Disk drive rotating phase based servo bursts based on radial location of head
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United States of America Patent
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Mar 29, 2011
Grant Date -
N/A
app pub date -
May 28, 2010
filing date -
May 28, 2010
priority date (Note) -
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Abstract
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo tracks defined by a plurality of servo sectors, wherein each servo sector comprises a plurality of servo bursts, and each servo burst comprises a predetermined phase. After positioning the head over one of the servo tracks, a servo burst in one of the servo sectors is read to generate a read signal, and a sine and cosine component are extracted from the read signal. At least one of the sine and cosine components is rotated by an angle based on a radial location of the head. A position error signal for the head is generated in response to the rotated component.
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