Biasing stage for an amplifier

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7619476
APP PUB NO 20060208800A1
SERIAL NO

11378029

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Abstract

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An amplifier biasing stage includes a transistor that provides a biasing signal for a complementary pair of field-effect transistors included in an output stage of an amplifier. The amplifier biasing stage also includes one resistive element connected to an emitter of the transistor, another resistive element connected to a base of the transistor, and still another resistive element connected to a collector of the transistor. The respective resistances of the resistive elements are selected to substantially match a voltage provided by the amplifier biasing stage to a gate-to-source voltage of the complementary pair of field-effect transistors. The resistances of the resistive elements are also selected to substantially match a temperature coefficient of the amplifier biasing stage to a temperature coefficient of the complimentary pair of field-effect transistors.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
APEX MICROTECHNOLOGY, INC.SCOTTSDALE, AZ8

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harman, Jefferson H Tucson , US 9 91

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
* 4638260 Audio amplifier 24 1984
* 6414549 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops 14 2001
* 6646508 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops 18 2002
 
VENTURE LENDING & LEASING II, INC. (1)
* 6268770 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops 8 1999
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
* 6154094 High power output stage with temperature stable precisely controlled quiescent current and inherent short circuit protection 16 1999
 
MONTEREY RESEARCH, LLC (1)
* 6781417 Buffer driver circuit for producing a fast, stable, and accurate reference voltage 4 2002
 
ELANTEC, INC. (1)
* 5475343 Class AB complementary output stage 23 1994
 
STMICROELECTRONICS SA (1)
* 6784739 Class AB amplifier circuit 7 2002
 
TEAC CORPORATION (1)
* 6424220 Single-ended push-pull amplifier circuit 1 2001
 
MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC. (1)
* 6194968 Temperature and process compensating circuit and controller for an RF power amplifier 135 1999
 
Barbetta; Anthony T. (2)
* 5815040 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops 18 1996
* 6144256 Wide bandwidth, current sharing, Mosfet audio power amplifier with multiple feedback loops 7 1998
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 2012/0038,419 MITIGATING SIDE EFFECTS OF IMPEDANCE TRANSFORMATION CIRCUITS 0 2011
 
INFINEON TECHNOLOGIES AG (2)
* 8067958 Mitigating side effects of impedance transformation circuits 14 2010
* 8513973 Mitigating side effects of impedance transformation circuits 0 2011
* Cited By Examiner

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