Gate voltage control circuit of a power amplifier

Details Gate voltage control circuit of a power amplifier Gate voltage control circuit of a power amplifier

1997-08-11

1999-06-22

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330285, H03F 3191, H03G 330

Patent

active

059146419

ABSTRACT:
A gate voltage control circuit of a power amplifier for reducing the power dissipation by improving the efficiency at an average output power and for enhancing the linearity of the power amplifier at a maximum output power, the gate voltage control circuit comprising an input terminal for receiving an output power signal from a power amplifier; an output power detecting circuit for detecting the output power signal and for converting the detected output power signal to a DC voltage signal; a voltage dividing circuit comprising at least two resistors for dividing a voltage difference between the DC voltage signal and a negative voltage in a ratio of resistances of the resistors; and an output terminal for supplying the divided voltage as a gate voltage control signal.

REFERENCES:
patent: 5051706 (1991-09-01), Zushi
patent: 5250912 (1993-10-01), Fujita
patent: 5455968 (1995-10-01), Pham
patent: 5532646 (1996-07-01), Aihara

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