Title:	Hardware imitation of the varying bioelectrical impedance for testing the device for measurement of the impedance of human trunk by using a JFET
Authors:	Metshein, Margus
Citation:	2016 International Conference on Applied Electronics: Pilsen, 6th – 7th September 2016, Czech Republic, p.173-176.
Issue Date:	2016
Publisher:	Západočeská univerzita v Plzni
Document type:	konferenční příspěvek conferenceObject
URI:	http://hdl.handle.net/11025/35240
ISBN:	978–80–261–0601–2 (Print) 978–80–261–0602–9 (Online)
ISSN:	1803–7232 (Print) 1805–9597 (Online)
Keywords:	měření napětí;měření proudu;tranzistor JFET;rezistory;impedance;měření frekvence
Keywords in different language:	voltage measurement;current measurement;JFETs;resistors;impedance;frequency measurement
Abstract in different language:	In this paper an approach of imitating the periodically varying electrical bioimpedance of human trunk in case of breathing by using a field effect transistor is presented. The principles of creating a simulation model and preparing a prototype of electronic measurement device, are described. The experiments are presented and the results are compared concerning the change of channel resistance of the field effect transistor and change of real part of impedance of trunk, caused by breathing. The problems of high frequency capacitive measurements and the impact on the design of electronic measurement device are discussed. The results are showing the possibility of using a field effect transistor for imitating breathing. This is a most suitable way of simulation because of the relatively high operating frequency of impedance measurement device needed in the case of using the capacitive electrodes.
Rights:	© Západočeská univerzita v Plzni
Appears in Collections:	Applied Electronics 2016 Applied Electronics 2016

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