AGC circuit, AGC circuit gain control method, and program...

Details AGC circuit, AGC circuit gain control method, and program... AGC circuit, AGC circuit gain control method, and program...

2007-06-19

2007-06-19

Mottola, Steven J. (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S281000

Reexamination Certificate

active

11057232

ABSTRACT:
The present invention relates to an AGC circuit, a AGC circuit gain control method, and a program for the AGC circuit gain control method, and may be applied to IC recorders, for example, as a portable recording/reproducing device, in order to ameliorate problems of listening to talk, music and the like during playback from IC recorders. In the invention, a signal level L1cyc is detected in units of the period of an input signal, and a recovery time constant r is switched on the basis of a decision as to the signal level L1cyc based on an average shift Lavg of the signal level L1cyc.

REFERENCES:
patent: 5255325 (1993-10-01), Ishimitsu et al.
patent: 6731768 (2004-05-01), Delage
patent: 2-192209 (1990-07-01), None
patent: 4-113710 (1992-04-01), None
patent: 5-189007 (1993-07-01), None
patent: 10-163775 (1998-06-01), None
patent: 2000-151442 (2000-05-01), None

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