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Analog Realization of Fractional-Order Skin-Electrode Model for Tetrapolar Bio-Impedance Measurements

Department of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece
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Received: 21 September 2020 / Revised: 17 October 2020 / Accepted: 26 October 2020 / Published: 2 November 2020
This work compares two design methodologies, emulating both AgCl electrode and skin tissue Cole models for testing and verification of electrical bio-impedance circuits and systems. The models are based on fractional-order elements, are implemented with active components, and capture bio-impedance behaviors up to 10 kHz. Contrary to passive-elements realizations, both architectures using analog filters coupled with adjustable transconductors offer tunability of the fractional capacitors’ parameters. The main objective is to build a tunable active integrated circuitry block that is able to approximate the models’ behavior and can be utilized as a Subject Under Test (SUT) and electrode equivalent in bio-impedance measurement applications. A tetrapolar impedance setup, typical in bio-impedance measurements, is used to demonstrate the performance and accuracy of the presented architectures via Spectre Monte-Carlo simulation. Circuit and post-layout simulations are carried out in 90-nm CMOS process, using the Cadence IC suite. View Full-Text
Keywords: tetrapolar measurement; bio-impedance; analog integrated circuits; fractional-order models; electrode; skin tetrapolar measurement; bio-impedance; analog integrated circuits; fractional-order models; electrode; skin
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MDPI and ACS Style

Alimisis, V.; Dimas, C.; Pappas, G.; Sotiriadis, P.P. Analog Realization of Fractional-Order Skin-Electrode Model for Tetrapolar Bio-Impedance Measurements. Technologies 2020, 8, 61. https://0-doi-org.brum.beds.ac.uk/10.3390/technologies8040061

AMA Style

Alimisis V, Dimas C, Pappas G, Sotiriadis PP. Analog Realization of Fractional-Order Skin-Electrode Model for Tetrapolar Bio-Impedance Measurements. Technologies. 2020; 8(4):61. https://0-doi-org.brum.beds.ac.uk/10.3390/technologies8040061

Chicago/Turabian Style

Alimisis, Vassilis, Christos Dimas, Georgios Pappas, and Paul P. Sotiriadis 2020. "Analog Realization of Fractional-Order Skin-Electrode Model for Tetrapolar Bio-Impedance Measurements" Technologies 8, no. 4: 61. https://0-doi-org.brum.beds.ac.uk/10.3390/technologies8040061

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