[16p-K403-1~13] 12.7 Biomedical Engineering and Biochips

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16p-K403-12] Efficient Retinal Prosthesis Chip Voltage Compensation for Parallel Stimulation

〇KuanHsun Chen¹, Takaya Hattori¹, Wisaroot Sriitsaranusorn¹, Nakanishi Yuki¹, KuangChih Tso¹, Shodo Kenzo^1,2, Yasuo Terasawa^1,2, Yoshinori Sunaga¹, Makito Haruta^1,3, 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 circuits,Retinal Prosthesis,Bio-implantable devices

In this study, we designed and verified a new power voltage monitor circuit to achieve efficient voltage recovery in response to the voltage drop occurring during parallel stimulation, which is necessary for improving the resolution of artificial vision devices. By introducing three-stage voltage detection using two Schmitt trigger inverters with different threshold voltages, we aimed to shorten the recovery time. The simulation results showed that, under conditions assuming parallel stimulation from 150 chips, the voltage recovery time was reduced by 50% compared to conventional methods, with a recovery time of 4 μs estimated.