ZERO-ALIASING SPACE COMPACTION OF TEST RESPONSES USING MULTIPLE PARITY SIGNATURES

We present a parity-based space compaction technique that eliminates a liasing for any given fault model. The test responses from a circuit u nder test with a large number of primary outputs are merged into a nar row signature stream using a multiple-output parity tree. The function s realized by the different outputs of the compactor are determined by a procedure that targets the desired fault model, Experimental result s for the ISCAS-85 benchmarks show that zero aliasing of single stuck- line faults can be achieved with a two-output parity tree compactor. O ur findings corroborate recent results on the fundamental limits of sp ace compaction.