Linear capacitance measurement circuit
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United States of America Patent
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app pub date -
Feb 27, 2001
filing date -
Mar 10, 1998
priority date (Note) -
Abandoned
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Abstract
A capacitive measurement circuit detects a change in capacitance between a variable capacitor and a fixed reference capacitor in a bridge network and provides feedback current to null-balance the bridge. Voltage that controls the feedback current is substantially linearly proportional to changes in capacitance over a wide range.
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