Optimal Robust Compression of Test Responses

  • Authors:
  • M. G. Karpovsky;P. Nagvajara

  • Affiliations:
  • -;-

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1990

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Abstract

A compression of test responses technique for a built-in self-test (BIST) VLSI design is presented. The authors introduce the notion of a robust compression technique which incorporates prior knowledge of the statistics of fault-free responses under pseudorandom testing to achieve a guaranteed error detectability independent of a distribution of errors. The presented robust quadratic compressor requires two r-bit registers (r-bit signature) more than a multiple-input linear feedback shift register; however, it provides for equal protection against all error patterns. Therefore, quadratic compressors are optimal and robust with respect to a statistics of errors in a device under test.