Rotatable memory disk apparatus

Details Rotatable memory disk apparatus Rotatable memory disk apparatus

1983-09-22

1985-07-16

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369 41, 369240, G11B 1706, G11B 1924, G11B 1700

Patent

active

045300836

ABSTRACT:
A rotatable memory disk apparatus is provided with a memory disk with a number of tracks driven by a motor and a control circuit for positioning an optical head on an addressed track. The apparatus includes a speed control device for rotating the disk at a rotational speed corresponding to the addressed track. The speed control device includes a conversion circuit for converting a track-addressing signal from the control circuit into an instruction signal for the rotational speed of the disk, a detector for obtaining a rotational speed signal of the disk, and a control device which receives the rotational speed instruction signal and the rotational speed signal to rotate the disk at a predetermined rotational speed for the addressed track.

REFERENCES:
patent: 4190860 (1980-02-01), Somers et al.
patent: 4361880 (1982-11-01), Kitamura et al.
patent: 4416006 (1983-11-01), Kitamura et al.
patent: 4450552 (1984-05-01), Marcantonio

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