Method and apparatus for data pulse qualification wherein the amplitude of a preceding pulse of opposite polarity is tracked
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United States of America Patent
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Sep 7, 1999
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N/A
app pub date -
Apr 24, 1996
filing date -
Apr 24, 1996
priority date (Note) -
Expired
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Abstract
In a method and apparatus for qualifying peaks in a signal as representing data bits, the signal containing data bits superimposed with background signals, a peak is qualified as representing a data bit when a first derivative of the peak exceeds a threshold value simultaneously with the original signal exceeding a positive or negative threshold of a hysteresis comparator. The respective positive and negative thresholds of the hysteresis comparator are alternatingly and continually adjusted by setting the negative hysteresis threshold dependent on the amplitude of a most recent positive peak in the incoming signal, and setting the positive hysteresis threshold dependent on the amplitude of a most recent negative peak in the incoming signal.
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