Detecting head/disk contact using timing jitter

Detecting head/disk contact using timing jitter

A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter may corre...

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Hauptverfasser: Tang, Yawshing, Che, Carl Xiaodong
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creator Tang, Yawshing
Che, Carl Xiaodong
description A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter may correspond to a change in frequency of a read clock generated from the read signal. These approaches allow for detection of head movement in a down track direction. Down track is a direction that is essentially parallel with the longitudinal axis of the head.
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title Detecting head/disk contact using timing jitter
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