Novel designs of spiking neuron circuit and STDP learning circuit based on memristor

The pure circuit implementation of STDP is a worthwhile work. In this study, a novel spiking neuron circuit and STDP learning circuit based on memristors are designed. The proposed spiking neuron circuit, which is based on conventional leaky integrate-and-fire neuron and utilizes the nonlinear variation of memristance, is served to generate spikes. Different release thresholds and amplitudes of the spikes can be obtained through tuning circuit parameters. Extending on the spiking neuron circuit, a STDP learning circuit is built to perform unsupervised learning behaviors. Furthermore, a crossbar array architecture is finally considered to fabricate multi-input multi-output spiking neural network which also perform STDP learning effectively. Circuit simulation results in PSPICE prove the availability of the two proposed circuits.