Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2006-02-14

2006-02-14

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S047250, C369S059220

Reexamination Certificate

active

06999388

ABSTRACT:
An optical disk apparatus capable of adjusting a focus servo and the like by precisely detecting a jitter amount. Light reflected from an optical disk is converted into an RF signal in an optical pickup and amplified by an RF amplifier before being supplied to an equalizer. The boost amount of the equalizer is set to zero during adjustment and set to a predetermined finite value (e.g., +20 dB) during normal recording and reproducing. By first setting the boost amount to zero, the delay characteristics of the RF signal from 3T to 11T are flattened such that an accurate jitter amount can be determined based on the integrated value of the phase differences of 3T to 11T, thereby allowing the optical pickup to be adjusted so as to minimize the jitter amount.

REFERENCES:
patent: 6167010 (2000-12-01), Shimada et al.
patent: 6477125 (2002-11-01), Hayami
patent: 10-069657 (1998-03-01), None
patent: 10-214458 (1998-08-01), None
patent: 11-086302 (1999-03-01), None

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