Track search control circuit and optical disc drive

Details Track search control circuit and optical disc drive Track search control circuit and optical disc drive

2006-08-08

2006-08-08

Psitos, A M (Department: 2656)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044380

Reexamination Certificate

active

07088646

ABSTRACT:
Disclosed is a track-search control circuit for performing track-search of an optical disc stably even at the time of multi-speed reproduction of the optical disc. The track search control circuit comprises a circuit for detecting the light beam having traversed the track when the light beam moves in the radial direction of the optical disc and generating a normal direction on-track signal FVACLR at the time of being on the track and a normal direction off-track signal FVBCLR at the time of being off the track, a first measurement circuit that starts time measurement at the time of generating the normal direction on-track signal, a second measurement circuit that starts time measurement at the time of generating the normal direction off-track signal, circuits which detect the error between a moving velocity of the optical beam in the radial direction of the optical disc and a target velocity based on a measurement output by the first measurement circuit and a measurement output by the second measurement circuit, and a correction circuit for correcting the moving velocity of the optical beam in the radial direction based on the detected error signal.

REFERENCES:
patent: 4955010 (1990-09-01), Nabeshima et al.
patent: 5339299 (1994-08-01), Kagami et al.
patent: 5371726 (1994-12-01), Suzuki
patent: 5661705 (1997-08-01), Kunikata et al.
patent: 5671200 (1997-09-01), Yamaguchi et al.
patent: 63-317992 (1988-12-01), None
patent: 2-143927 (1990-06-01), None

Affiliated with

Also associated with

Rating

Track search control circuit and optical disc 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 Track search control circuit and optical disc drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Track search control circuit and optical disc drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3656765