[18p-W2_401-1~11] 12.7 Biomedical Engineering and Biochips

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18p-W2_401-9] High Speed Voltage Compensation for Parallel Retinal Prosthesis Stimulation

〇KuanHsun Chen¹, Wisaroot Sriitsaranusorn¹, Nakanishi Yuki¹, KuangChih Tso¹, Kenzo Shodo², Yasuo Terasawa^1,2, Yoshinori Sunaga¹, Makito Haruta^1,3, Hiroyuki Tashiro^1,4, Okada Ryoma¹, Jun Ohta¹, Kiyotaka Sasagawa¹ (1.NAIST, 2.Nidek Co. LTD, 3.Chitose Inst. of Sci. and Tech, 4.Kyushu Univ)

Keywords:

semiconductor integrated circuits,Retinal Prosthesis,Bio-implantable devices

In this study, we constructed a high-speed feedback system using a CMOS chip for artificial vision equipped with a power supply voltage monitoring circuit and an FPGA, achieving dynamic compensation for voltage droop in platinum (Pt) wiring. This system incorporates a buffer circuit within the chip and employs high-speed control via the FPGA, preventing voltage shortages in the chip even during multi-point constant-current stimulation and enabling stable power supply. Functional verification demonstrated that the compensation operation was approximately 8 to 9 times faster than our previous system.