Dual (constant voltage/constant current) bias supply for...

Details Dual (constant voltage/constant current) bias supply for... Dual (constant voltage/constant current) bias supply for...

2005-07-26

2005-07-26

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

C330S285000, C330S288000, C330S289000

Reexamination Certificate

active

06922107

ABSTRACT:
An RF amplifier comprises a power amplifier and a dual bias circuit. A dual bias circuit comprises a constant current source and a constant voltage source for biasing the power amplifier. The power may include a heterojunction bipolar transistor (HBT) or a bipolar junction transistor (BJT).

REFERENCES:
patent: 6404287 (2002-06-01), Dening et al.
patent: 6617928 (2003-09-01), Finlay et al.
patent: 6771129 (2004-08-01), Riishøj et al.
patent: 6784748 (2004-08-01), Canyon et al.
patent: 6803821 (2004-10-01), DeFalco et al.
patent: 6842075 (2005-01-01), Johnson et al.

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