Recording clock generating apparatus for a data recording...

Details Recording clock generating apparatus for a data recording... Recording clock generating apparatus for a data recording...

2006-07-11

2006-07-11

Young, W. R. (Department: 2652)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S047280, C369S053340

Reexamination Certificate

active

07075868

ABSTRACT:
A recording clock generating apparatus for a data recording system includes a wobble signal sampler which samples a wobble signal, from wobble grooves of an optical disk. A first phase comparator provides a first phase-difference signal based on a difference in phase between the wobble signal and a first recording clock signal. A prepit detector detects a prepit signal from prepits of the optical disk. A second phase comparator provides a second phase-difference signal based on a difference in phase between the prepit signal and the first recording clock signal. A phase control signal generator provides a phase control signal based on a sum of the first phase-difference signal and the second phase-difference signal. A clock generator provides a second recording clock signal having a phase corrected in response to the phase control signal provided by the phase control signal generator.

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patent: 6693862 (2004-02-01), Shigemori
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