Spike-Timing Dependent Plasticity in Unipolar Silicon Oxide RRAM Devices

Frontiers in Neuroscience
Konstantin ZarudnyiAnthony J Kenyon

Abstract

Resistance switching, or Resistive RAM (RRAM) devices show considerable potential for application in hardware spiking neural networks (neuro-inspired computing) by mimicking some of the behavior of biological synapses, and hence enabling non-von Neumann computer architectures. Spike-timing dependent plasticity (STDP) is one such behavior, and one example of several classes of plasticity that are being examined with the aim of finding suitable algorithms for application in many computing tasks such as coincidence detection, classification and image recognition. In previous work we have demonstrated that the neuromorphic capabilities of silicon-rich silicon oxide (SiOx) resistance switching devices extend beyond plasticity to include thresholding, spiking, and integration. We previously demonstrated such behaviors in devices operated in the unipolar mode, opening up the question of whether we could add plasticity to the list of features exhibited by our devices. Here we demonstrate clear STDP in unipolar devices. Significantly, we show that the response of our devices is broadly similar to that of biological synapses. This work further reinforces the potential of simple two-terminal RRAM devices to mimic neuronal functionality in...Continue Reading

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Citations

Jun 30, 2018·Advanced Materials·Adnan MehonicAnthony J Kenyon
Feb 6, 2020·Frontiers in Neuroscience·Daniel J MannionAnthony J Kenyon
Oct 21, 2021·Nanotechnology·S TappertzhofenR Waser

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