[17p-C31-1~20] 12.7 Biomedical Engineering and Biochips

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17p-C31-15] Design of Artificial Vision Chip Voltage Compensation System for Multipoint Stimulation

〇(M2)Takaya Hattori¹, Wisaroot Sriitsaranusorn¹, Yuki Nakanishi¹, Kuang-Chih Tso¹, Kenzo Shodo², Yasuo Terasawa^1,2, Yoshinori Sunaga¹, Makito Haruta^1,3, Hironari Takehara¹, Hiroyuki Tashiro^1,4, Jun Ohta¹, Kiyotaka Sasagawa¹ (1.NAIST, 2.Nidek Co. LTD, 3.Chitose Inst. of Sci. and Tech., 4.Kyushu Univ.)

Keywords:

semiconductor integrated circuit,artificial vision,Bio-implantable device

In this study, we designed and functionally verified a system that can supply sufficient power supply voltage during multi-point constant-current stimulation using CMOS chips for retinal prosthesis. Each chip is equipped with a power supply voltage monitoring circuit that feeds back the power supply voltage to the controller. The system dynamically compensates for the voltage drop associated with the amount of current in the Pt wiring connecting the control device outside the eye and the stimulation device implanted in the eye in a very short time, and solves the problem of the CMOS chip in the stimulation device falling below the voltage required for constant-current stimulation.