Time delay charge integration circuit
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United States of America Patent
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Apr 27, 1999
Grant Date -
N/A
app pub date -
Mar 28, 1997
filing date -
Mar 28, 1997
priority date (Note) -
Expired
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Abstract
A charge integration circuit incorporates first and second capacitors, and first and second reference voltage supplies. A first switch controls integration of charge in the first capacitor and selectively resets the first capacitor to the first reference voltage. A second switch selectively resets the second capacitor to the first reference voltage. A current mirror coupled to the capacitors effects discharge of the second capacitor by a quantity of charge equivalent to the charge integrated on the first capacitor so as to effectively transfer charge therebetween at the end of an integration period.
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