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A Low-Stimulus-Scattering Pixel-Sharing Sub-Retinal Prosthesis SoC With Time-Bas
提出一种低刺激散射的像素共享亚视网膜假体SoC，采用模块化主动/返回电极方案和时间基光电二极管传感技术。
505通道，0.01mm²/像素，动态范围35.8dB，能耗降低64%
视网膜假体像素共享电流散射动态范围动态电压缩放
▸模块化主动/返回电极方案减少电流散射
▸时间基光电二极管传感提高动态范围
▸像素级动态电压缩放降低能耗
Abstract
This article proposes a 505-channel pixel-sharing
sub-retinal prosthesis (PSRP) system-on-chip (SoC) that aims
to effectively restore patients’ visual acuity using the modular
active/return electrode (Mod-A/R) scheme to mitigate current
scattering and time-based photodiode (T-PD) sensing to increase
the dynamic range (DR) of light sensing. To improve stimulation
efficiency, the PSRP SoC adopts per-pixel dynamic voltage scaling
(DVS) that can adaptively select different optimal supply voltages
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