Magnetic field sensor and current and/or energy sensor
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United States of America Patent
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Aug 24, 1999
Grant Date -
N/A
app pub date -
Oct 23, 1996
filing date -
Oct 30, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A magnetic field sensor has two flux concentrators which serve to strengthen a magnetic field to be measured and which are separated by an air gap. Two Hall elements are arranged outside the air gap in such a way that at least a part of the field lines which lead from the first to the second flux concentrator pass through the two Hall elements in approximately opposite directions. Such a magnetic field sensor is less sensitive to external interference fields. It is suitable for the measurement of very weak magnetic fields and also for use as a current and/or energy sensor.
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