On the application of frequency selective common mode feedback for multifrequency EIT
Article
Langlois, P., Wu, Y., Bayford, R. and Demosthenous, A. 2015. On the application of frequency selective common mode feedback for multifrequency EIT. Physiological Measurement. 36 (6), pp. 1337-1350. https://doi.org/10.1088/0967-3334/36/6/1337
Type | Article |
---|---|
Title | On the application of frequency selective common mode feedback for multifrequency EIT |
Authors | Langlois, P., Wu, Y., Bayford, R. and Demosthenous, A. |
Abstract | Common mode voltages are frequently a problem in electrical impedance tomography (EIT) and other bioimpedance applications. To reduce their amplitude common mode feedback is employed. Formalised analyses of both current and voltage feedback is presented in this paper for current drives. Common mode effects due to imbalances caused by the current drives, the electrode connections to the body load and the introduction of the body impedance to ground are considered. Frequency selective narrowband common mode feedback previously proposed to provide feedback stability is examined. As a step towards multifrequency applications the use of narrowband feedback is experimentally demonstrated for two simultaneous current drives. Measured results using standard available components show a reduction of 62dB for current feedback and 31dB for voltage feedback. Frequencies ranged from 50 kHz to 1 MHz. |
Research Group | Biophysics and Bioengineering group |
Publisher | IoP |
Journal | Physiological Measurement |
ISSN | 0967-3334 |
Publication dates | |
26 May 2015 | |
Publication process dates | |
Deposited | 07 May 2015 |
Submitted | 06 Jan 2015 |
Accepted | 10 Feb 2015 |
Output status | Published |
Publisher's version | File Access Level Open |
Copyright Statement | © 2015 Institute of Physics and Engineering in Medicine |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0967-3334/36/6/1337 |
Language | English |
https://repository.mdx.ac.uk/item/85439
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