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research article
Continuous monitoring of electrode-skin impedance mismatch during bioelectric recordings
Degen, Thomas
•
Jaeckel, Heinz
In bioelectric recordings, an electrode-skin impedance mismatch leads to a reduced common-mode rejection ratio (CMRR) of the amplifier. For this reason, the impedance of each individual electrode-skin contact is usually measured prior to a recording. The measurement circuit itself degrades the CMRR and is switched off during the bioelectric recording. In this paper, we present a new method that allows to monitor the electrode-skin impedance in a continuous way without reducing the CMRR of the amplifier. The new method is based on an additional common-mode signal that is superimposed on the bioelectric signal.
Type
research article
Web of Science ID
WOS:000256153900008
Authors
Degen, Thomas
•
Jaeckel, Heinz
Publication date
2008
Published in
Volume
55
Start page
1711
End page
1715
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 30, 2010
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