Apparatus and method for monitoring radiant energy signals with variable signal gain and resolution enhancement
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United States of America Patent
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Aug 11, 1992
Grant Date -
N/A
app pub date -
Sep 5, 1990
filing date -
Sep 5, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor board for use with an endpoint controller which monitors light intensity is provided. The sensor board can provide a dynamic range of up to five million because a constant current driver and phase sensitive detector help eliminate noise from the detected signal. The sensor board can also subtract a DC voltage offset from the detected signal and amplify the difference to provide increased resolution of small changes in the detected signal.
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