct. 5, 1999
5949288 Circuit arrangement with an operational amplifier Sep. 7, 1999
5939945 Amplifier with neuron MOS transistors Aug. 17, 1999
5914639 Amplifier with common base input stage Jun. 22, 1999
5886580 Tuned amplifier Mar. 23, 1999
5872482 Amplifier circuit having a pair of differential transistors with differing threshold values for perform offset compensation Feb. 16, 1999
5854574 Reference buffer with multiple gain stages for large, controlled effective transconductance Dec. 29, 1998
5844445 Feedback type pre-amplifier Dec. 1, 1998
5821813 Bidirectional amplifier Oct. 13, 1998
5805023 High frequency amplifier, receiver, and transmitter system Sep. 8, 1998
5777517 Semiconductor feedback amplifier having improved frequency characteristics Jul. 7, 1998
5769384 Low differential light level photoreceptors Jun. 23, 1998

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