A novel memristive synapse model based on the HP memristor is proposed in this paper, which can address the problem of synaptic weight infinite modulations. The sliding threshold mechanism of the Bienenstock-Cooper-Munro rule (BCM) is used to redefine the memristance (i.e. synaptic weight) adjustment process of the memristive synapse model. Based on the proposed memristor-based synapse and Leaky Integrate-and-Fire neurons, a spiking neural network (SNN) hardware fragment is constructed, where spike trains with different frequencies are used to evaluate the stability performance of the proposed SNN hardware. Results show that compared to other approaches, the network is stable under different stimuli due to the characteristics of the memristor-based synapse model, and prove that the proposed synapse model is able to mimic biological synaptic behaviour and the problem of synaptic weight infinite modulations is addressed.
Bibliographical noteFunding Information:
This research is supported by the National Natural Science Foundation of China under Grant 61976063 and the funding of Overseas 100 Talents Program of Guangxi Higher Education.
© 2020 Elsevier B.V.
Copyright 2021 Elsevier B.V., All rights reserved.
- BCM theory
- Learning rule
- Spiking neural networks