Seek control for information storage disc drive

Details Seek control for information storage disc drive Seek control for information storage disc drive

1991-08-14

1995-11-28

Brier, Jeffery

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, 360 7804, G11B 700, G11B 2110, G11B 5596

Patent

active

054714478

ABSTRACT:
An optical pickup is controlled to move to a target track on an optical information storage disc based on target value information representing the sum of speed information indicative of a speed at which the optical pickup is to move, and distance information indicative of a distance which the optical pickup has moved toward the target track. A first subtractor produces a differential signal indicative of the difference between the target value information and remaining distance information which represents a remaining distance that the optical pickup is to move. The differential signal is supplied to a second subtractor which determines the difference between the differential signal and actual speed information indicating an actual speed at which the optical pick is moving. The second subtractor produces a differential signal which is supplied to an actuator to move the optical head.

REFERENCES:
patent: 3775655 (1973-11-01), Du Vall
patent: 4697127 (1987-09-01), Stich et al.
patent: 4745588 (1988-05-01), Yoshikawa et al.
patent: 4748607 (1988-05-01), Nakane
patent: 4785439 (1988-11-01), Okada et al.
patent: 4837757 (1989-06-01), Okada et al.
patent: 4937803 (1990-06-01), Nakane
patent: 5036506 (1991-06-01), Bierhoff

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