High frequency power amplifier circuit and electronic...

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

2007-10-26

2008-10-28

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S310000, C330S134000, C330S311000

Reexamination Certificate

active

07443245

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.

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