Bias circuit for power amplifier operated as a digital to analog converter
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United States of America Patent
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Issued Date -
Oct 13, 2005
app pub date -
Apr 8, 2004
filing date -
Apr 8, 2004
priority date (Note) -
Abandoned
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Abstract
An apparatus and method for biasing a power amplifier circuit operating as a Digital to Analog Converter (DAC) are described. The bias circuit comprises a first transistor with a reference voltage coupled to its base terminal, a second transistor coupled to the emitter terminal of the first transistor at its collector terminal, and a third transistor with its base terminal coupled to the first and second transistors, and to an input signal.
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