Power amplifier capable of adjusting operating point

Details Power amplifier capable of adjusting operating point Power amplifier capable of adjusting operating point

2005-01-04

2005-01-04

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S285000

Reexamination Certificate

active

06838932

ABSTRACT:
The present invention includes a power amplifying stage having a power amplifying element having a main electrode and a control electrode, and a bias control circuit that is supplied with a bias switching voltage and an operating point adjusting voltage for adjusting the bias voltage value to the control electrode of the power amplifying element by the bias switching voltage and the operating point adjusting voltage and hence adjusting the operating point of the power amplifying element, wherein the bias control circuit adjusts the operating point of the power amplifying element by switching between supply and stop of the bias voltage to the control electrode of the power amplifying element by the bias switching voltage, and varying the bias voltage value to be supplied to the control electrode of the power amplifying element by the operating point adjusting voltage in phase.

REFERENCES:
patent: 5060294 (1991-10-01), Schwent et al.
patent: 6218906 (2001-04-01), Lohninger
patent: 6297694 (2001-10-01), Yamamoto
patent: 6300837 (2001-10-01), Sowlati et al.
patent: 6501331 (2002-12-01), Adar
patent: 20010011926 (2001-08-01), Adar
patent: H05-175757 (1993-07-01), None

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