Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit

Wan Fazlida Hanim Abdullah, Masuri Othman, Mohd Alaudin Mohd Ali

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    11 Citations (Scopus)

    Abstract

    Response of Chemical Field-Effect Transistor (CHEMFET) electrochemical sensors are taken from the output of a readout interface circuit that maintains constant drain-source voltage and current levels. We employ the readout circuit for the purpose of supervised learning training data collection. Sample solutions are prepared by keeping the main ion concentration constant while the activity of an interfering ion varied based on the fixed interference method. Results show that the voltage response demonstrates linear relationship to the ion concentration within the detection limit. However, noise in the form of abrupt and random changes in DC levels reduces correlation and increases mean square error between similarly repeated measurements. We find that referencing the voltage response to the sensor response in DIW prior to measurement greatly improves the repeatability. The process of approximating ionic concentration level is achieved up to 80% recognition by feeding the readout circuit output to a neural network post-processing stage.

    Original languageEnglish
    Title of host publicationSCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development
    Pages219-221
    Number of pages3
    DOIs
    Publication statusPublished - 2009
    Event2009 IEEE Student Conference on Research and Development, SCOReD2009 - Serdang
    Duration: 16 Nov 200918 Nov 2009

    Other

    Other2009 IEEE Student Conference on Research and Development, SCOReD2009
    CitySerdang
    Period16/11/0918/11/09

    Fingerprint

    Drain current
    Field effect transistors
    Networks (circuits)
    Ions
    Electric potential
    Electrochemical sensors
    Supervised learning
    Mean square error
    Neural networks
    Sensors
    Processing

    Keywords

    • CHEMFET
    • Electrochemical sensors
    • Readout circuit
    • Supervised learning

    ASJC Scopus subject areas

    • Biomedical Engineering
    • Control and Systems Engineering
    • Electrical and Electronic Engineering

    Cite this

    Abdullah, W. F. H., Othman, M., & Ali, M. A. M. (2009). Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit. In SCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development (pp. 219-221). [5443112] https://doi.org/10.1109/SCORED.2009.5443112

    Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit. / Abdullah, Wan Fazlida Hanim; Othman, Masuri; Ali, Mohd Alaudin Mohd.

    SCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development. 2009. p. 219-221 5443112.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abdullah, WFH, Othman, M & Ali, MAM 2009, Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit. in SCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development., 5443112, pp. 219-221, 2009 IEEE Student Conference on Research and Development, SCOReD2009, Serdang, 16/11/09. https://doi.org/10.1109/SCORED.2009.5443112
    Abdullah WFH, Othman M, Ali MAM. Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit. In SCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development. 2009. p. 219-221. 5443112 https://doi.org/10.1109/SCORED.2009.5443112
    Abdullah, Wan Fazlida Hanim ; Othman, Masuri ; Ali, Mohd Alaudin Mohd. / Chemical field-effect transistor with constant-voltage constant-current drain-source readout circuit. SCOReD2009 - Proceedings of 2009 IEEE Student Conference on Research and Development. 2009. pp. 219-221
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