Disk drive circuit with partial match detection for predetermined bit sequence
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United States of America Patent
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-
Oct 24, 1995
Grant Date -
N/A
app pub date -
Jul 6, 1992
filing date -
Jul 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a disk drive where data bits containing a bit sequence signifying a specified location of a data block are read from a disk. A reference bit sequence identical to the recovered bit sequence is generated. Each of the recovered bit sequence and the reference bit sequence is divided into M groups of K bits. The M groups of the recovered bit sequence and the corresponding M groups of the reference bit sequence are compared with each other and a coincidence signal is produced for each of M pairs of compared groups when there is a bit-by-bit match therebetween. A match detector determines if the coincidence signal is generated from all pairs of the compared groups or from N out of M pairs of the compared groups.
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