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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Aug 10, 2000
filing date -
Dec 24, 1997
priority date (Note) -
Expired
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Abstract
Impedance between potential sensing electrodes of a high impedance meter is measured by applying a ramp waveform through a capacitor coupled to one of the electrodes to generate a substantially constant current, a measure of impedance being obtained by comparing this to the potential developed across the electrodes when a different current is flowing.
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