Battery operated capacitance measurement circuit
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United States of America Patent
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Mar 15, 1994
Grant Date -
N/A
app pub date -
Mar 27, 1992
filing date -
Mar 27, 1992
priority date (Note) -
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Abstract
A capacitance measuring circuit uses only a DC voltage source to perform the capacitance measurement. For this purpose, the circuit is arranged to charge an unknown capacitor which is being measured from a DC source and to discharge the capacitor through a constant current circuit such that the discharge voltage across the capacitor decreases linearly from its initial value to a predetermined, final value. The measurement circuit monitors the time taken by the capacitor to discharge in order to determine the capacitance value.
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