Magnetic field sensor comprising two hall elements
US6184679A · kind A · utility
241Cited by
9References
2Claims
0Family size
Assignee
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Key dates
| Filing date | May 10, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | May 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.