Adjacent magnetoresistive read head and method for obtaining position error signal
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United States of America Patent
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Jul 29, 2008
Grant Date -
Feb 9, 2006
app pub date -
Aug 3, 2004
filing date -
Aug 3, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A read head for reading magnetically stored data in adjacent tracks of a medium has at least two elongate bodies, each having at least one magnetoresistive part. The magnetoresistive parts have sensor portions defined along a length of the elongate bodies, by electrical connections to the magnetoresistive parts. A shield is provided at least on opposite transfer sides of the elongate bodies. The read head is used for calculating a position error signal by calculating a correlation between signals received from the respective sensor portions when the head is positioned over adjacent tracks on the medium, with one of the sensors positioned near a boundary between the tracks. The position error is calculated by determining the correlation between signals from the respective sensor portions.
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