Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Reexamination Certificate
2006-09-19
2006-09-19
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
C330S289000
Reexamination Certificate
active
07109800
ABSTRACT:
A power amplifier for use in a mobile handset includes an amplifying transistor, a bias circuit including a bias transistor, the bias circuit providing a bias current to bias the amplifying transistor, and a bias current control circuit, responsive to fluctuation in a reference voltage and variation in temperature, for adjusting the bias current to control an operation current of the amplifying transistor.
REFERENCES:
patent: 6424225 (2002-07-01), Choi et al.
patent: 6452454 (2002-09-01), Shapiro et al.
patent: 6515546 (2003-02-01), Liwinski
Noh Youn Sub
Park Chul Soon
Bacon & Thomas PLLC
Flanagan Krista M.
Information and Communications University Educational Foundation
Pascal Robert
LandOfFree
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