Exclusive Test and its Applications to Fault Diagnosis

  • Authors:
  • Vishwani D. Agrawal;Dong Hyun Baik;Yong Chang Kim;Kewal K. Saluja

  • Affiliations:
  • -;-;-;-

  • Venue:
  • VLSID '03 Proceedings of the 16th International Conference on VLSI Design
  • Year:
  • 2003

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Abstract

We introduce a new type of test, called exclusive test,und discuss its application to fault diagnosis in combinational circuits. A test that detects exactly one faultfrom a given pair of faults is called an exclusive test.In general, generation of an exclusive test by a conventional automatic test generator requires a model ofthe circuit with multiple-faults. We describe an ATPGmodel that transforms the exclusive test problem intoa single-fault test generation problem. We present ageneralized diagnostic method and illustrate the use ofexclusive tests in improving the diagnostic resolution ofa test set. Results of diagnosis with exclusive tests forISCAS85 bencmark circuits are included.