Servo system for positioning a read/write head within a storage

Details Servo system for positioning a read/write head within a storage Servo system for positioning a read/write head within a storage

1992-12-14

1994-10-11

Wimer, Michael C.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 69, G11B 509, G11B 1518

Patent

active

053552601

ABSTRACT:
In a servo system for a hard disk drive, a malfunction detection circuit monitors a period of a sync signal contained in servo data and outputs a malfunction detection signal indicating that there is a malfunction relating on the servo data. The malfunction detection circuit delivers a malfunction detecting signal when a generation period of a sync signal is longer or shorter than a predetermined cycle initially set. The malfunction detecting circuit includes a pulse generator for generating a pulse signal which is synchronized with the sync signal and first and second pulse generators for measuring a period of the sync signal.

REFERENCES:
patent: 4238809 (1980-12-01), Fujiki et al.
patent: 4390910 (1983-06-01), Wilson
patent: 4811126 (1989-03-01), Suzuki et al.
patent: 4910617 (1990-03-01), Brunnett et al.
patent: 5115359 (1992-05-01), Sidman
patent: 5177651 (1993-01-01), Moraru et al.

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