Disk playing apparatus having a compensation characteristic vari

Details Disk playing apparatus having a compensation characteristic vari Disk playing apparatus having a compensation characteristic vari

1990-09-21

1992-02-04

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369 59, 369 48, 360 7301, G11B 700

Patent

active

050864211

ABSTRACT:
A disk playing apparatus having a compensating circuit for compensating phase and frequency characteristics of a read signal from a disk, wherein a compensation characteristic of the compensating circuit is varied according to a linear velocity. The disk playing apparatus includes means for reading information from the disk and means for outputting velocity information indicative of a reading speed from the disk by the reading means. The compensation characteristic is varied according to the velocity information. Accordingly, in the case of a CLV disk, a flat group delay characteristic is always obtained irrespective of changes in the linear velocity.

REFERENCES:
patent: 4338683 (1982-07-01), Furukawa et al.
patent: 4575835 (1986-03-01), Nishikawa et al.
patent: 4623939 (1986-11-01), Machida et al.
patent: 4908810 (1990-03-01), Oie

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