Optical disk recording/reproducing apparatus and rotary drive th

Details Optical disk recording/reproducing apparatus and rotary drive th Optical disk recording/reproducing apparatus and rotary drive th

1990-01-19

1991-10-01

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Access of multiple storage elements

369239, 369240, G11B 1912

Patent

active

050540149

ABSTRACT:
An apparatus for rotationally driving an optical disk in an optical disk recording and/or reproducing apparatus capable of recording or reproducing signals from disks having different sizes includes a spindle motor for rotationally driving a disk, a servo unit for controlling the rotation of the spindle motor, and a control unit for detecting an activation response state of the spindle motor upon starting, and switching a gain of the servo unit on the basis of the detection result.

REFERENCES:
patent: 4302833 (1981-11-01), Tanaka
patent: 4388713 (1983-06-01), Tatsuguchi
patent: 4623939 (1986-11-01), Machida
patent: 4653040 (1987-03-01), Senso
patent: 4672595 (1987-06-01), Senso
patent: 4680746 (1987-07-01), Senso
patent: 4796249 (1989-01-01), Baas

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