Residue arithmetic for variation-tolerant design of multiply-add units

  • Authors:
  • Ioannis Kouretas;Vassilis Paliouras

  • Affiliations:
  • Electrical and Computer Engineering Dept., University of Patras, Greece;Electrical and Computer Engineering Dept., University of Patras, Greece

  • Venue:
  • PATMOS'09 Proceedings of the 19th international conference on Integrated Circuit and System Design: power and Timing Modeling, Optimization and Simulation
  • Year:
  • 2009

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Abstract

This paper investigates the residue arithmetic as a solution for the design of variation-tolerant circuits. Motivated by the modular organization of residue processors, we comparatively study the sensitivity of residue arithmetic-based and binary processors to delay variations, and in particular the impact of delay variations onto the maximum critical path. Experiments are performed on two multiply-add (MAC) circuits based on residue and binary arithmetic. Results reveal that residue arithmetic-based circuits are up to 94% less sensitive to delay variation than binary circuits, thus leading to increased timing yield.