RF Power amplifier for use with VHF transceivers

Details RF Power amplifier for use with VHF transceivers RF Power amplifier for use with VHF transceivers

1984-05-07

1986-03-04

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

330134, 330135, 330136, 330279, 455115, 455246, H03G 320, G01R 2100

Patent

active

045742480

ABSTRACT:
An improved power amplifier is disclosed which is particularly useful with very high frequency (VHF) transceivers. The power amplifier includes a control loop configured to sense the input radio frequency signal and use that signal as a reference for comparison with the radio frequency output from the amplifier to control amplifier power output. The loop forces the amplifier's output radio frequency envelope to follow the input radio frequency envelope and thus produce a constant gain loop. A limiter in the loop forces the loop to produce a constant power output when the input signal exceeds a level set by the limiter.

REFERENCES:
patent: 3486128 (1969-12-01), Lohrmann
patent: 3900823 (1975-08-01), Sokal et al.
patent: 4476437 (1984-10-01), Fujiwara

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