Optical disc device and tracking controlling method therefor

Details Optical disc device and tracking controlling method therefor Optical disc device and tracking controlling method therefor

2008-07-08

2008-07-08

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044340, C369S044290, C369S044410, C369S124120, C369S124150

Reexamination Certificate

active

07397736

ABSTRACT:
Disclosed is an apparatus which includes a tracking error detection circuit, for detecting tracking error signal from outputs of a photodetector, a peak/bottom detection circuit for detecting peak and bottom values of the tracking error signal, a difference circuit for finding the difference between a peak value and a bottom value, and a comparator for comparing an output of the difference circuit with a preset reference voltage VR to output a tracking-off signal based on the result of comparison. The comparator outputs the tracking-off signal, indicating the tracking-off of the light beam spot with respect to a track.

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