A retinal neuroprosthesis design based on simultaneous current injection

N. H. Lovell, S. Dokos, P. Preston, T. Lehmann, N. Dommel, A. Lin, Y. T. Wong, N. Opie, I. E. Hallum, S. Chen, G. J. Suaning

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

14 Citations (Scopus)

Abstract

We present an epiretinal neuroprosthesis design based on a hexagonally-latticed 98 electrode array and the capacity to multiplex up to 14 simultaneous current sources. The digital and analogue electronics required to perform this function and how this would be incorporated into an application specific integrated circuit (ASIC) are described. Simulation data and data from saline bath testing of a platinum/silicone electrode array (and associated driving electronics) are presented. Simulations were performed using a 2D computational model solved using a custom collocation method. The guarding affect of the hexagonal array is investigated and shown in simple simulations to be an approach worthy of further investigation.

Original languageEnglish
Title of host publication2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
Pages98-101
Number of pages4
Volume2005
DOIs
Publication statusPublished - 2005
Externally publishedYes
Event2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology - Oahu, HI, United States of America
Duration: 12 May 200515 May 2005

Conference

Conference2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
CountryUnited States of America
CityOahu, HI
Period12/05/0515/05/05

Keywords

  • ASIC
  • Current source
  • Electrode array
  • Modeling
  • Neurostimulation
  • Retina
  • Vision prosthesis

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