High efficiency UHF linear power amplifier

Details High efficiency UHF linear power amplifier High efficiency UHF linear power amplifier

1989-02-28

1992-04-14

Mottola, Steven

Amplifiers

Hum or noise or distortion bucking introduced into signal...

332162, 455126, H03F 126, H03C 106

Patent

active

051051648

ABSTRACT:
An RF amplifier for a phase and envelope varying signal employs a class C operated device for high efficiency. In order to improve the linearity of the class C operated device, a signal corresponding to the envelope of the amplifier output is formed and a portion thereof is fed back to an envelope modulation element such as a pulse width modulator connected to the class C operated device to reduce distortion at the amplifier output.

REFERENCES:
patent: 3486128 (1969-12-01), Lohrmann
patent: 3900823 (1975-08-01), Sokal et al.
patent: 4276514 (1981-06-01), Huang
patent: 4574248 (1986-03-01), Snodgrass
patent: 4706262 (1987-11-01), Ohta
patent: 4776036 (1988-10-01), Hulsey et al.

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