Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2006-02-07

2006-02-07

Hindl, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044410

Reexamination Certificate

active

06996038

ABSTRACT:
In an optical disc apparatus for reading data from an optical disc, levels of photo-detecting signals outputted from a plurality of photo-detecting areas of a photo-detector are adjusted to be substantially even for canceling error components due to positioning error of the photo-detector on an optical pickup. Analogous signals outputted from the photo-detecting areas of the photo-detector are amplified by amplifiers and converted to digital signals by A/D converters. A processor takes the converted digital signals and adjusts gains of the amplifiers with using the digital signals.

REFERENCES:
patent: 5416759 (1995-05-01), Chun
patent: 5610883 (1997-03-01), Yanagawa
patent: 6606284 (2003-08-01), Sakamoto et al.
patent: 05-314522 (1993-11-01), None
patent: 6-111344 (1994-04-01), None
patent: 06-176371 (1994-06-01), None
patent: 2874663 (1999-03-01), None

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