| DOI | Resolve DOI: https://doi.org/10.1002/adbi.202000055 |
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| Author | Search for: Ahnood, ArmanORCID identifier: https://orcid.org/0000-0002-0253-7579; Search for: Cheriton, Ross1; Search for: Bruneau, Anne; Search for: Belcourt, James A.; Search for: Ndabakuranye, Jean Pierre; Search for: Lemaire, William; Search for: Hilkes, Rob; Search for: Fontaine, Réjean; Search for: Cook, John P. D.; Search for: Hinzer, Karin; Search for: Prawer, Steven |
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| Affiliation | - National Research Council of Canada. Advanced Electronics and Photonics
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| Funder | Search for: Australian Research Council; Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Abstract | The design and benchtop operation of a wireless miniature epiretinal stimulator implant is reported. The implant is optically powered and controlled using safe illumination at near-infrared wavelengths. An application-specific integrated circuit (ASIC) hosting a digital control unit is used to control the implant's electrodes. The ASIC is powered using an advanced photovoltaic (PV) cell and programmed using a single photodiode. Diamond packaging technology is utilized to achieve high-density integration of the implant optoelectronic circuitry, as well as individual connections between a stimulator chip and 256 electrodes, within a 4.6 mm × 3.7 mm × 0.9 mm implant package. An ultrahigh efficiency PV cell with a monochromatic power conversion efficiency of 55% is used to power the implant. On-board photodetection circuity with a bandwidth of 3.7 MHz is used for forward data telemetry of stimulation parameters. In comparison to implants which utilize inductively coupled coils, laser power delivery enables a high degree of miniaturization and lower surgical complexity. The device presented combines the benefits of implant miniaturization and a flexible stimulation strategy provided by a dedicated stimulator chip. This development provides a route to fully wireless miniaturized minimally invasive implants with sophisticated functionalities. |
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| Publication date | 2020-11 |
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| Publisher | Wiley |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 0d19fc06-8313-4cc1-9244-834880beda7a |
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| Record created | 2022-05-03 |
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| Record modified | 2022-05-03 |
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