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The influence of distance between the electrode and noise reduction buffer amplifiers in ECG monitoring using knitted electrodes

The influence of distance between the electrode and noise reduction buffer amplifiers in ECG monitoring using knitted electrodes
The influence of distance between the electrode and noise reduction buffer amplifiers in ECG monitoring using knitted electrodes
Knitted electrodes provide numerous advantages over the gel electrodes typically used in clinical practice when designing wearable Electrocardiogram (ECG) systems. They typically have enhanced durability, better textile integration and do not dry out. However, the higher skin/electrode impedance makes them susceptible to noise from electrical interference. Adding a buffer amplifier circuit close to the electrode, creating an ‘active’ electrode, is one way to mitigate this. However, the choice of where to integrate these amplifiers in the garment remains. Therefore, this work measured the signal-to-noise ratio (SNR) of an ECG output when comparing the distance between the electrode and the operational amplifier (op-amp) buffer and found that when the buffer was placed directly under a knitted electrode, the noise was lower than that seen with gel electrodes. This also provided information on the impact of distance on the SNR.
ECG, active electrodes, electrography, health monitoring, knitted electrode
2673-4591
Greig, Tom
d54c6aa7-3583-41fa-88b0-d339f06a3fb9
Jopling, Kate
08668ed1-4c82-4c42-872f-7924acc21de2
Irving, Zackery
40445241-6d7e-4740-8d03-74aaa67432c3
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Perry, Helen
d15b2c72-6b05-4d42-af6e-9861b0b28778
Cheong, Ying
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Torah, Russel
7147b47b-db01-4124-95dc-90d6a9842688
Yang, Kai
f1c9b81d-e821-47eb-a69e-b3bc419de9c7
Greig, Tom
d54c6aa7-3583-41fa-88b0-d339f06a3fb9
Jopling, Kate
08668ed1-4c82-4c42-872f-7924acc21de2
Irving, Zackery
40445241-6d7e-4740-8d03-74aaa67432c3
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Perry, Helen
d15b2c72-6b05-4d42-af6e-9861b0b28778
Cheong, Ying
4efbba2a-3036-4dce-82f1-8b4017952c83
Torah, Russel
7147b47b-db01-4124-95dc-90d6a9842688
Yang, Kai
f1c9b81d-e821-47eb-a69e-b3bc419de9c7

Greig, Tom, Jopling, Kate, Irving, Zackery, Altamirano, Diego, Perry, Helen, Cheong, Ying, Torah, Russel and Yang, Kai (2024) The influence of distance between the electrode and noise reduction buffer amplifiers in ECG monitoring using knitted electrodes. Engineering Proceedings, 52 (1), [20]. (doi:10.3390/engproc2023052020).

Record type: Article

Abstract

Knitted electrodes provide numerous advantages over the gel electrodes typically used in clinical practice when designing wearable Electrocardiogram (ECG) systems. They typically have enhanced durability, better textile integration and do not dry out. However, the higher skin/electrode impedance makes them susceptible to noise from electrical interference. Adding a buffer amplifier circuit close to the electrode, creating an ‘active’ electrode, is one way to mitigate this. However, the choice of where to integrate these amplifiers in the garment remains. Therefore, this work measured the signal-to-noise ratio (SNR) of an ECG output when comparing the distance between the electrode and the operational amplifier (op-amp) buffer and found that when the buffer was placed directly under a knitted electrode, the noise was lower than that seen with gel electrodes. This also provided information on the impact of distance on the SNR.

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engproc-52-00020 - Version of Record
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Published date: 24 January 2024
Additional Information: Publisher Copyright: © 2024 by the authors.
Keywords: ECG, active electrodes, electrography, health monitoring, knitted electrode

Identifiers

Local EPrints ID: 486530
URI: http://eprints.soton.ac.uk/id/eprint/486530
ISSN: 2673-4591
PURE UUID: 5c2963ba-0deb-4d74-ac2f-4315912e4802
ORCID for Tom Greig: ORCID iD orcid.org/0000-0003-2745-235X
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074
ORCID for Ying Cheong: ORCID iD orcid.org/0000-0001-7687-4597
ORCID for Russel Torah: ORCID iD orcid.org/0000-0002-5598-2860
ORCID for Kai Yang: ORCID iD orcid.org/0000-0001-7497-3911

Catalogue record

Date deposited: 25 Jan 2024 17:33
Last modified: 05 Oct 2024 02:16

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Contributors

Author: Tom Greig ORCID iD
Author: Kate Jopling
Author: Zackery Irving
Author: Helen Perry
Author: Ying Cheong ORCID iD
Author: Russel Torah ORCID iD
Author: Kai Yang ORCID iD

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