000153557 001__ 153557
000153557 005__ 20181203022040.0
000153557 0247_ $$2doi$$a10.1109/jsen.2007.894902
000153557 022__ $$a1530-437X
000153557 02470 $$2ISI$$a000246780600031
000153557 037__ $$aARTICLE
000153557 245__ $$aA Hall sensor analog front end for current measurement with continuous gain calibration
000153557 269__ $$a2007
000153557 260__ $$c2007
000153557 336__ $$aJournal Articles
000153557 500__ $$aTimes Cited: 3
000153557 520__ $$aThis paper presents a new technique for continuously calibrating the sensitivity of a current measurement microsystem based on a Hall magnetic field sensor. An integrated reference coil generates a magnetic field for calibration. Using a variant of the chopper modulation, the spinning current technique, combined with a second modulation of the reference signal, the sensitivity of the complete system is continuously measured without interrupting normal operation. Modulation and demodulation schemes allowing the joint processing of both external and reference magnetic fields are proposed. Additional techniques for extracting the very low reference signal are presented. The implementation of the microsystem is then discussed. Finally, measurements validate the calibration principle. A thermal drift lower than 50 ppm/degrees C is achieved. This is 6-10 times less than in state-of-the-art implementations. Furthermore, the calibration technique also compensates drifts due to mechanical stresses and ageing.
000153557 700__ $$0244585$$g111342$$aPastre, M.
000153557 700__ $$g105540$$aKayal, M.$$0240539
000153557 700__ $$aBlanchard, H.
000153557 773__ $$j7$$tIeee Sensors Journal$$k5-6$$q860-867
000153557 909C0 $$xU11978$$0252315$$pELAB
000153557 909CO $$pSTI$$particle$$ooai:infoscience.tind.io:153557
000153557 937__ $$aEPFL-ARTICLE-153557
000153557 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000153557 980__ $$aARTICLE