Technique for improving the resolution of an A/D converter
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United States of America Patent
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Sep 18, 1990
Grant Date -
N/A
app pub date -
Oct 21, 1988
filing date -
Oct 21, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a technique for improving the resolution of an A/D converter. The input analog signal is sampled to generate an analog level and the analog level is held for an interval. A random noise signal having zero average value is superimposed on the held level to generate a fluctuating voltage. This fluctuating voltage is then sampled a plurality of at least N times, and N sampled values are communicated to the A/D converter so that N digitized values are generated. These digitized values are averaged to provide an output having a digitization error reduced by a factor of N.sup.1/2.
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