High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor

Takumi Miyazaki, Shuya Nakagawa, Hiroki Ishikuro

    研究成果: Conference contribution

    抜粋

    This paper describes a high-resolution, highly linear, low power amp-less sensor interface. A Wheatstone-bridge with ΔΣ-modulated digitally controlled variable resistor is proposed. The proposed bridge is automatically balanced by successive approximation (SA) of the digitally controlled resistor, which can eliminate power consuming amplifiers and ADCs. To overcome conversion speed limitation caused by settling time of each SA step, the output differential voltage of the bridge is shorted in advance to the comparison phase of each SA step. A developed prototype system achieved 9.68 bit resolution in target resistance range of three orders of magnitude and conversion speed improvement by 66%.

    元の言語English
    ホスト出版物のタイトル2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
    出版者Institute of Electrical and Electronics Engineers Inc.
    ページ474-477
    ページ数4
    ISBN(電子版)9781728109961
    DOI
    出版物ステータスPublished - 2019 11
    イベント26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 - Genoa, Italy
    継続期間: 2019 11 272019 11 29

    出版物シリーズ

    名前2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019

    Conference

    Conference26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
    Italy
    Genoa
    期間19/11/2719/11/29

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Control and Optimization
    • Computer Networks and Communications
    • Hardware and Architecture

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  • これを引用

    Miyazaki, T., Nakagawa, S., & Ishikuro, H. (2019). High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. : 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 (pp. 474-477). [8965187] (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICECS46596.2019.8965187