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Design Considerations for Ground Referencing in Multi - Module Neural Implants

Haci, D; Liu, Y; Ghoreishizadeh, SS; Constandinou, TG; (2018) Design Considerations for Ground Referencing in Multi - Module Neural Implants. In: 2018 IEEE Biomedical Circuits and Systems Conference (BioCAS). IEEE Green open access

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Abstract

Implantable neural interfaces have evolved in the past decades from stimulation-only devices to closed-loop recording and stimulation systems, allowing both for more targeted therapeutic techniques and more advanced prosthetic implants. Emerging applications require multi-module active implantable devices with intrabody power and data transmission. This distributed approach poses a new set of challenges related to inter-module connectivity, functional reliability and patient safety. This paper addresses the ground referencing challenge in active multi-implant systems, with a particular focus on neural recording devices. Three different grounding schemes (passive, drive, and sense) are presented and evaluated in terms of both recording reliability and patient safety. Considerations on the practical implementation of body potential referencing circuitry are finally discussed, with a detailed analysis of their impact on the recording performance.

Type: Proceedings paper
Title: Design Considerations for Ground Referencing in Multi - Module Neural Implants
Event: IEEE Biomedical Circuits and Systems Conference (BioCAS), 17-19 October 2018, Cleveland, OH, USA
ISBN-13: 9781538636039
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/BIOCAS.2018.8584708
Publisher version: https://doi.org/10.1109/BIOCAS.2018.8584708
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: Electrodes , Electric potential , Safety , Rails , Neural implants , Reliability
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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 Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10068773
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