Spiking neurons with spatiotemporal dynamics and gain modulation for monolithically integrated memristive neural networks

Qingxi Duan, Zhaokun Jing, Xiaolong Zou, Yanghao Wang, Ke Yang, Teng Zhang, Si Wu, Ru Huang () and Yuchao Yang ()
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Qingxi Duan: Peking University
Zhaokun Jing: Peking University
Xiaolong Zou: Peking University
Yanghao Wang: Peking University
Ke Yang: Peking University
Teng Zhang: Peking University
Si Wu: Peking University
Ru Huang: Peking University
Yuchao Yang: Peking University

Nature Communications, 2020, vol. 11, issue 1, 1-13

Abstract: Abstract As a key building block of biological cortex, neurons are powerful information processing units and can achieve highly complex nonlinear computations even in individual cells. Hardware implementation of artificial neurons with similar capability is of great significance for the construction of intelligent, neuromorphic systems. Here, we demonstrate an artificial neuron based on NbOx volatile memristor that not only realizes traditional all-or-nothing, threshold-driven spiking and spatiotemporal integration, but also enables dynamic logic including XOR function that is not linearly separable and multiplicative gain modulation among different dendritic inputs, therefore surpassing neuronal functions described by a simple point neuron model. A monolithically integrated 4 × 4 fully memristive neural network consisting of volatile NbOx memristor based neurons and nonvolatile TaOx memristor based synapses in a single crossbar array is experimentally demonstrated, showing capability in pattern recognition through online learning using a simplified δ-rule and coincidence detection, which paves the way for bio-inspired intelligent systems.

Date: 2020
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DOI: 10.1038/s41467-020-17215-3

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