Amplitude detecting method, AGC circuit gain controlling...

Details Amplitude detecting method, AGC circuit gain controlling... Amplitude detecting method, AGC circuit gain controlling...

2007-07-10

2007-07-10

Lee, Benny (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

Reexamination Certificate

active

11103586

ABSTRACT:
In an amplitude detecting circuit, a phase shifter, into which an alternating current signal that is outputted from an AGC circuit is inputted, outputs first and second alternating current signals between which there is a phase difference. In addition, full wave rectifying is carried out in a first full wave rectifier on the first alternating current signal that is outputted from the phase shifter and in the same manner full wave rectifying is carried out in a second full wave rectifier on the second alternating current signal. Furthermore, in an averaging circuit, output signals of the first and second full wave rectifiers are averaged so as to generate an amplitude detection signal.

REFERENCES:
patent: 5051614 (1991-09-01), Ohta
patent: 5781588 (1998-07-01), Abe et al.
patent: 6459889 (2002-10-01), Ruelke
patent: 08172330 (1996-07-01), None

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