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A calibratable sensory neuron based on epitaxial VO2 for spike-based neuromorphic multisensory system
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A calibratable sensory neuron based on epitaxial VO2 for spike-based neuromorphic multisensory system
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A calibratable sensory neuron based on epitaxial VO2 for spike-based neuromorphic multisensory system
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Journal Article
A calibratable sensory neuron based on epitaxial VO2 for spike-based neuromorphic multisensory system
2022
Overview
Neuromorphic perception systems inspired by biology have tremendous potential in efficiently processing multi-sensory signals from the physical world, but a highly efficient hardware element capable of sensing and encoding multiple physical signals is still lacking. Here, we report a spike-based neuromorphic perception system consisting of calibratable artificial sensory neurons based on epitaxial VO
2
, where the high crystalline quality of VO
2
leads to significantly improved cycle-to-cycle uniformity. A calibration resistor is introduced to optimize device-to-device consistency, and to adapt the VO
2
neuron to different sensors with varied resistance level, a scaling resistor is further incorporated, demonstrating cross-sensory neuromorphic perception component that can encode illuminance, temperature, pressure and curvature signals into spikes. These components are utilized to monitor the curvatures of fingers, thereby achieving hand gesture classification. This study addresses the fundamental cycle-to-cycle and device-to-device variation issues of sensory neurons, therefore promoting the construction of neuromorphic perception systems for e-skin and neurorobotics.
A highly efficient hardware element capable of sensing and encoding multiple physical signals is still lacking. Here, the authors report a spike-based neuromorphic perception system consisting of tunable and highly uniform artificial sensory neurons based on epitaxial VO
2
capable of hand gesture classification.
