Wideband voltage source design for EIT systems

Qureshi, T R, Mehboob, B, Chatwin, C R and Wang, W (2012) Wideband voltage source design for EIT systems. In: Bioengineering Conference (NEBEC), 2012 38th Annual Northeast. IEEE, pp. 353-354. ISBN 9781467311410

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Abstract

The excitation source is a major component in bio-impedance measurement systems. Electrical Impedance Tomography can be performed by injecting current and measuring the resulting voltages, or by applying voltages and measuring the current developed. Interesting characteristics of breast tissues mostly lie above 1MHz; therefore a wideband excitation source covering higher frequencies (i.e. above 1MHz) is required. This paper proposes a voltage controlled voltage source (VCVS), which can be used over a wide bandwidth (100Hz-20MHz). This paper describes the performance of the designed EIT voltage source for different load conditions and load capacitances. The objective of this research is to establish a viable bandwidth envelope that can be used to design a constant EIT voltage source over a wide bandwidth for practical implementation. Simulation data obtained using Pspice is used to demonstrate the high-bandwidth performance of the source.

Item Type: Book Section
Keywords: Bioimpedance measurement; Breast tissues; Electrical impedance tomography; Excitation sources; High bandwidth; Higher frequencies; Load capacitance; Load condition; Practical implementation; Simulation data; Voltage controlled voltage sources; Voltage source; Wide bandwidth; Wide-band; Wideband excitation
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QA Mathematics
Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
R Medicine > R Medicine (General) > R856 Biomedical engineering. Electronics. Instrumentation
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics
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Depositing User: Chris Chatwin
Date Deposited: 30 Aug 2012 08:46
Last Modified: 30 Aug 2012 08:47
URI: http://sro.sussex.ac.uk/id/eprint/40502
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