Automatic output power controller

Details Automatic output power controller Automatic output power controller

1991-04-18

1993-05-18

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

With variation of antenna impedance or dimension for modulation

455126, 330127, 330149, H04B 102, H04B 104, H03G 300

Patent

active

052128148

ABSTRACT:
An automatic output power controller controls signals output by an amplifier amplifying a modulated wave with its envelope varying due to the modulation so that the mean power becomes constant. An equi-output point extraction circuit extracts timing of the output power of the amplifier becoming a constant value from a base band signal or the like, and supplies the timing to a sample-and-hold circuit. The sample-and-hold circuit samples and holds the output power. Difference between the sample-and-hold value and the reference value is supplied to an output power adjusting circuit, and the output power adjusting circuit controls signals output by the amplifier in accordance with the difference so that the mean power becomes constant.

REFERENCES:
patent: 4412337 (1983-10-01), Bickley et al.
patent: 4700151 (1987-10-01), Nagata
patent: 4760587 (1988-07-01), Ehlinger et al.
patent: 4811421 (1989-03-01), Havel et al.
patent: 5054116 (1991-10-01), Davidson
patent: 5125100 (1992-06-01), Katznelson

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