Apparatus and method for stabilizing operation of disc...

Details Apparatus and method for stabilizing operation of disc... Apparatus and method for stabilizing operation of disc...

2006-08-15

2006-08-15

Young, Wayne (Department: 2656)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044270, C369S044350, C369S059140

Reexamination Certificate

active

07092324

ABSTRACT:
An apparatus which stabilizes an operation of a disc driver in a mode conversion setting section includes a pickup which reads information from a disc that is inserted into the disc driver, a filter which performs a low-pass filtering of a servo error signal that is generated during an operation of the pickup, a selector which selects one of the servo error signal and the low-pass filtered servo error signal from the filter and outputs the selected servo error signal to drive the pickup using the selected servo error signal, and a control signal generator which generates a signal to control the selector to select the low-pass filtered servo error signal in a mode conversion setting section of the disc driver. Accordingly, a defocus and a detrack can be prevented in the mode conversion setting section of the disc driver.

REFERENCES:
patent: 5732052 (1998-03-01), Ando
patent: 6282157 (2001-08-01), Kim et al.
patent: 6597644 (2003-07-01), Kang
patent: 2002/0093891 (2002-07-01), Nishigaki

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