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CMOS-Based Multichip Networked Flexible Retinal Stimulator Designed for Image-Based Retinal Prosthesis

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10 Author(s)
Takashi Tokuda ; Grad. Sch. of Mater. Sci., Nara Inst. of Sci. & Technol., Ikoma, Japan ; Kohei Hiyama ; Shigeki Sawamura ; Kiyotaka Sasagawa
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We propose and characterize a CMOS LSI-based neural stimulator for retinal prosthesis technology. The stimulator is based upon a multichip architecture in which small-sized CMOS stimulators named ldquounit chipsrdquo are organized on a flexible substrate. We designed a unit chip with an on-chip stimulator and light-sensing circuitry. We verified that all the functions implemented on the unit chip worked correctly and that an organized unit chip can be used as a retinal stimulator with multisite image-based patterned stimulation. We also demonstrated light-controlled retinal stimulation for the first time in an in vivo animal experiment on a rabbit's retina.

Published in:

IEEE Transactions on Electron Devices  (Volume:56 ,  Issue: 11 )