Spindle servo apparatus for optical disk player

Details Spindle servo apparatus for optical disk player Spindle servo apparatus for optical disk player

1996-06-26

1998-02-10

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4429, G11B 1552

Patent

active

057176728

ABSTRACT:
A spindle servo apparatus for an optical disk player, which detects a maximum inversion interval or a maximum period from a read signal acquired from an optical disk by pickup means, compares the detected maximum inversion interval or maximum period with a reference value, and drives a spindle motor in accordance with the comparison result. When a tracking servo apparatus is inactive, the spindle servo apparatus sets the reference value greater than the one set when the tracking servo apparatus is active. It is therefore possible to cope with the case where the maximum inversion interval or maximum period which is detected from the read signal is erroneously determined longer than the actual length.

REFERENCES:
patent: 4611319 (1986-09-01), Naito
patent: 5629924 (1997-05-01), Yokogawa

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