A galvanic isolated evaluation of a NTC thermistor using a logarithmic amplifier | IEEE Conference Publication | IEEE Xplore

A galvanic isolated evaluation of a NTC thermistor using a logarithmic amplifier


Abstract:

This paper presents a possibility to evaluate a NTC (negative temperature coefficient) thermistor, which exhibits an exponential behavior, using a logarithmic circuit. Th...Show More

Abstract:

This paper presents a possibility to evaluate a NTC (negative temperature coefficient) thermistor, which exhibits an exponential behavior, using a logarithmic circuit. The presented method allows a quicker and precise processing compared to look-up tables or linearizing circuits. The resistance value is converted into a galvanic isolated voltage signal. Furthermore the presented design is optimized for a low current consumption. Both features allow a direct application on the power stage side with a supply given by IGBT driver auxiliary supply.
Date of Conference: 21-24 September 2014
Date Added to IEEE Xplore: 11 December 2014
Electronic ISBN:978-1-4799-2060-0
Conference Location: Antalya, Turkey

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