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Digitally Controlled Reference Impedance Device for Test and Calibration of the Bio-Impedance Measurement System (BIMS) in a Networked Environment

  • A. Birjukov
  • Andrei Krivoshei
  • T. Parve
Part of the IFMBE Proceedings book series (IFMBE, volume 17)

Abstract

With emerging new developments in the scope of the Bio-Impedance Measurement System (BIMS), an automated test of the data acquisition equipment and its proper tuning in conditions of strict accuracy requirements have become a critical issue. Such BIMS, as the one designed by ELIKO Competence Centre and Artec Design LLC, is basically a complex synchronous data acquisition platform, with the base elements being a sine wave excitation signal generator, a multi-channel sampler and a DSP unit. Such a system requires full testing and calibration prior to conducting complicated and expensive biomedical experiments. Thus, the solution was selected, where the observable biological system is replaced with a digitally controlled resistance and capacitance array (DCRCA) during the testing and calibration process. DCRCA is the part of the proposed digitally controlled reference impedance device (DCRID), which emulates the behaviour of biological tissue in a determined manner. The parameter variation is supervised by a microcontroller, which enables to change properties of DCRCA with high resolution and exact timing.

Keywords

Capacitance Array Variable Resistor Float Control Reference Resistor Determined Manner 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Poola G, Toomessoo J (2007) Inherently synchronous data acquisition as a platform for bioimpedance measurement. 11th Mediterranean Conference on Medical and Biological Engineering and Computing, to be published.Google Scholar
  2. 2.
    EBI-Box and EBI-Phantom developed by MESEL at http://www.elin.ttu.ee/BME-Lab/Equipmnt/Biomedic/Google Scholar
  3. 3.
    Analog Devices, Inc. Analog switches and multiplexers at http://www.analog.comGoogle Scholar
  4. 4.
    Maxim Integrated Products, Inc. Analog switches and multiplexers at http://www.maxim-ic.comGoogle Scholar
  5. 5.
    Mayes L (2002) Using a FET as a voltage controlled resistor, 18 Oct 2002, URL: http://freespace.virgin.net/ljmayes.mal/comp/vcr.htmGoogle Scholar
  6. 6.
    Senani R (1994) Realisation of linear voltage-controlled resistance in floating form. Electronic Letters 30(23):1909-1911 10th Nov 1994CrossRefGoogle Scholar
  7. 7.
    Kushima M, Inaba M, Tanno K, Ishizuka O (2004) Design of a floating node voltage-controlled linear variable resistor circuit. Circuits and Systems, 2004. MWSCAS ’04 pp. I- 85-8 vol.1Google Scholar
  8. 8.
    Geiger R, Sánchez-Sinencio E (1985) Active filter design using operational trans-conductance amplifiers: a tutorial. IEEE Circuits and Devices Magazine 1:20-32Google Scholar
  9. 9.
    Miller J (1920) Dependence of the input impedance of a three-electrode vacuum tube upon the load in the plate circuit. Scientic Papers of the Bureau of Standards 15(351):367-385 Scanned at http://web.mit.edu/klund/www/papers/jmiller.pdfGoogle Scholar
  10. 10.
    Gumstix, Inc. at http://www.gumstix.comGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • A. Birjukov
    • 1
  • Andrei Krivoshei
    • 1
  • T. Parve
    • 1
  1. 1.Department of ElectronicsTallinn University of TechnologyTallinnEstonia

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