Two-dimensional pattern digitizer
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United States of America Patent
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Jul 21, 1998
Grant Date -
N/A
app pub date -
Jun 20, 1995
filing date -
Jun 22, 1994
priority date (Note) -
Expired
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Abstract
A digitizer includes a reference level generator for generating a reference level, a comparator for comparing a signal level of the analog input with the reference level to provide a digitized output, a first detecting circuit for detecting a moderate change in the signal level of the analog input so as to change the reference level in accordance with the detected moderate change in the signal level of the analog input, and a second detecting circuit for detecting a rapid change in the signal level of the analog input so as to change the reference level in accordance with the detected rapid change in the signal level of the analog input.
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