Disc drive system using multiple pairs of embedded servo bursts
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United States of America Patent
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Feb 2, 1999
Grant Date -
N/A
app pub date -
Jan 30, 1996
filing date -
Jan 30, 1996
priority date (Note) -
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Abstract
A method and apparatus determining head position of a data transducer head relative to a selected one track of a multiplicity of concentric tracks within a magnetic/disc drive is provided. At least one prerecorded servo sector within a data track includes four time staggered servo bursts. The first pair and second pair of servo bursts are radially offset from each other by generally a burst width such that an edge from each of the pair are substantially co-linear in forming a track null. The first pair is radially offset from the second pair by one-half of the burst width. The first pair is read to determine a first relative amplitude therebetween, and the second pair is read to determine a second relative amplitude therebetween. Additionally, the radially offset and time staggered servo bursts prerecorded on the servo sector can be of varying width and numbered to create the plurality of track nulls within a data track about which the head can be positioned.
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