Multi-slope analog-to-digital converter
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United States of America Patent
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Mar 4, 1986
Grant Date -
N/A
app pub date -
Nov 9, 1982
filing date -
Nov 9, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-slope analog-to-digital converter avoids the dielectric absorption problem by providing a predetermined number of risings and fallings of the output of an integrator integrating an input analog signal during a first predetermined period of time, each falling corresponding to the simultaneous integration of a first reference signal during the first integration period. Subsequently the first reference signal is integrated for a time period to assure that the output signal of the integrator has a predetermined polarity, prior to completing the measurement of the input analog signal during further integration periods. Variations in the number of switching delays, and variations depending upon the direction with which the output of the integrator approaches a reference level, may thus be avoided.
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