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Fault-tolerant multi-level logic decoder for nanoscale crossbar memory arrays

Published: 05 November 2007 Publication History

Abstract

Several technologies with sub-lithographic features are targeting the fabrication of crossbar memories in which the nanowire decoder is playing a major role. In this paper, we suggest a way to reduce the decoder size and keep it defect tolerant by using multiple threshold voltages (VT), which is enabled by our underlying technology. We define two types of multi-valued decoders and model the defects they undergo due to the VT variation. Multi-valued hot decoders yield better area saving than n-ary reflexive codes (NRC), and under severe conditions, NRC enables a non-vanishing part of the code space to recover. There are many combinations of decoder type and number of VT's yielding equal effective memory capacities. The optimal choice saves area up to 24%. We also show that the precision of the addressing voltages for decoders with unreliable VT's is a crucial parameter for the decoder design and permits large savings in memory area.

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Cited By

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  • (2009)A stochastic perturbative approach to design a defect-aware thresholder in the sense amplifier of crossbar memoriesProceedings of the 2009 Asia and South Pacific Design Automation Conference10.5555/1509633.1509819(835-840)Online publication date: 19-Jan-2009
  • (2008)Prospects for logic-on-a-wireMicroelectronic Engineering10.1016/j.mee.2008.01.02285:5(1406-1409)Online publication date: 1-May-2008
  1. Fault-tolerant multi-level logic decoder for nanoscale crossbar memory arrays

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    cover image ACM Conferences
    ICCAD '07: Proceedings of the 2007 IEEE/ACM international conference on Computer-aided design
    November 2007
    933 pages
    ISBN:1424413826
    • General Chair:
    • Georges Gielen

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    IEEE Press

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    Published: 05 November 2007

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    ICCAD '07 Paper Acceptance Rate 139 of 510 submissions, 27%;
    Overall Acceptance Rate 457 of 1,762 submissions, 26%

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    • (2009)A stochastic perturbative approach to design a defect-aware thresholder in the sense amplifier of crossbar memoriesProceedings of the 2009 Asia and South Pacific Design Automation Conference10.5555/1509633.1509819(835-840)Online publication date: 19-Jan-2009
    • (2008)Prospects for logic-on-a-wireMicroelectronic Engineering10.1016/j.mee.2008.01.02285:5(1406-1409)Online publication date: 1-May-2008

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