Current derivative sensor
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United States of America Patent
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Sep 14, 2004
Grant Date -
Feb 20, 2003
app pub date -
Aug 12, 2002
filing date -
Aug 10, 2001
priority date (Note) -
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Abstract
A system and method for detecting, measuring, and reporting a time derivate of a current signal (di/dt). A sensing element detects current from a load. The sensing element includes an inductor. The inductor is located in series with the load and includes associated parasitic resistance. A differential potential develops across the inductor and the parasitic resistance. The differential potential is amplified and converted to a single-ended value. The single-ended value is then fed to an analog to digital converter that provides an output representative of di/dt.
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