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Published on: May 13, 2020
Lognormal switching times for titanium dioxide bipolar memristors: origin and resolution
Gilberto Medeiros-Ribeiro1, Frederick Perner, Richard Carter
1Hewlett-Packard Laboratories, Palo Alto, CA 94304, USA.
Abstract:
We measured the switching time statistics for a TiO(2) memristor and found that they followed a lognormal distribution, which is a potentially serious problem for computer memory and data storage applications. We examined the underlying physical phenomena that determine the switching statistics and proposed a simple analytical model for the distribution based on the drift/diffusion equation and previously measured nonlinear drift behavior. We designed a closed-loop switching protocol that dramatically narrows the time distribution, which can significantly improve memory circuit performance and reliability.
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