Track-jumping servo apparatus for disc-shaped optical record med

Details Track-jumping servo apparatus for disc-shaped optical record med Track-jumping servo apparatus for disc-shaped optical record med

1989-10-12

1992-04-14

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4432, 369 4435, G11B 700

Patent

active

051054060

ABSTRACT:
A gain crossover frequency in a tracking servo system for a disc-shaped optical record medium is lowered during an application of a track jump signal to the tracking servo system for jumping from one track to another, thereby removing the tracking jump operation from the servo system, and performing a sure-footed track jump operation; whereas, displacement of the scanning point, which is slower than the response speed corresponding to the lowered gain crossover frequency, is corrected even during the track jump operation.

REFERENCES:
patent: 3854015 (1974-12-01), Janssen
patent: 4799206 (1989-01-01), Imanaka

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