Rotation control circuit based on the mean value of run length c

Details Rotation control circuit based on the mean value of run length c Rotation control circuit based on the mean value of run length c

1995-11-30

1998-10-20

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

360 7303, G11B 19247

Patent

active

058257322

ABSTRACT:
Disclosed are a rotation servo circuit and a reproducing apparatus equipped therewith. In the rotation servo circuit, the average value of an inversion probability pattern of a run length code recorded on a recording medium is calculated in advance and, on the basis of the average value thus obtained, a reference rotation voltage is generated, so that a rotation in accordance with the reference rotation voltage is effected whenever a reference number of revolutions is deviated from.

REFERENCES:
patent: 4338683 (1982-07-01), Furukawa
patent: 4386300 (1983-05-01), Ogawa
patent: 4397011 (1983-08-01), Ogawa
patent: 4908810 (1990-03-01), Oie
patent: 5270992 (1993-12-01), Yasuda et al.

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