Detecting fly height of a head over a storage medium

Details Detecting fly height of a head over a storage medium Detecting fly height of a head over a storage medium

2008-04-15

2008-04-15

Korzuch, William (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S031000

Reexamination Certificate

active

07359139

ABSTRACT:
A fly height control system comprises a measurement circuit that measures a first amplitude of a pulse, which is based on a predetermined pattern recorded on a storage medium, at a first predetermined time and second amplitudes of the pulse at respective second predetermined times. A calculation circuit estimates a distance between a head and the storage medium based on a function of the first amplitude and the second amplitudes. A head controller that controls the distance between the head and the storage medium based on the estimate.

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