A comprehensive model for power line interference in biopotential measurements
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hdl:2117/1289
Tipus de documentArticle
Data publicació2000-06-30
EditorInstitute of Electrical and Electronics Engineers
Condicions d'accésAccés obert
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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.
CitacióFernandez 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
ISSN1091-5281
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RPallas_article_2000_1C.pdf | 106Kb | Visualitza/Obre |