Synchronous read channel employing a sequence detector with programmable detector levels
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United States of America Patent
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Dec 1, 1998
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N/A
app pub date -
Mar 19, 1997
filing date -
Feb 1, 1993
priority date (Note) -
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Abstract
A synchronous read channel is disclosed which samples an analog read signal from a magnetic read head positioned over a magnetic disk medium, filters the sample values according to a desired partial response, extracts timing information from the filtered sample values, and detects an estimated data sequence from the filtered sample values using a trellis type sequence detector matched to the partial response. The trellis sequence detector comprises programmable detector levels which allows for maximum flexibility in matching the sequence detector to the partial response.
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