Disc recording/reproducing apparatus having two constant linear

Details Disc recording/reproducing apparatus having two constant linear Disc recording/reproducing apparatus having two constant linear

1991-05-31

1993-11-23

Heyman, John S.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 50, 369 58, 360 101, 360 27, 360 7303, 358337, 358342, 307271, G11B 2710, H03L 708

Patent

active

052650812

ABSTRACT:
A disc reproducing apparatus comprises a reference frequency generating circuit that generates a reference frequency signal. The frequency of the reference frequency signal from the reference frequency generating circuit is varied whereby a disc is reproduced at both a first and a second constant linear velocity, the second velocity being higher than the first. The improvement over the prior art is that the frequency of the reference frequency signal is varied gradually in steps upon switching from the first constant linear velocity to the second constant linear velocity.

REFERENCES:
patent: 4353089 (1982-10-01), Winslow et al.
patent: 4959825 (1990-09-01), Okano
patent: 4984227 (1991-01-01), Yoshimaru
patent: 5134500 (1992-07-01), Tobe

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