Automatic gain control circuit and signal reproducing device

Details Automatic gain control circuit and signal reproducing device Automatic gain control circuit and signal reproducing device

2011-02-22

2011-02-22

Chow, Lixi (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044360

Reexamination Certificate

active

07894312

ABSTRACT:
In a signal reproducing device, for securing the stability in the steady state while enhancing the response of automatic gain control, a variable gain amplifier109adjusts the amplitude of a reproduction signal outputted from a head amplifier108. A gain control section112increases/decreases the gain in the variable gain amplifier109by a predetermined change amount according to the large-small relationship of the comparison result outputted from a comparator111. The gain change amount control circuit113controls the change amount of the gain in the gain control section112according to the frequency of inversion of the large-small relationship of the comparison result outputted from the comparator111.

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Japanese Notice of Reasons for Rejection, w/ English translation thereof, issued in Japanese Patent Application No. JP 2007-514736 dated Jan. 5, 2010.

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