Physical defects cause behaviors unmodeled by e v en the best fault simulators, which complicates predic-tive diagnosis. This paper reports on a diagnosis procedure that uses modiied composite signatures constructed from single stuck-at information combined with a lexicographic matching and ranking algorithm. The diagnosis procedure is used to perform… (More)
abstract Two approaches have been used to balance the cost of generating eeective tests for ICs and the need to increase the ICs' quality level. The rst approach favors using high-level fault models to reduce test generation costs at the expense of test quality, and the second approach favors the use of low-level, technology-speciic fault models to increase… (More)
The advantage to " one test at a time " fault diagnosis is its ability to implicate the components of complicated defect behaviors. The disadvantage is the large size and opacity of the diagnostic answer. In this paper, we address the problems of pertest fault diagnosis by improving the candidate matching, introducing scoring and ranking techniques, and by… (More)
This paper presents a sequential test generation method based on Boolean satissability. The method produces near-minimal test sizes. We discuss the ex-ibility provided by Boolean satissability to extend the fault model to realistic faults. Experimental results using ISCAS-89 benchmark circuits and comparisons with previously published results are presented.
Robust path-delay test generator for standard scan designs. A new approach to derive robust tests for stuck-open faults in CMOS combinational logic circuits. We presented a new fault simulation algorithm for realistic CMOS network breaks. We showed that Miller feedback and feedthrough eeects can invalidate a test for a network break just as charge sharing… (More)
Afier introducing the Primitive Bridge Function, a characteristic function describing the behavior of bridged components , we present a theorem for detecting feedback bridge faults. We discuss two diflerent methods of bridge fault simulation , one of which is new, and present experimental results relating the relative eficiency of the two njethods. We… (More)