Arbitrary Spike Time Dependent Plasticity (STDP) in memristor by analog waveform engineering

Document Type

Article

Publication Date

6-1-2017

Abstract

In the literature, various pulse-based programming schemes have been used to mimic typical spike time-dependent plasticity (STDP)-based learning rule observed in biological synapses. In this letter, we demonstrate the capability to generated arbitrary STDP behaviors by using analog programming waveforms inspired by neuronal action potential. First, we propose a simple algorithm to generate any arbitrary form of STDP. Second, we show the feasibility of a range of spike correlation time scales for STDP, e.g., biological ( ∼100 ms) to accelerated (∼20μs), based on W/ r0.7Ca0.3MnO3/Pt based memristor. Third, we experimentally demonstrate several forms of STDP behaviors, where the pre- and post-neuronal waveforms are randomly spaced in time, akin to operational conditions. STDP shape corresponds well to waveforms. Thus, we show that artificial synapses can achieve the richness observed in biology as well as a range of STDP timescales for biologically compatible to accelerated neural network applications.

Identifier

85021770026 (Scopus)

Publication Title

IEEE Electron Device Letters

External Full Text Location

https://doi.org/10.1109/LED.2017.2696023

ISSN

07413106

First Page

740

Last Page

743

Issue

6

Volume

38

Fund Ref

Department of Science and Technology, Ministry of Science and Technology, India

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