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Class Information
Number: 330/273
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including push-pull amplifier > Having particular biasing arrangement
Description: Subject matter with specific details or distinctive characteristics of the biasing means applied to the amplifying device.










Sub-classes under this class:

Class Number Class Name Patents
330/274 To eliminate crossover distortion 36


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8665024 Control of minimum current in output transistors of an amplifier output stage Mar. 4, 2014
8665025 Push-pull amplification systems and methods Mar. 4, 2014
8212619 Split-biased current scalable buffer Jul. 3, 2012
8164386 Methods and apparatus to control rail-to-rail class AB amplifiers Apr. 24, 2012
8139792 Amplifier circuits, methods of starting and stopping amplifier circuits Mar. 20, 2012
7940124 Bi-directional and adjustable current source May. 10, 2011
7667540 Class-AB driver design with improved frequency response Feb. 23, 2010
7629853 Amplifying apparatus and bias stabilization circuit Dec. 8, 2009
7030695 Low threshold voltage circuit employing a high threshold voltage output stage Apr. 18, 2006
7026865 Analogue amplifier with multiplexing capability Apr. 11, 2006
7012467 Apparatus and method for compensating operating current in an amplifier when supply voltage varies Mar. 14, 2006
6897729 Self-calibrating gain control circuit for low noise amplifier May. 24, 2005
6842525 Signal amplification circuit and process for neutralizing noise from a power supply voltage Jan. 11, 2005
6784738 Method and apparatus for gain control in a CMOS low noise amplifier Aug. 31, 2004
6630865 Push-pull amplifiers Oct. 7, 2003
6600371 Low noise amplifier Jul. 29, 2003
6556084 Linearized class C amplifier with dynamic biasing Apr. 29, 2003
6445244 Current measuring methods Sep. 3, 2002
6417733 High output voltage swing class AB operational amplifier output stage Jul. 9, 2002
6369653 Apparatus and methods for improved control of quiescent state of output transistors in a class AB amplifier Apr. 9, 2002
6300837 Dynamic bias boosting circuit for a power amplifier Oct. 9, 2001
6294945 System and method for compensating the dielectric absorption of a capacitor using the dielectric absorption of another capacitor Sep. 25, 2001
6292057 Output stage of an operational amplifier and method having a latchup-free sourcing current booster for driving low impedance loads Sep. 18, 2001
6275108 Circuit and method for control of amplifier operating angle Aug. 14, 2001
6268771 Amplifying device Jul. 31, 2001
6222417 Amplifier output stage provided with a parasitic-current limiter Apr. 24, 2001
6215356 Power amplifier arrangement Apr. 10, 2001
6160441 Sensors for measuring current passing through a load Dec. 12, 2000
5963093 Class AB output stage wih reduced distortion Oct. 5, 1999
5952881 Power stage, particularly for an operational amplifier Sep. 14, 1999
5913181 Circuit for providing a switch signal to trigger changer in a digital potentiometer Jun. 15, 1999
5889433 Amplifier having a high current efficiency Mar. 30, 1999
5874858 Amplifier system having a constant current regulating unit Feb. 23, 1999
5834977 Amplifying circuit with power supply switching circuit Nov. 10, 1998
5764464 Low input bias current circuit Jun. 9, 1998
5764105 Push-pull output circuit method Jun. 9, 1998
5708393 High voltage operational amplifier output stage Jan. 13, 1998
5684432 Amplifier output stage having enhanced drive capability Nov. 4, 1997
5508658 Power amplifier circuit for audio signal and audio device using the same Apr. 16, 1996
5500625 Controlled current output stage amplifier circuit and method Mar. 19, 1996
5483197 Power amplifier circuit for audio signal and audio device using the same Jan. 9, 1996
5479134 Power amplifier circuit for audio signal and audio device using the same Dec. 26, 1995
5450036 Power amplifier circuit for audio signal and audio device using the same Sep. 12, 1995
5424684 Power amplifier circuit for audio signal and audio device using the same Jun. 13, 1995
5389894 Power amplifier having high output voltage swing and high output drive current Feb. 14, 1995
5357213 High-frequency wide band amplifier having reduced impedance Oct. 18, 1994
5285170 Operational amplifier with all NPN transistor output stage Feb. 8, 1994
5166636 Dynamic biasing for class A amplifier Nov. 24, 1992
5081426 Power amplifier having a standby circuit Jan. 14, 1992
5059923 Fractional load current detector Oct. 22, 1991

1 2 3










 
 
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