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Zhang, Xumeng; Zhuo, Ye; Luo, Qing; Wu, Zuheng; Midya, Rivu; Wang, Zhongrui; Song, Wenhao; Wang, Rui; Upadhyay, Navnidhi K; Fang, Yilin; Kiani, Fatemeh; Rao, Mingyi; Yang, Yang; Xia, Qiangfei; Liu, Qi; Liu, Ming; Yang, J Joshua
Nature communications, 01/2020, Volume: 11, Issue: 1Journal Article
Neuromorphic computing based on spikes offers great potential in highly efficient computing paradigms. Recently, several hardware implementations of spiking neural networks based on traditional complementary metal-oxide semiconductor technology or memristors have been developed. However, an interface (called an afferent nerve in biology) with the environment, which converts the analog signal from sensors into spikes in spiking neural networks, is yet to be demonstrated. Here we propose and experimentally demonstrate an artificial spiking afferent nerve based on highly reliable NbO Mott memristors for the first time. The spiking frequency of the afferent nerve is proportional to the stimuli intensity before encountering noxiously high stimuli, and then starts to reduce the spiking frequency at an inflection point. Using this afferent nerve, we further build a power-free spiking mechanoreceptor system with a passive piezoelectric device as the tactile sensor. The experimental results indicate that our afferent nerve is promising for constructing self-aware neurorobotics in the future.
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