Current sensor for a circuit board trace

A current sensor may be used to sense the current in a trace 12a of a printed circuit board 12. The sensor comprises two magnetic field sensors 14, which may be Hall sensors or flux gates. A flux concentrator 13 and/or shielding element 16 may be used to enhance the performance of the sensors 14. Th...

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Bibliographische Detailangaben
Hauptverfasser: JEFFREY L VIOLA, WILLIAM T MOORE
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A current sensor may be used to sense the current in a trace 12a of a printed circuit board 12. The sensor comprises two magnetic field sensors 14, which may be Hall sensors or flux gates. A flux concentrator 13 and/or shielding element 16 may be used to enhance the performance of the sensors 14. The sensors 14 are configured to respond to the magnetic field created by current flowing in conductor trace 12a according to the field polarities at their respective locations. By appropriate adding or subtracting of the sensor signals, the sensor operates in a common mode rejection state, where stray magnetic fields are cancelled.