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Noisy In-Memory Recursive Computation with Memristor Crossbars

Elsa Dupraz 1, 2 Lav Varshney 3 
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : This paper considers iterative dot-product computation implemented on in-memory memristor crossbar substrates. To address the case where true memristor conductance values may differ from their target values, it introduces a theoretical framework that characterizes the effect of conductance value variations on the final computation. For simple dot-products, the final computation error can be approximated by a Gaussian distribution; the mean and variance values of the corresponding Gaussian distribution are provided. For iterative dot-product computation, recursive expressions are derived for the means and variances of the successive computation outputs. Experiments verify the accuracy of the proposed analysis on both synthetic data and on images processed with memristor-based principal component analysis.
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Submitted on : Friday, August 28, 2020 - 4:31:25 PM
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Elsa Dupraz, Lav Varshney. Noisy In-Memory Recursive Computation with Memristor Crossbars. ISIT 2020 : International Symposium on Information Theory, Jun 2020, Los Angeles, United States. ⟨10.1109/ISIT44484.2020.9174364⟩. ⟨hal-02925048⟩



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