Magnetic recording and reproducing apparatus and control...

Details Magnetic recording and reproducing apparatus and control... Magnetic recording and reproducing apparatus and control...

2007-12-11

2007-12-11

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S048000, C360S039000

Reexamination Certificate

active

11257033

ABSTRACT:
A magnetic recording and reproducing apparatus has a magnetic recording medium onto which servo information including position information is recorded by a concavo-convex pattern formed by a magnetic layer and a signal processing circuit that generates position control signal of a magnetic head based on amplitude values of fundamental wave component and at least one harmonic component in a reproduced signal of the position information. This magnetic recording and reproducing apparatus can increase the output of the position control signal and also increase the accuracy of the positioning control of the magnetic head.

REFERENCES:
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patent: 5590009 (1996-12-01), Ishida
patent: 6262860 (2001-07-01), Ishida
patent: 6510015 (2003-01-01), Sacks et al.
patent: 6816330 (2004-11-01), Ikeda et al.
patent: A 7-73618 (1995-03-01), None
patent: A 7-78432 (1995-03-01), None

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