Digital servo system for obtaining by calculation a control sign

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369 4429, 369116, G11B 700

Patent

active

055441360

ABSTRACT:
A tracking servo system for controlling the positional difference between a recording track of an optical disk and a light beam emitted on the track, in which the amount of offset control applied to an offset adjusting amplifier provided in the servo loop is varied and the center value of the positive and negative peak values of a track error signal obtained at that time is computed. Then, the relation between the amount of offset control and the center value of the peak values of the track error signal is determined and the amount of offset control corresponding to the desired center value of the peak values of the track error signal is obtained on the basis of the determined relation. Further, a laser beam emission power adjusting system used for recording and/or reproducing in an optical disk apparatus is disclosed, in which the laser beam emission adjusting output is varied and the amount of beam emission power obtained at that time is detected. Then, the relation between the laser beam emission adjusting output and the amount of beam emission power is determined and the value of the laser beam emission adjusting output corresponding to the desired amount of beam emission power is obtained on the basis of the determined relation.

REFERENCES:
patent: 4942564 (1990-07-01), Hofer et al.
patent: 5048002 (1991-09-01), Horie et al.
patent: 5084848 (1992-01-01), Deguchi et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Digital servo system for obtaining by calculation a control sign does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital servo system for obtaining by calculation a control sign, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital servo system for obtaining by calculation a control sign will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2197291

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.