Analysis of non-ideal characteristics of an AC-based capacitance transducer for tomography

J.C. Gamio, W.Q. Yang, A.L. Stott

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

    Abstract

    An AC-based capacitance transducer has been designed for use in electrical capacitance tomography (ECT) systems. It has a high signal-to-noise ratio (SNR) and good stray-immunity, compared with a charge/discharge transducer designed for the same purpose. However, the non-ideal characteristics of amplifiers and CMOS switches limit the performance of the AC-based transducer. This paper analyses the effects of the frequency-dependent gain of the amplifiers and the finite “ON” resistance of CMOS switches. It is shown that the non-ideal characteristics restrict the frequency response of the AC-based transducer by introducing extra poles, which depend not only on the parameters of the devices but also on the stray capacitance. Mathematical expressions quantifying these effects are presented.
    Original languageEnglish
    Title of host publication2nd World Congress on Industrial Process Tomography
    PublisherInternational Society for Industrial Process Tomography
    Pages595-602
    Number of pages8
    ISBN (Print)9780853163183
    Publication statusPublished - 2013
    Event2nd World Congress on Industrial Process Tomography - Hannover, Germany
    Duration: 29 Aug 200131 Aug 2001

    Conference

    Conference2nd World Congress on Industrial Process Tomography
    Country/TerritoryGermany
    CityHannover
    Period29/08/0131/08/01

    Research Beacons, Institutes and Platforms

    • Manchester Institute for Collaborative Research on Ageing

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