University of Sussex

File(s) not publicly available

Optimal device for a low output impedance voltage source for Electrical Impedance Tomography (EIT) systems

posted on 2023-06-08, 12:18 authored by Tabassum-Ur-Razaq Qureshi, B Mehboob, Chris ChatwinChris Chatwin, W Wang
The key component in bio-impedance measurement systems is an excitation source. Electrical Impedance Tomography (EIT) 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. A viable bandwidth envelope that can be used to design a constant EIT source having low output impedance is the main objective of this research. This paper proposes a voltage controlled voltage source (VCVS) tested by using different nonideal devices. The performance is compared with each other and decision is made which device can be used over a wide bandwidth (100Hz-20MHz) to design an excitation source. This paper also describes the performance of the designed EIT voltage source for different load conditions and load capacitances reporting signal-to-noise ratio, signal phase and output impedance of the source. Preliminary data obtained using Pspice is used to demonstrate the high-bandwidth performance of the source.


Publication status

  • Published



Page range


Event name

2012 IEEE International Conference on Electro/Information Technology, EIT 2012;Indianapolis, IN;6 May 2012through8 May

Event location

Indianapolis, USA

Event type


Event date

6/5/12 to 8/5/12

Book title

Electro/Information Technology (EIT), 2012 IEEE International Conference on



Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date


Usage metrics

    University of Sussex (Publications)


    No categories selected