Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Reexamination Certificate
2006-12-11
2009-12-29
Shingleton, Michael B (Department: 2815)
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
C330S290000
Reexamination Certificate
active
07639084
ABSTRACT:
A power amplifier amplifying an input signal is provided, comprising a power amplifier circuit, a bias circuit, and a compensation circuit. The power amplifier circuit has an input impedance responsive to the input signal, and amplifies the input signal to generate an output signal. The bias circuit is coupled to the power amplifier circuit, generates a DC bias signal to the power amplifier so that the power amplifier amplifies the input signal. The compensation circuit is coupled to the power amplifier circuit, provides a compensation impedance responsive to the input signal such that a combination of the input impedance and the compensation impedance is substantially constant regardless of the input signal.
REFERENCES:
patent: 6417735 (2002-07-01), Luo
patent: 6529080 (2003-03-01), Seymour et al.
patent: 6774724 (2004-08-01), Krvavac
patent: 1613178 (2005-05-01), None
CN Office Action mailed Sep. 26, 2008.
Liao Che-Hung
Liu Jung-Chang
Shih Did-Min
Tseng Ying-Che
Shingleton Michael B
Thomas Kayden Horstemeyer & Risley
Via Technologies Inc.
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