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Decompressor/PRPG for applying pseudo-random and deterministic test patterns

  • US 7,865,794 B2
  • Filed: 03/12/2009
  • Issued: 01/04/2011
  • Est. Priority Date: 11/23/1999
  • Status: Expired due to Fees
First Claim
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1. A method for operating a decompressor/PRPG comprising:

  • in a pseudo-random phase of operation;

    inputting an initial value;

    generating from the initial value a set of pseudo-random test patterns; and

    outputting the pseudo-random test patterns;

    in a deterministic phase of operation;

    inputting a compressed deterministic test pattern;

    decompressing the compressed deterministic test pattern into a decompressed deterministic test pattern as the compressed deterministic test pattern is being input, the decompressing including logically combining one or more bits of the compressed deterministic test pattern with bits stored within the decompressor/PRPG; and

    outputting the decompressed deterministic test pattern.

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