Rescuing memristor-based neuromorphic design with high defects

Memristor-based synaptic network has been widely investigated and applied to neuromorphic computing systems for the fast computation and low design cost. As memristors continue to mature and achieve higher density, bit failures within crossbar arrays can become a critical issue. These can degrade th...

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Bibliographic Details
Published in:	2017 54th ACM/EDAC/IEEE Design Automation Conference (DAC) pp. 1 - 6
Main Authors:	Chenchen Liu, Miao Hu, Strachan, John Paul, Hai Li
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01.06.2017
Subjects:	Degradation Hardware Memristors Neural networks Neuromorphics Redundancy Training
Online Access:	Get full text
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Summary:	Memristor-based synaptic network has been widely investigated and applied to neuromorphic computing systems for the fast computation and low design cost. As memristors continue to mature and achieve higher density, bit failures within crossbar arrays can become a critical issue. These can degrade the computation accuracy significantly. In this work, we propose a defect rescuing design to restore the computation accuracy. In our proposed design, significant weights in a specified network are first identified and retraining and remapping algorithms are described. For a two layer neural network with 92.64% classification accuracy on MNIST digit recognition, our evaluation based on real device testing shows that our design can recover almost its full performance when 20% random defects are present.
DOI:	10.1145/3061639.3062310