Tracking apparatus for sampled servo system which performs track

Details Tracking apparatus for sampled servo system which performs track Tracking apparatus for sampled servo system which performs track

1994-10-24

1996-07-02

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4426, G11B 7095

Patent

active

055329888

ABSTRACT:
A tracking apparatus for a sampled servo system, wherein a tracking servo loop is opened when a jump command is generated by ceasing to supply a tracking error signal to a tracking control circuit, which is instead supplied with a kick pulse to start a track jump operation. Thereafter the tracking control circuit is reset to relay the tracking error signal when a read track is switched causing a change in value of an odd/even determining signal to close the tracking servo loop. Finally a brake pulse is supplied to the tracking control circuit for terminating the track jump operation. This enables an irradiating spot to be stably led into a target track when the track jump operation is switched back to the tracking servo operation even if the track pitch of the disk being read is variable.

REFERENCES:
patent: 4817073 (1989-03-01), Suzuki
patent: 4819219 (1989-04-01), Nagano
patent: 4980877 (1990-12-01), Sugiyama et al.
patent: 5164646 (1992-11-01), Tawaragi et al.

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