Information recording and reproducing apparatus

Details Information recording and reproducing apparatus Information recording and reproducing apparatus

2007-05-15

2007-05-15

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S044130

Reexamination Certificate

active

10851219

ABSTRACT:
An information recording and reproducing apparatus performs information recording and reproducing on an optical disc having a recording track wobbled by a predetermined frequency. The apparatus includes an optical pickup which irradiates a laser light on the optical disc and receives the laser light reflected by the optical disc to output an electric signal corresponding to the laser light, a push-pull signal generating unit which includes a sample-hold unit and generates the sample-hold push-pull signal and the non-sample-hold push-pull signal from the electric signal, a sample-hold circuit which samples and holds the push-pull signal, a recording clock generating unit which generates a recording clock synchronized with the wobble signal based on the sample-hold push-pull signal during recording and based on the non-sample-hold push-pull signal during reproduction, and a phase adjusting unit which adjusts the phases of the non-sample-hold push-pull signal and the sample-hold push-pull signal.

REFERENCES:
patent: 4748609 (1988-05-01), Yonezawa et al.
patent: 11-345462 (1999-12-01), None

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