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Class Information
Number: 330/262
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including push-pull amplifier
Description: Subject matter including at least one push-pull amplifier.










Sub-classes under this class:

Class Number Class Name Patents
330/275 Having balanced to unbalanced circuitry and vice versa 46
330/263 Having complementary symmetry 187
330/270 Having d.c. feedback bias control for stabilization 44
330/269 Having field effect transistor 116
330/273 Having particular biasing arrangement 108
330/271 Having signal feedback means 65
330/272 Having temperature compensating means 33
330/276 Having transformer 112


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8629727 Techniques on input transformer to push the OP1dB higher in power amplifier design Jan. 14, 2014
8564370 Error amplifier and LED circuit comprising the same Oct. 22, 2013
8476971 Buffer operational amplifier with self-offset compensator and embedded segmented DAC for improved linearity LCD driver Jul. 2, 2013
8446228 Oscillator circuit May. 21, 2013
8022776 Origami cascaded topology for analog and mixed-signal applications Sep. 20, 2011
7920027 Amplifier design with biasing and power control aspects Apr. 5, 2011
7889003 Class-D amplifier Feb. 15, 2011
7876162 Amplifier and radio Jan. 25, 2011
7821304 Semiconductor device having input circuit minimizing influence of variations in input signals Oct. 26, 2010
7812667 System and method of enabling a signal processing device in a relatively fast manner to process a low duty cycle signal Oct. 12, 2010
7804357 Distributed amplifier Sep. 28, 2010
7719356 Pulse amplifier May. 18, 2010
7705675 Distributed multi-stage amplifier Apr. 27, 2010
7602248 Power amplifier and its idling current setting circuit Oct. 13, 2009
7567784 Tuner, broadcast signal processing apparatus comprising the same, and broadcast signal processing method Jul. 28, 2009
7528651 Noise free implementation of PWM modulator combined with gate driver stage in a single die May. 5, 2009
7477104 Power amplifier circuit and test apparatus Jan. 13, 2009
7449951 Low voltage operational amplifier Nov. 11, 2008
7425869 Distributed circular geometry power amplifier architecture Sep. 16, 2008
7321752 Linear amplification arrangement with non-linear amplifier element for a mobile radio device Jan. 22, 2008
7145392 Methods and apparatus for variable harmonic distortion Dec. 5, 2006
7142017 High-voltage-tolerant feedback coupled I/O buffer Nov. 28, 2006
7075371 Distributed circular geometry power amplifier architecture Jul. 11, 2006
7034616 Operational amplification circuit, overheat detecting circuit and comparison circuit Apr. 25, 2006
7015756 Push-pull buffer/amplifier Mar. 21, 2006
7015750 Method for lowering noise and providing offset correction in a transimpedance amplifier Mar. 21, 2006
6838940 High frequency power amplifier circuit Jan. 4, 2005
6816012 Distributed circular geometry power amplifier architecture Nov. 9, 2004
6792121 Audio signal amplifier circuit and portable telephone set and portable electronic device using the same audio signal amplifier circuit Sep. 14, 2004
6765438 Transconductance power amplifier Jul. 20, 2004
6731170 Source drive amplifier of a liquid crystal display May. 4, 2004
6714076 Buffer circuit for op amp output stage Mar. 30, 2004
6630865 Push-pull amplifiers Oct. 7, 2003
6608905 Microphone bias current measurement circuit Aug. 19, 2003
6489839 Amplifier with output transformer Dec. 3, 2002
6473009 PWM power amplifier Oct. 29, 2002
6420914 Charge pump circuit having switching circuits for reducing leakage currents Jul. 16, 2002
6374043 Fully-integrated VCM driver with controlled and predictable Class-AB linear operation Apr. 16, 2002
6222417 Amplifier output stage provided with a parasitic-current limiter Apr. 24, 2001
6150853 Integrated unit gain output stage Nov. 21, 2000
6072341 Driver circuit with pull down npn transistor and gain reduction Jun. 6, 2000
6069959 Active headset May. 30, 2000
6011438 Push-pull wideband semiconductor amplifier Jan. 4, 2000
5963093 Class AB output stage wih reduced distortion Oct. 5, 1999
5874858 Amplifier system having a constant current regulating unit Feb. 23, 1999
5805713 Solid state circuit for emulating push-pull tube amplifier Sep. 8, 1998
5764105 Push-pull output circuit method Jun. 9, 1998
5552741 High impedance common-emitter amplifier stage Sep. 3, 1996
5396193 Frequency response-compensated circuit Mar. 7, 1995
5359295 Power amplifier Oct. 25, 1994

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