Detecting fly height of a head over a storage medium
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United States of America Patent
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Apr 15, 2008
Grant Date -
N/A
app pub date -
Jan 22, 2007
filing date -
Mar 25, 2003
priority date (Note) -
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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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