Online digital offset voltage compensation method for AMR sensors

A.C. Zambrano Constantini, Hans G. Kerkhoff

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    2 Citations (Scopus)

    Abstract

    The offset voltage is an undesirable voltage included at the output of an anisotropic magnetoresistance angle sensor, which affects the accuracy of the angle measurement. This voltage changes with sensor aging and hence should be compensated not just at the moment of manufacturing but also during the sensor lifetime. This can be accomplished by an online offset voltage compensation method. However, the vast majority of the methods proposed so far cannot be used online. This research proposes an online digital compensation method based on an equations system. It was verified using as input, voltages calculated with a mathematical model of the sensor and also with voltages measured in commercial angle sensors. For all cases, the offset voltages and the angle errors were lower after compensation. These results show the feasibility of the proposed method to improve the accuracy of the sensor.
    Original languageUndefined
    Title of host publicationIEEE International Instrumentation and Measurement Technology Conference, I2MTC 2015
    Place of PublicationUSA
    PublisherIEEE Instrumentation & Measurement Society
    Pages1512-1515
    Number of pages4
    ISBN (Print)978-1-4799-6113-9
    DOIs
    Publication statusPublished - 13 May 2015
    Event2015 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2015 - Pisa, Italy
    Duration: 11 May 201514 May 2015

    Publication series

    Name
    PublisherIEEE Instrumentation & Measurement Society

    Conference

    Conference2015 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2015
    Abbreviated titleI2MTC
    CountryItaly
    CityPisa
    Period11/05/1514/05/15

    Keywords

    • EWI-26054
    • CAES-TDT: Testable Design and Test
    • offset voltage
    • METIS-312622
    • compensation
    • AMR sensor
    • IR-96842
    • Online

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