Fault Detection and Isolation Techniques for Quasi Delay-Insensitive Circuits

  • Authors:
  • Christopher LaFrieda;Rajit Manohar

  • Affiliations:
  • Cornell University, Ithaca, NY;Cornell University, Ithaca, NY

  • Venue:
  • DSN '04 Proceedings of the 2004 International Conference on Dependable Systems and Networks
  • Year:
  • 2004

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Abstract

This paper presents a novel circuit fault detectionand isolation technique for quasi delay-insensitive asynchronouscircuits. We achieve fault isolation by a combinationof physical layout and circuit techniques. Theasynchronous nature of quasi delay-insensitive circuitscombined with layout techniques makes the design tolerantto delay faults. Circuit techniques are used to makesections of the design robust to non-delay faults. The combinationof these is an asynchronous defect-tolerant circuitwhere a large class of faults are tolerated, and the remainingfaults can be both detected easily and isolated to asmall region of the design.