Spindle control circuit of optical disk drive

Details Spindle control circuit of optical disk drive Spindle control circuit of optical disk drive

1994-10-25

1996-02-27

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 32, 369 47, 358340, G11B 700

Patent

active

054954657

ABSTRACT:
A spindle control circuit of an optical disk drive capable of performing a high precision and high stability spindle control by preventing an off-control even if the rotation speed is shifted from a predetermined linear velocity such as when a spindle starts rotating or during a search. First and second band-pass filters are provided having a narrow band and a broad band, with the center frequency of the band being set to the center frequency of a wobble signal picked up from an optical disk, An output of the second band-pass is selectively outputted until lock state is detected, and an output of the first band-pass filter is selectively outputted after the lock state is detected. A linear velocity control is performed in accordance with a selected output of the first and second band-pass filters.

REFERENCES:
patent: 5065253 (1991-11-01), Ishii
patent: 5163035 (1992-11-01), Horikiri

Affiliated with

Also associated with

Rating

Spindle control circuit of optical disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spindle control circuit of optical disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spindle control circuit of optical disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1684206