Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1998-01-09
2000-03-14
Huber, Paul W.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 59, G11B 509
Patent
active
060382015
ABSTRACT:
Method and apparatus for retrieving the information recorded on the rewritable magneto.sub.-- optical media is disclosed. According to the present invention, while a regeneration beam in synchronization with a clock signal is irradiated on a mark recorded on a rewritable magneto.sub.-- optical media, a regeneration signal detector detects a regenerated electrical signal from the recorded mark. On the other hand, a phase difference detector detects the phase difference between the clock signal and the regenerated electrical signal. The clock signal is delayed as much as the said phase difference and then its delayed clock signal is used as a sampling signal. The regenerated electrical signal is sampled and held in response to said sampling signal and then the regenerated electrical signal which is sampled and held by said sample-and-holder is converted into a regenerated bit signal.
REFERENCES:
patent: 5253243 (1993-10-01), Suzuki
patent: 5596559 (1997-01-01), Hiramatsu
patent: 5598389 (1997-01-01), Nakano et al.
Huber Paul W.
LG Electronics Inc.
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