Power amplifier and wireless communication device

Details Power amplifier and wireless communication device Power amplifier and wireless communication device

2006-09-07

2008-08-05

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S310000

Reexamination Certificate

active

07408412

ABSTRACT:
There are provided a power amplifying transistor, a bias circuit which supplies a bias current to the base of the power amplifying transistor, a current mirror circuit which detects a peak value of the collector voltage of the power amplifying transistor, and a control circuit which, when the peak value of the collector voltage becomes higher than a voltage set in advance, controls the bias circuit to increase the bias current.

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patent: 2004-72250 (2004-03-01), None
patent: 2004-343244 (2004-12-01), None

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