Zero-aliasing space compaction of test responses using multipleparity signatures

摘要

We present a parity-based space compaction technique thatneliminates aliasing for any given fault model. The test responses from ancircuit under test with a large number of primary outputs are mergedninto a narrow signature stream using a multiple-output parity tree. Thenfunctions realized by the different outputs of the compactor arendetermined by a procedure that targets the desired fault model.nExperimental results for the ISCAS-85 benchmarks show that zero aliasingnof single stuck-line faults can be achieved with a two output parityntree compactor. Our findings corroborate recent results on thenfundamental limits of space compaction