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Characterisation of a multi-channel multiplexed EMG recording system: towards realising variable electrode configurations

Jager, KD; Mentink, M; Lancashire, H; Al-Ajam, Y; Taylor, S; Vanhoestenberghe, A; (2019) Characterisation of a multi-channel multiplexed EMG recording system: towards realising variable electrode configurations. In: 2019 IEEE Biomedical Circuits and Systems Conference (BioCAS). IEEE: Nara, Japan. Green open access

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Abstract

An implantable EMG amplifier with a novel multiplexed frontend for in vivo selection of optimal electrode configurations, was designed using commercially available components. The multiplexers are advantageous as optimal electrode configuration are not known before implantation. The system has 6 ADC recording channels (ADS1298 biopotential amplifier, 2 kHz sampling frequency, 16-bit resolution), and three 8 × 8 multiplexer arrays (ADG2188), 2 channels per MUX. The system was characterised by measuring input impedance (5.8 MOhm) and frequency response (CMRR 49.0 dB; SNR 51.4 dB). EMG recordings from implanted epimysial electrodes showed lower signal quality (13.5 dB) compared with a commercial EMG recorder (19.5 dB), nonetheless the signals appeared suitable for myoelectric control applications. An implantable version of the EMG recorder, housed within a hermetically sealed ceramic package, should improve signal quality.

Type: Proceedings paper
Title: Characterisation of a multi-channel multiplexed EMG recording system: towards realising variable electrode configurations
Event: 2019 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Dates: 17 October 2019 - 19 October 2019
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/biocas.2019.8918710
Publisher version: https://doi.org/10.1109/biocas.2019.8918710
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Biopotential recordings, electromyography, electrode array, bipolar, tripolar, monopolar, implantable electronics.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10087638
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