Clock reproducing device utilizing a frequency of wobble groove

Details Clock reproducing device utilizing a frequency of wobble groove Clock reproducing device utilizing a frequency of wobble groove

1996-10-08

1997-12-30

Tran, Thang V.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 50, G11B 509

Patent

active

057038511

ABSTRACT:
A spindle rotational information is obtained and a positive spindle servo control or a recording operation control is carried out in the case that CLV servo is performed in reference to a groove information. A recording or reproducing device corresponding to a disc having some recording trucks formed therein by grooves wobbled in response to their absolute positional information is comprised of the information reading means 3, the frequency information extracting means 7, 10 for extracting groove frequency information, the frequency measuring means 21, the rotational servo means 9 and the control means 11. The control means 11 controls an operation of the rotational servo means in response to the result of measurement performed by the frequency measuring means 21. In the recording device, the control means 11 controls a recording operation timing with the recording means by using the result of measurement performed by the frequency measuring means 21.

REFERENCES:
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patent: 5065384 (1991-11-01), Yokogawa
patent: 5093820 (1992-03-01), Maeda et al.
patent: 5109369 (1992-04-01), Maeda et al.
patent: 5163035 (1992-11-01), Horikiri
patent: 5182741 (1993-01-01), Meada et al.
patent: 5185732 (1993-02-01), Ogawa et al.
patent: 5528573 (1996-06-01), Shim

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