High frequency power amplifier circuit and electronic...

Details High frequency power amplifier circuit and electronic... High frequency power amplifier circuit and electronic...

2007-12-04

2007-12-04

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S288000, C330S296000

Reexamination Certificate

active

10960097

ABSTRACT:
In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the scattering of the threshold voltage Vth and a channel length modulation coefficient λ due to a short channel effect are corrected automatically. The scattering of a high frequency power amplifying characteristic can be reduced as a result.

REFERENCES:
patent: 4055812 (1977-10-01), Rosenthal
patent: 4879524 (1989-11-01), Bell
patent: 5689211 (1997-11-01), Embree
patent: 6556081 (2003-04-01), Muza
patent: 2005/0030097 (2005-02-01), Ivanov et al.
patent: 2005/0285676 (2005-12-01), Jones
patent: 2003-17954 (2003-01-01), None
patent: 2004-193846 (2004-07-01), None

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