Optical disc drive with clock synchronization and rotational...

Details Optical disc drive with clock synchronization and rotational... Optical disc drive with clock synchronization and rotational...

2007-03-20

2007-03-20

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S047310

Reexamination Certificate

active

10401449

ABSTRACT:
An optical disc drive includes: a motor for rotating an optical disc thereon; a photoelectric transducer for converting a light beam, reflected from or transmitted through the disc, into an electric signal; a clock sync signal reader for extracting and outputting a read signal, representing a clock synchronization mark, from the electric signal; a clock generator for generating a clock signal having a variable frequency; a phase locking controller for controlling the clock generator to synchronize the clock signal in phase with the output signal of the clock sync signal reader; and a mechanism for displacing a light beam spot toward a target track on the disc. During a seek operation of displacing the light beam spot toward the target track, the clock generator is controlled to obtain a frequency to be expected on the target track and output a clock signal having the expected frequency.

REFERENCES:
patent: 6104682 (2000-08-01), Konishi
patent: 6172952 (2001-01-01), Inokuchi et al.
patent: 6356522 (2002-03-01), Yamamoto et al.
patent: 2002/0110061 (2002-08-01), Tsuji
patent: 05-225580 (1993-09-01), None
patent: 11-232651 (1999-08-01), None
patent: 2001-176207 (2001-06-01), None
patent: 2001-229564 (2001-08-01), None
patent: WO 00/63897 (2000-04-01), None

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