当前位置:
X-MOL 学术
›
IEEE Trans. Biomed. Circuits Syst.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
1225-Channel Neuromorphic Retinal-Prosthesis SoC With Localized Temperature-Regulation
IEEE Transactions on Biomedical Circuits and Systems ( IF 5.1 ) Pub Date : 2020-11-06 , DOI: 10.1109/tbcas.2020.3036091 Jeong Hoan Park , Joanne Si Ying Tan , Han Wu , Yilong Dong , Jerald Yoo
IEEE Transactions on Biomedical Circuits and Systems ( IF 5.1 ) Pub Date : 2020-11-06 , DOI: 10.1109/tbcas.2020.3036091 Jeong Hoan Park , Joanne Si Ying Tan , Han Wu , Yilong Dong , Jerald Yoo
A 1225-Channel Neuromorphic Retinal Prosthesis (RP) SoC is presented. Existing RP SoCs directly convert light intensity to electrical stimulus, which limit the adoption of delicate stimulus patterns to increase visual acuity. Moreover, a conventional centralized image processor leads to the local hot spot that poses a risk to the nearby retinal cells. To solve these issues, the proposed SoC adopts a distributed Neuromorphic Image Processor (NMIP) located within each pixel that extracts the outline of the incoming image, which reduces current dispersion and stimulus power compared with light-intensity proportional stimulus pattern. A spike-based asynchronous digital operation results in the power consumption of 56.3 nW/Ch without local temperature hot spot. At every 5×5 pixels, the localized (49-point) temperature-regulation circuit limits the temperature increase of neighboring retinal cells to less than 1 °C, and the overall power consumption of the SoC to be less than that of the human eye. The 1225-channel SoC fabricated in 0.18 μm 1P6M CMOS occupies 15mm
2 while consuming 2.7 mW, and is successfully verified with image reconstruction demonstration.
中文翻译:
具有局部温度调节功能的 1225 通道神经形态视网膜假体 SoC
展示了 1225 通道神经形态视网膜假体 (RP) SoC。现有的 RP SoC 直接将光强度转换为电刺激,这限制了采用精细刺激模式来提高视力。此外,传统的中央图像处理器会导致局部热点,对附近的视网膜细胞构成风险。为了解决这些问题,所提出的 SoC 采用了位于每个像素内的分布式神经形态图像处理器 (NMIP),用于提取传入图像的轮廓,与光强度成比例的刺激模式相比,它降低了电流色散和刺激功率。基于尖峰的异步数字操作导致 56.3 nW/Ch 的功耗,没有局部温度热点。每 5×5 个像素,局部(49点)温度调节电路将邻近视网膜细胞的温升限制在1°C以下,SoC的整体功耗小于人眼的功耗。采用 0.18 μm 1P6M CMOS 制造的 1225 通道 SoC 占用 15mm 2,同时消耗 2.7 mW,并通过图像重建演示成功验证。
更新日期:2021-01-01
中文翻译:
具有局部温度调节功能的 1225 通道神经形态视网膜假体 SoC
展示了 1225 通道神经形态视网膜假体 (RP) SoC。现有的 RP SoC 直接将光强度转换为电刺激,这限制了采用精细刺激模式来提高视力。此外,传统的中央图像处理器会导致局部热点,对附近的视网膜细胞构成风险。为了解决这些问题,所提出的 SoC 采用了位于每个像素内的分布式神经形态图像处理器 (NMIP),用于提取传入图像的轮廓,与光强度成比例的刺激模式相比,它降低了电流色散和刺激功率。基于尖峰的异步数字操作导致 56.3 nW/Ch 的功耗,没有局部温度热点。每 5×5 个像素,局部(49点)温度调节电路将邻近视网膜细胞的温升限制在1°C以下,SoC的整体功耗小于人眼的功耗。采用 0.18 μm 1P6M CMOS 制造的 1225 通道 SoC 占用 15mm 2,同时消耗 2.7 mW,并通过图像重建演示成功验证。