Adaptive dampening of thermal asperity events in disc drives

Adaptive dampening of thermal asperity events in disc drives

This invention relates generally to the field of data storage devices, and more particularly, but not by way of limitation, to adaptive dampening of thermal asperity events for disc drive. A method for the adaptive dampening of a peak amplitude of a thermal asperity signal in a disc drive to minimiz...

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Hauptverfasser: Lim, Eng Hock, Ko, Beng Theam, Teo, Hweepeng, Chong, Fong Kheon, Ngwe, Myint, Gan, Kah Liang
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Sprache:eng
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creator Lim, Eng Hock
Ko, Beng Theam
Teo, Hweepeng
Chong, Fong Kheon
Ngwe, Myint
Gan, Kah Liang
description This invention relates generally to the field of data storage devices, and more particularly, but not by way of limitation, to adaptive dampening of thermal asperity events for disc drive. A method for the adaptive dampening of a peak amplitude of a thermal asperity signal in a disc drive to minimize loss of read data integrity, including the steps of determining a peak-to-peak preamble signal amplitude for identifying an amplitude signal range of the peak amplitude of the thermal asperity signal; measuring the peak amplitude of the thermal asperity signal; separating the peak-to-peak preamble signal amplitude into substantially even portions for use in calculating a value of the amplitude signal range of the peak amplitude of the thermal asperity signal; calculating the value of the amplitude signal range of the peak amplitude of the thermal asperity signal for use in determining a dampening resistance used by a dampening circuit to adaptively dampen the peak amplitude of the thermal asperity signal; and activating the dampening circuit to dampen the peak amplitude of the thermal asperity signal.
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title Adaptive dampening of thermal asperity events in disc drives
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