Electricity measurement apparatus using hall effect sensor having rectified bias current
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United States of America Patent
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Mar 14, 2000
Grant Date -
N/A
app pub date -
Sep 16, 1997
filing date -
Mar 16, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electricity meter includes a sensor supplied with a rectified A.C. supply signal, the sensor detecting the strength of magnetic field induced by current flow along a conductor and providing an output signal following a sine-squared relation with alternating positive and negative sign in each half cycle, the output signal being filtered to remove a component due to D.C. offset error.
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