Automatic gain control apparatus

Details Automatic gain control apparatus Automatic gain control apparatus

1991-12-18

1992-11-24

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4436, G11B 700

Patent

active

051669161

ABSTRACT:
A playback signal from an optical disk includes a track cross component which is produced when a head traverses tracks on the disk and a recorded area component the level of which is reduced in comparison with that of an area on which no data is recorded. A control signal is generated which includes the recorded area component but not the track cross component. A gain of a tracking servo control is controlled by the control signal.

REFERENCES:
patent: Re31160 (1983-03-01), Kinjo
patent: 4475182 (1984-10-01), Hosaka
patent: 4551273 (1990-08-01), Yoshida et al.
patent: 4722079 (1988-01-01), Matsumoto
patent: 4747089 (1988-05-01), Eguchi et al.
patent: 4769801 (1988-09-01), Funada et al.
patent: 4807207 (1989-03-01), Konno

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