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<p><b>Abstract—</b>Two fast algorithms for static test sequence compaction are proposed for sequential circuits. The algorithms are based on the observation that test sequences traverse through a small set of states and some states are frequently revisited throughout the application of a test set. Subsequences that start and end on the same states may be removed if necessary and if sufficient conditions are met for them. Contrary to the previously proposed methods, where multitudes of fault simulations are required, the techniques described in this paper require only two fault simulation passes and are applied to test sequences generated by various test generators, resulting in significant compactions very quickly for circuits that have many revisited states.</p>
Static test set compaction, test generation, recurrence subsequence, fault simulation.

J. H. Patel, M. S. Hsiao and E. M. Rudnick, "Fast Static Compaction Algorithms for Sequential Circuit Test Vectors," in IEEE Transactions on Computers, vol. 48, no. , pp. 311-322, 1999.
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