Delay-Fault Diagnosis by Critical-Path Tracing

  • Authors:
  • Patrick Girard;Christian Landrault;Serge Pravossoudovitch

  • Affiliations:
  • -;-;-

  • Venue:
  • IEEE Design & Test
  • Year:
  • 1992

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Abstract

A delay fault diagnosis process consisting of simulation of the fault-free circuit with a four-valued logic algebra and critical-path tracing from primary outputs to primary inputs is presented. An alternative to fault simulation, the method requires no delay-size-based fault models and considers only the fault-free circuit. A sensitivity analysis process for improving diagnosis accuracy is also presented.