Signal processing technique which separates signal components in a sensor for sensor diagnostics
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United States of America Patent
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Sep 21, 1999
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N/A
app pub date -
Mar 26, 1998
filing date -
Nov 7, 1996
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Abstract
A device in the process control system includes a sensor input receiving a sensor signal. The sensor signal comprises a process variable signal and a residual sensor signal related to sensor operation. Diagnostic circuitry receives a separated sensor signal and responsively provides a diagnostic output related to the sensor. Sensor signal processing circuitry separates the sensor signal into signal components which are provided to the diagnostic circuitry.
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