Track servo control system for optical disk apparatus

Details Track servo control system for optical disk apparatus Track servo control system for optical disk apparatus

1988-08-26

1990-12-04

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 700

Patent

active

049758950

ABSTRACT:
A track servo control system provided in an optical disk apparatus, having a low servo gain used in a pull-in operation mode and a high servo gain used after completion of the pull-in control mode, for speeding-up a pull-in of a servo track with a high stability during the pull-in operation mode and maintaining a high accuracy of position control of an optical head during a fine position control mode.

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patent: 4748607 (1988-05-01), Nakane
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patent: 4796246 (1989-01-01), Tsuyoshi et al.
patent: 4817069 (1989-03-01), Shigemori
patent: 4827464 (1989-05-01), Tateishi
patent: 4835754 (1989-05-01), Yamamoto et al.

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