Tracking servo apparatus of disk player

Details Tracking servo apparatus of disk player Tracking servo apparatus of disk player

1989-06-08

1991-06-18

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4413, G11B 709

Patent

active

050254340

ABSTRACT:
There is provided a tracking servo apparatus of a disk player comprising: off-track detecting means for detecting that an information reading spot of a pickup does not exist on an information recording track of a disk and for generating an off-track signal; and level control means for increasing an amplitude of a tracking error signal when the off-track signal exists, whereby the stable tracking servo operation can be executed.

REFERENCES:
patent: 4674076 (1987-06-01), Hsieh et al.
patent: 4707817 (1987-11-01), Yoshio
patent: 4748610 (1988-05-01), Nakata et al.
patent: 4890273 (1989-12-01), Takeuchi et al.
patent: 4914645 (1990-04-01), Getrever et al.
patent: 4932013 (1990-06-01), Kojima et al.

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