A new light-activated CMOS retinal-pulse generation circuit without external power supply for artificial retinal prostheses

Chung-Yu Wu*, Li Ju Lin, Kuan Hsun Huang

*Corresponding author for this work

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

3 Scopus citations

Abstract

A new approach to implement the artificial retinal prosthesis using the silicon retina chip is proposed in this paper. In the proposed new approach, a new light-activated CMOS retinal pulse generation circuit is designed by using the gate-controlled lateral npn and pnp bipolar junction transistors (BJTs) to form the new BJT-based silicon retina structure. With the BJT served as a photovoltaic device, which generates power under incident light, the designed circuit does not require external power supply. Moreover, the proposed new circuit can hnction as photoreceptors, horizontal cells, and bipolar cells of the real vertebrate retina to generate retinal pulses under moving object or flash light image. Both static and dynamic functions of the proposed circuit have been verified by using HSPICE simulation. An experimental chip with 32×32 silicon retina cell array is designed by using 0.25μm one-poly-five-metal CMOS technology with deep n-wells. The chip will be implanted to eyes in animal tests.

Original languageEnglish
Title of host publicationICECS 2001 - 8th IEEE International Conference on Electronics, Circuits and Systems
Pages619-622
Number of pages4
DOIs
StatePublished - 1 Dec 2001
Event8th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2001 - , Malta
Duration: 2 Sep 20015 Sep 2001

Publication series

NameProceedings of the IEEE International Conference on Electronics, Circuits, and Systems
Volume2

Conference

Conference8th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2001
CountryMalta
Period2/09/015/09/01

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