Disk drive servosystem using gray code
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United States of America Patent
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-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Nov 13, 1990
filing date -
Nov 13, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A servosystem for controlling position of a magnetic head relative to a magnetic storage disk in a disk drive includes first and second feedback loops which provide head position error signals. The first feedback loop includes a head position circuit that processes different recorded Gray coded binary expressions that identify the data tracks on the disk during a track seek mode. The second feedback loop includes a head position circuit which, during the seek and track following modes, processes recorded quadrature servo signals that are interleaved with the data tracks.
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