Tracking induction system and method for optical disc drivers

Details Tracking induction system and method for optical disc drivers Tracking induction system and method for optical disc drivers

1993-06-30

1994-09-27

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4434, G11B 7085

Patent

active

053512235

ABSTRACT:
A tracking induction system and method in which an artificial tracking induction signal is generated by selectively outputting one of a tracking error signal that is a well-known position error signal detected by a detector of an optical disc driver, a sum signal that is a signal phase-shifted 90.degree. from the position error signal and provided by the detector, a tracking error enable signal, a -V on signal and a +V on signal, the latter three signals being provided by a microprocessor, according to a selective switching operation of a switching unit for each track interval, so that the artificial tracking induction signal is applied to a tracking servo circuit, thereby achieving a tracking induction to a target track, even at intervals of .+-.1/2 track pitches or more from the target track. The tracking induction method includes three steps of shifting a laser beam to one track pitch before the target track, shifting the laser beam toward the target track while checking whether the laser beam is positioned within a range of .+-.1/2 track pitches from the target track, and shifting the laser beam toward the target track while checking whether the laser beam is positioned with in a range of .+-.1/4 track pitches from the target track.

REFERENCES:
patent: 4839876 (1989-06-01), Fennema
patent: 5050146 (1991-09-01), Richgels et al.
patent: 5090002 (1992-02-01), Chow et al.
patent: 5101390 (1992-03-01), Kuwabara
patent: 5144605 (1992-09-01), Kobayashi et al.

Affiliated with

Also associated with

Rating

Tracking induction system and method for optical disc drivers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tracking induction system and method for optical disc drivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking induction system and method for optical disc drivers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1269931