Title: AGC circuit and gain control method, and program
Application Number: 200510052148 Application Date: 2005.02.25
Publication Number: 1661909 Publication Date: 2005.08.31
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03G3/20,H03G3/30,H04B1/16
Applicant(s) Name: Sony Corp. Address:
Inventor(s) Name:
Attorney & Agent: li deshan
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 L 1 cyc 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 L 1 cyc based on an average shift Lavg of the signal level L 1 cyc.
Time: 10