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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5343165 |
Amplifier having a symmetrical output characteristic |
Aug. 30, 1994 |
| 5334950 |
Class-AB push-pull drive circuit |
Aug. 2, 1994 |
| 5315267 |
Composite differential direct-coupled instrumentation amplifier |
May. 24, 1994 |
| 5309042 |
Full swing BiCMOS amplifier |
May. 3, 1994 |
| 5222016 |
Frequency converter |
Jun. 22, 1993 |
| 5142245 |
Power amplifier for rectangular input signals |
Aug. 25, 1992 |
| 5087890 |
Amplifier circuit |
Feb. 11, 1992 |
| 5070308 |
Working point adjusting circuit for a power amplifier |
Dec. 3, 1991 |
| 5021746 |
Amplifier output stage |
Jun. 4, 1991 |
| 4940949 |
High efficiency high isolation amplifier |
Jul. 10, 1990 |
| 4782306 |
Power amplifier |
Nov. 1, 1988 |
| 4749958 |
Operational amplifier |
Jun. 7, 1988 |
| 4688000 |
Non biased push-pull amplifiers |
Aug. 18, 1987 |
| 4647866 |
Audio amplifier output stage |
Mar. 3, 1987 |
| 4609879 |
Circuitry for a selective push-pull amplifier |
Sep. 2, 1986 |
| 4598255 |
Power amplifier apparatus |
Jul. 1, 1986 |
| 4509018 |
Asymmetric superconducting quantum interference device in a linear amplifier circuit |
Apr. 2, 1985 |
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