Track access control circuit of optical disk unit

Details Track access control circuit of optical disk unit Track access control circuit of optical disk unit

1990-09-28

1991-07-16

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 4429, 369 4435, 369 4436, 369124, 369 43, G11B 700

Patent

active

050330373

ABSTRACT:
A track access control circuit of an optical disk unit comprising a track actuator (14) with an object lens driven at a relatively high frequency and a positioner for moving the track actuator at a relatively low frequency, a beam moving velocity or a target velocity of the positioner being modified and applied as a driving current to the positioner for preventing a tracking delay of the positioner from occurring during a seek operation.

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patent: 4641020 (1987-02-01), Iwai
patent: 4769806 (1988-09-01), Takamori
patent: 4837757 (1989-06-01), Okada et al.
patent: 4858214 (1989-08-01), Baba
patent: 4899325 (1990-02-01), Katsuhara et al.
patent: 4901299 (1990-02-01), Nakatsu
patent: 4955011 (1990-09-01), Baba
patent: 4985882 (1991-01-01), Tahaka et al.

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