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Oscillatory Neural Networks Using VO2 Based Phase Encoded Logic

Abstract : Nano-oscillators based on phase-transition materials are being explored for the implementation of different non-conventional computing paradigms. In particular, vanadium dioxide (VO 2 ) devices are used to design autonomous non-linear oscillators from which oscillatory neural networks (ONNs) can be developed. In this work, we propose a new architecture for ONNs in which sub-harmonic injection locking (SHIL) is exploited to ensure that the phase information encoded in each neuron can only take two values. In this sense, the implementation of ONNs from neurons that inherently encode information with two-phase values has advantages in terms of robustness and tolerance to variability present in VO 2 devices. Unlike conventional interconnection schemes, in which the sign of the weights is coded in the value of the resistances, in our proposal the negative (positive) weights are coded using static inverting (non-inverting) logic at the output of the oscillator. The operation of the proposed architecture is shown for pattern recognition applications.
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Contributor : Eirini Karachristou Connect in order to contact the contributor
Submitted on : Wednesday, November 17, 2021 - 10:58:32 AM
Last modification on : Thursday, November 18, 2021 - 3:56:36 AM


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Juan Núñez, María José Avedillo de Juan, Manuel Jiménez Través, José Quintana, Aida Todri-Sanial, et al.. Oscillatory Neural Networks Using VO2 Based Phase Encoded Logic. Frontiers in Neuroscience, Frontiers, 2021, 15, pp.#655823. ⟨10.3389/fnins.2021.655823⟩. ⟨lirmm-03432290⟩



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