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Class Information
Number: 330/290
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including d.c. feedback bias control for stabilization
Description: Subject matter with feedback circuit for direct currents, for the purpose of operating point stabilization as compensating for changes in temperature, aging, etc., of the semiconductor device, or devices, which may include means such as bypass capacitors to eliminate signal feedback.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8558621 Driver amplifier circuit and communication system Oct. 15, 2013
8552803 Amplifier with dynamic bias Oct. 8, 2013
8503960 Amplifier and associated receiver Aug. 6, 2013
8390491 Buffer to drive reference voltage Mar. 5, 2013
8390742 Semiconductor integrated circuit and video signal output circuit Mar. 5, 2013
8326371 DC current based on chip RF power detection scheme for a power amplifier Dec. 4, 2012
8111104 Biasing methods and devices for power amplifiers Feb. 7, 2012
8063706 Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages Nov. 22, 2011
8058929 Maintaining loop linearity in presence of threshold adjustment Nov. 15, 2011
8004363 Wideband low-noise amplifier Aug. 23, 2011
7982542 Power transistor feedback circuit with noise and offset compensation Jul. 19, 2011
7944307 Wideband RF amplifiers May. 17, 2011
7915958 Amplifier Mar. 29, 2011
7898336 Ground skimming output stage Mar. 1, 2011
7825734 Amplifier having an output protection, in particular operational amplifier for audio application Nov. 2, 2010
7786807 Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages Aug. 31, 2010
7772927 Active bias Darlington amplifier Aug. 10, 2010
7746171 Amplifier networks with controlled common-mode level and converter systems for use therewith Jun. 29, 2010
7737753 Method and device for adjusting or setting an electronic device Jun. 15, 2010
7728671 Semiconductor power device with bias circuit Jun. 1, 2010
7679450 Amplifier auto biasing Mar. 16, 2010
7675364 Circuit and method of establishing DC bias levels in an RF power amplifier Mar. 9, 2010
7663442 Data receiver including a transconductance amplifier Feb. 16, 2010
7639084 Power amplifier with nonlinear compensation, and method thereof Dec. 29, 2009
7634096 Amplifier circuit for capacitive transducers Dec. 15, 2009
7622994 Bias circuit with increased power supply rejection Nov. 24, 2009
7564308 Self-biased operational amplifier Jul. 21, 2009
7515000 Active bias circuit for low-noise amplifiers Apr. 7, 2009
7486143 Circuit for biasing a transistor and related system and method Feb. 3, 2009
7459978 Ground skimming output stage Dec. 2, 2008
7446612 Amplifier feedback and bias configuration Nov. 4, 2008
7425871 Compensation units for reducing the effects of self-heating and increasing linear performance in bipolar transistors Sep. 16, 2008
7405623 Sensing circuit Jul. 29, 2008
7391264 Amplifier Jun. 24, 2008
7330075 Output impedance control circuit and control method thereof Feb. 12, 2008
7304540 Source follower and current feedback circuit thereof Dec. 4, 2007
7262665 Active bias circuit for low-noise amplifiers Aug. 28, 2007
7233199 Circuit and method of establishing DC bias levels in an RF power amplifier Jun. 19, 2007
7224230 Bias circuit with mode control and compensation for voltage and temperature May. 29, 2007
7218175 Dynamic feedback linearization May. 15, 2007
7202743 High frequency amplifier Apr. 10, 2007
7113043 Active bias circuit for low-noise amplifiers Sep. 26, 2006
7078967 Control of bias voltage Jul. 18, 2006
7061321 Low impedance read amplifier for magnetoresistive head Jun. 13, 2006
7058360 Method and system for stabilizing the performance variation of a radio frequency device Jun. 6, 2006
7049893 Apparatus, methods and articles of manufacture for power amplifier control in a communication system May. 23, 2006
7039124 Apparatus and method for compensating for analog quadrature modulation error May. 2, 2006
6933785 Common mode bias control loop for output stages Aug. 23, 2005
6825725 Integrated power amplifier circuit Nov. 30, 2004
6778019 Method and device for biasing a transistor of a radio frequency amplifier stage Aug. 17, 2004

1 2 3 4

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