High frequency amplifier circuit

Details High frequency amplifier circuit High frequency amplifier circuit

1998-10-14

2000-08-29

Pascal, Robert

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330127, 330149, H03G 516, H03G 300, H03F 126

Patent

active

061114618

ABSTRACT:
A high frequency amplifier circuit includes the voltage source supplying the power source voltage on the output side of the high frequency amplifying active element. The high frequency amplifier is constructed with a voltage detector detecting a difference frequency voltage of the input signal at a frequency lower than the input signal of the high frequency amplifier circuit and control portion for attenuating the difference frequency voltage from the output signal by controlling the power source voltage on the basis of the difference frequency voltage detected by the voltage detector. Therefore, distortion due to modulating the input signal with the difference frequency component of the input signal can be reduced.

REFERENCES:
patent: 5164680 (1992-11-01), Mahabadi
patent: 5272450 (1993-12-01), Wisherd
N. Matsuno et al, "Intermodulation Distortion Dependence on Bias Circuit Design in Power MOSFETs", Proceedings of the 1997 Japanese IEICE Conference, 1997, p. 78.

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