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Thermal behaviour of CMOS Hall sensors for different operating modes

Siehe auch: Sensors and Actuators B
: Gottfried-Gottfried, R.

Giber, J.; Göpel, W.; Holmes, I.L.; Horvai, G.; Meixner, H.; Timar-Horvath, V. ; Budapesti Müszaki Egyetem, Eötvös Lorand Fizikai Tarsulat:
Eurosensors VII. Book of Abstracts
Budapest, 1993
Eurosensors <7, 1993, Budapest>
Fraunhofer IMS, Außenstelle Dresden ( IPMS) ()
Betriebsparameter; CMOS-Technik; Hall-Generator; Offsetreduktion; Temperaturstabilität

New results obtained with CMOS Hall sensors are presented. The dependence of the sensitivity on temperature has been investigated for constant-current and constant-voltage operation modes. The current-related sensitivity varies with a very low value of 0.03 percent/degree C in the constant-voltage mode. A new NMOS Hall sensor with eight contacts enables the spinning-current technique to be used for offset reduction. The averaged offset values of all eight possible current directions in this sensor exhibit an offset suppression by a factor up to 2000. This leads to a magnetic-field offset of the spinning-current sensor of less than +/-200 myT for a wide temperature range.