Capacitance sensing circuit for membrane pressure sensor
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United States of America Patent
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-
Dec 21, 2010
Grant Date -
Jun 25, 2009
app pub date -
Mar 3, 2009
filing date -
Oct 18, 2004
priority date (Note) -
Expired
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Abstract
to ground. The charge injector and amplifier are arranged in parallel connection between the capacitors and the controller. The controller is configured to determine a charge imbalance indicative of a pressure difference between membranes of the pressure sensor.
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