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A comprehensive model for power line interference in biopotential measurements

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Fernández Chimeno, MireyaMés informacióMés informacióMés informació
Pallàs-Areny, RamonMés informacióMés informacióMés informació
Document typeArticle
Defense date2000-06-30
PublisherInstitute of Electrical and Electronics Engineers
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Power line interference is a major problem in high-resolution biopotential measurements. Because interference coupling is mostly capacitive, shielding electrode leads and a high common-mode rejection ratio (CMRR) are quite effective in reducing power-line interference but do not completely eliminate it. We propose a model that includes both interference external to the measuring system and interference coming from its internal power supply. Moreover, the model considers interference directly coupled to the measuring electrodes, because, as opposed to connecting leads, electrodes are not usually shielded. Experimental results confirm that reducing interference coupled through electrodes yields a negligible interference. The proposed model can be applied to other differential measurement systems, particulary those involving electrodes or sensors placed far apart.
CitationFernandez Chimeno, M.; Pallàs-Areny, R. A comprehensive model for power line interference in biopotential measurements. IEEE Transactions On Instrumentation And Measurement, 2000, Vol. 49, No. 3, 535-540 
URIhttp://hdl.handle.net/2117/1289
ISSN1091-5281
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