Disk reproducing device, a disk reproducing method, a disk rotat

Details Disk reproducing device, a disk reproducing method, a disk rotat Disk reproducing device, a disk reproducing method, a disk rotat

1999-05-07

2000-05-30

Hindi, Nabii

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 54, G11B 509

Patent

active

060698543

ABSTRACT:
A virtual RAM read address generating circuit (41) generates a virtual address-on the basis of an output signal of a crystal oscillation circuit (36). A phase comparison circuit (39) which performs phase comparison with a write address, and a spindle control circuit (3) which controls rotation of a disk with reference to outputs of a frequency comparison circuit (38) and the phase comparison circuit (39) are disposed. Therefore, a phase error can be fed back to a spindle motor, thereby preventing linear velocity deviation from occurring in a steady state. By using the thus configured reproducing device, the reproduction quality in the case where a disk wherein recording was performed by the CLV system is reproduced by the variable linear velocity reproduction system is ensured, and both high-speed access and low power consumption are realized.

REFERENCES:
patent: 4446490 (1984-05-01), Hoshimi et al.
patent: 4937686 (1990-06-01), Arai et al.
patent: 5045812 (1991-09-01), Kiyoshi
patent: 5170386 (1992-12-01), Kiyoshi
patent: 5221882 (1993-06-01), Masafumi
patent: 5761163 (1998-06-01), Nakane et al.
patent: 5774435 (1998-06-01), Hirano

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