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Direct logic diagnostics with signature-based fault dictionaries

  • US 7,509,551 B2
  • Filed: 08/01/2006
  • Issued: 03/24/2009
  • Est. Priority Date: 08/01/2005
  • Status: Active Grant
First Claim
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1. A method of diagnosing faults in a circuit, comprising:

  • receiving a signature produced by a signature generator, the signature corresponding to the circuit'"'"'s response to no more than one test pattern;

    comparing the signature to entries of a fault dictionary;

    matching an entry of the fault dictionary to the signature if the entry identifies a fault that explains the signature; and

    storing the fault in a list of fault candidates.

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