NDLI: Hysteresis Compensation Based on Controlled Current Pulses for Magnetoresistive Sensors

Content Provider	IEEE Xplore Digital Library
Author	Fei Xie Weiss, R. Weigel, R.
Copyright Year	1982
Abstract	This paper presents a novel hysteresis compensation method for increasing the measurement accuracy of magnetoresistive (MR) sensors such as anisotropic magnetoresistance (AMR), giant magnetoresistance (GMR), and tunnel magnetoresistance (TMR) sensors. A coil consisting of one winding is processed on top of the sensor element. This configuration allows short current pulses (positive and negative) to generate a defined magnet field, which should be much stronger than the field to be measured. In this case, the MR sensors can always be kept in the same magnetic loop (major loop) during the measurement cycle. By demodulating or averaging the output signal of the sensor, the influence of the sensors hysteresis can be largely reduced. A mixed signal circuit consisting of a field-programmable gate array, analog-to-digital converters and analog switches is used to generate the pulses. AMR, GMR, and TMR current sensors are chosen as examples in the experiment. Current measurements with and without controlled magnetic field pulse are compared. A hysteresis reduction to nearly 20% of the original value, by using the novel hysteresis compensation method, is reached.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	7804
Ending Page	7809
Page Count	6
File Size	1156417
File Format	PDF
ISSN	02780046
Volume Number	62
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic sensors Current measurement Magnetic hysteresis Bridge circuits Magnetic field measurement Temperature measurement measurement accuracy Anisotropic magnetoresistance (AMR) giant magnetoresistance (GMR) tunnel magnetoresistance (TMR) hysteresis compensation current measurement major loop digital signal conditioning
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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