Document Detail

Noise characteristics of stainless-steel surface electrodes.
MedLine Citation:
PMID:  1813753     Owner:  NLM     Status:  MEDLINE    
Bioelectric events measured with surface electrodes are subject to noise components which may be significant in comparison with low-level biological signals such as evoked neuroelectric potentials, and myoelectric potentials. In an effort to better understand noise arising from these electrodes, electrode and measurement system noise is modelled. The effect of electrode surface area on electrode impedance and noise is studied using circular stainless-steel electrodes of varying diameters. The main contributions of the work are the development of a model for stainless-steel electrode noise as a function of electrode area, and demonstrating that, for the band-width of interest to evoked neuroelectric and myoelectric signals (8-10,000 Hz), the primary noise components are thermal and amplifier current generated. The magnitudes of both of these depend on the electrode impedance magnitude. Electrode impedance is shown to be a power function of both electrode diameter and frequency, consistent with a capacitive electrode model.
D T Godin; P A Parker; R N Scott
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medical & biological engineering & computing     Volume:  29     ISSN:  0140-0118     ISO Abbreviation:  Med Biol Eng Comput     Publication Date:  1991 Nov 
Date Detail:
Created Date:  1992-06-18     Completed Date:  1992-06-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7704869     Medline TA:  Med Biol Eng Comput     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  585-90     Citation Subset:  IM    
Electrical Engineering Department, University of New Brunswick, Canada.
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MeSH Terms
Electric Conductivity
Electrophysiology / instrumentation
Stainless Steel
Reg. No./Substance:
12597-68-1/Stainless Steel

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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