Fully Integrated Light-Sensing Stimulator Design for Subretinal Implants
DC Field | Value | Language |
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dc.contributor.author | Kang, Hosung | - |
dc.contributor.author | Abbasi, Wajahat H. | - |
dc.contributor.author | Kim, Seong-Woo | - |
dc.contributor.author | Kim, Jungsuk | - |
dc.date.available | 2020-02-27T04:41:41Z | - |
dc.date.created | 2020-02-05 | - |
dc.date.issued | 2019-02-01 | - |
dc.identifier.issn | 1424-8220 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1859 | - |
dc.description.abstract | This paper presents a fully integrated photodiode-based low-power and low-mismatch stimulator for a subretinal prosthesis. It is known that a subretinal prosthesis achieves 1600-pixel stimulators on a limited single-chip area that is implanted beneath the bipolar cell layer. However, the high-density pixels cause high power dissipation during stimulation and high fabrication costs because of special process technologies such as the complementary metal-oxide semiconductor CMOS image sensor process. In addition, the many residual charges arising from the high-density pixel stimulation have deleterious effects, such as tissue damage and electrode corrosion, on the retina tissue. In this work, we adopted a switched-capacitor current mirror technique for the single-pixel stimulator (SPStim) that enables low power consumption and low mismatch in the subretinal device. The customized P+/N-well photodiode used to sense the incident light in the SPStim also reduces the fabrication cost. The 64-pixel stimulators are fabricated in a standard 0.35-mu m CMOS process along with a global digital controller, which occupies a chip area of 4.3 x 3.2 mm(2) and are ex-vivo demonstrated using a dissected pig eyeball. According to measured results, the SPStim accomplishes a maximum biphasic pulse amplitude of 143 mu A, which dissipates an average power of 167 mu W in a stimulation period of 5 ms, and an average mismatch of 1.12 % between the cathodic and anodic pulses. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | MDPI | - |
dc.relation.isPartOf | SENSORS | - |
dc.subject | ELECTRICAL-STIMULATION | - |
dc.title | Fully Integrated Light-Sensing Stimulator Design for Subretinal Implants | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000459941200099 | - |
dc.identifier.doi | 10.3390/s19030536 | - |
dc.identifier.bibliographicCitation | SENSORS, v.19, no.3 | - |
dc.identifier.scopusid | 2-s2.0-85060789976 | - |
dc.citation.title | SENSORS | - |
dc.citation.volume | 19 | - |
dc.citation.number | 3 | - |
dc.contributor.affiliatedAuthor | Kim, Jungsuk | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | subretinal prosthesis | - |
dc.subject.keywordAuthor | photodiode | - |
dc.subject.keywordAuthor | high-density pixels | - |
dc.subject.keywordAuthor | ex-vivo demonstration | - |
dc.subject.keywordAuthor | light sensor | - |
dc.subject.keywordAuthor | digital controller | - |
dc.subject.keywordAuthor | implantable device | - |
dc.subject.keywordPlus | ELECTRICAL-STIMULATION | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Instruments & Instrumentation | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Analytical | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Instruments & Instrumentation | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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