Optical disk drive having gain control to maintain stability...

Details Optical disk drive having gain control to maintain stability... Optical disk drive having gain control to maintain stability...

2005-07-12

2005-07-12

Miller, Brian E. (Department: 2652)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053370, C369S116000

Reexamination Certificate

active

06917571

ABSTRACT:
At spin-up of an optical disk3,gain adjustment and offset adjustment are performed on a servo error signal to obtain a first gain adjustment value and a first offset adjustment value. Based on the first gain adjustment value, a CPU11obtains a second gain adjustment value and a second offset adjustment value at data writing on the optical disk3,and stores them in storage7.When the reading state of the optical disk3shifts to the writing operation, the CPU11controls a laser power switching circuit12to change the output from an optical pickup1and, simultaneously, reads the second offset adjustment value and gain adjustment value stored in the storage7and sets them in an offset adjustment unit5and a gain adjustment unit8,respectively.

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patent: 2001-93165 (2001-06-01), None

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