High output-impedance current source for electrical impedance tomography

Author

Zhao, Dechun

Author_Institution

Coll. of Bio-Inf., Chongqing Univ. of Posts & Telecommun., Chongqing, China

Volume

2

fYear

2011

fDate

15-17 Oct. 2011

Firstpage

1106

Lastpage

1109

Abstract

This paper emphasized on analyzing the frequency-domain and the time-domain characteristic of the enhanced Howland circuit for electrical impedance tomography, and studied the influencing factor in depth. Firstly, the output current, impedance and their influencing factors were discussed in detail by numerical simulation. Secondly, it simulated the frequency characteristic of current source, and finally, designed the experiment to measure the output current and impedance. Simulation and experiment indicated that it could improve the performance by selecting the suitable amplifier, peripheral components to meet requirements of electrical impedance tomography.

Keywords

amplifiers; electric impedance imaging; frequency-domain analysis; numerical analysis; time-domain analysis; amplifier; electrical impedance tomography; enhanced Rowland circuit; frequency-domain characteristic; high output-impedance current source; numerical simulation; peripheral component; time-domain characteristic; Current measurement; Educational institutions; Frequency domain analysis; Impedance; Resistors; Tomography; Electrical impedance tomography (EIT); current source; output impedance;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-9351-7

Type

conf

DOI

10.1109/BMEI.2011.6098486

Filename

6098486