Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate
2006-03-15
2009-11-17
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
C330S264000, C330S266000
Reexamination Certificate
active
07619476
ABSTRACT:
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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Cirrus Logic Inc.
Hayes & Soloway P.C.
Nguyen Khanh V
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