Direct current magnetoresistive jog offset compensation
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United States of America Patent
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Sep 4, 2018
Grant Date -
Feb 1, 2018
app pub date -
Oct 6, 2017
filing date -
Jun 1, 2016
priority date (Note) -
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Abstract
Systems and methods for compensating for magnetoresistive (MR) jog offset direct current (DC) drift in a disc drive are described. In one embodiment, a method may include determining an occurrence of NOS, for example, by monitoring disc slip, to determine when the method should proceed. An MR jog offset DC drift amount is determined for each head of the disc drive. One of several approaches may be employed for determining the MR jog offset DC drift amount. By determining an MR jog offset DC drift amount for each head, a compensation profile is determined for the drive. The determined compensation profile may then be used during operation of the disc drive to compensate for the DC drift. One of several approaches may be employed for compensating based on the compensation profile.
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