Head switching method for staggered servo and circuit thereof
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United States of America Patent
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Sep 8, 1998
Grant Date -
N/A
app pub date -
Apr 5, 1994
filing date -
Nov 30, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
A head-switching circuit for switching from a first head operating on a first recording medium to a second head operating on a second recording medium so as to read out data written on a recording medium according to a staggered servo mechanism, includes a selector for selecting one of the recording media, a classifier (20, 30, 31, 32, 33 and 34) for classifying the skew time of a recording medium selected by the selector and another recording medium selected by the selector, a sync signal generator (40, 41, 42, 50, 51), (60, 61, 62, 70, 71, 72 and 80) enabled by the output signal of the classifier for generating a sync signal when the skew time to is identical with a predetermined time, thereby generate a sync signal precisely during head-switching in staggered servo mechanism.
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Cited Art Landscape
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