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Class Information
Number: 330/268
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including push-pull amplifier > Having complementary symmetry > And particular biasing arrangement > To eliminate crossover distortion
Description: Subject matter wherein distortion which occurs at the points of operation where the input signals cross over the zero reference points is eliminated.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8478210 Apparatus and method of digital predistortion for power amplifiers with dynamic nonlinearities Jul. 2, 2013
7944301 Method and apparatus for an amplifier May. 17, 2011
7786804 Driving amplifier circuit with digital control and DC offset equalization Aug. 31, 2010
7629849 Driving amplifier circuit with digital control Dec. 8, 2009
7535973 Correction method and correction loop for a complex digital signal May. 19, 2009
7486936 Over-current protection in linear regulators Feb. 3, 2009
7382174 A-AB transconductor Jun. 3, 2008
7368992 Load-invariant amplifier May. 6, 2008
6903610 Operational amplifying circuit and push-pull circuit Jun. 7, 2005
6794943 Ultra linear high speed operational amplifier output stage Sep. 21, 2004
6784738 Method and apparatus for gain control in a CMOS low noise amplifier Aug. 31, 2004
6636117 Input/output buffer incorporating filter for powerline communications line Oct. 21, 2003
6535064 Current-feedback amplifier exhibiting reduced distortion Mar. 18, 2003
6535063 Drive method for a cross-connected class AB output stage with shared base current in pre-driver Mar. 18, 2003
6529078 Low-distortion transimpedance amplifier structures and methods Mar. 4, 2003
6501334 Actively biased class AB output stage with low quiescent power, high output current drive and wide output voltage swing Dec. 31, 2002
6452451 Method for adjusting a bipolar output stage for improved frequency response Sep. 17, 2002
6429744 Method for bias rail buffering Aug. 6, 2002
6411145 Feedback control of clock duty cycle Jun. 25, 2002
6384684 Amplifier May. 7, 2002
6369653 Apparatus and methods for improved control of quiescent state of output transistors in a class AB amplifier Apr. 9, 2002
6353363 Low voltage rail-to-rail CMOS output stage Mar. 5, 2002
6297699 Bias rail buffer circuit and method Oct. 2, 2001
6294958 Apparatus and method for a class AB output stage having a stable quiescent current and improved cross over behavior Sep. 25, 2001
6262633 High output current operational amplifier output stage Jul. 17, 2001
6184750 Control circuit driven by a differential input voltage and method for controlling same Feb. 6, 2001
6175277 Bias network for CMOS power devices Jan. 16, 2001
6100763 Circuit for RF buffer and method of operation Aug. 8, 2000
6078220 Complementary class AB current amplifier Jun. 20, 2000
5973563 High power output stage with temperature stable precisely controlled quiescent current and inherent short circuit protection Oct. 26, 1999
5963065 Low offset push-pull amplifier Oct. 5, 1999
5955924 Differential metal-oxide semiconductor (CMOS) push-pull buffer Sep. 21, 1999
5955923 Amplifier with reduced cross-over distortion Sep. 21, 1999
5892399 Current boost circuit for reducing crossover distortion in an operational amplifier Apr. 6, 1999
5869989 Amplifying electronic circuit with stable idling current Feb. 9, 1999
5754078 Operational amplifier for class B amplification May. 19, 1998
5673000 Dynamically invariant AB linear operation amplifier Sep. 30, 1997
5513389 Push pull buffer with noise cancelling symmetry Apr. 30, 1996
5452208 Display device Sep. 19, 1995
5229721 Micropower amplifier/transducer driver with signal expansion Jul. 20, 1993
5162752 Working point adjusting circuit for a single power amplifier having multiple output channels Nov. 10, 1992
5148116 Enhanced vacuum tube power amplifier Sep. 15, 1992
5146181 BiCMOS output stage with improved output voltage signal Sep. 8, 1992
5070308 Working point adjusting circuit for a power amplifier Dec. 3, 1991
5061902 Linear amplifier Oct. 29, 1991
5057790 High efficiency class A amplifier Oct. 15, 1991
5055797 Bias control for power amplifiers Oct. 8, 1991
5049834 Amplifier having a constant-current bias circuit Sep. 17, 1991
4959623 Low impedance buffer circuit Sep. 25, 1990
4893091 Complementary current mirror for correcting input offset voltage of diamond follower, especially as input stage for wide-band amplifier Jan. 9, 1990

1 2 3

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