W. Ke, Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
P.R. Menon, Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
Abstract: This paper investigates the relationship between path-delay-fault testability and multiple stuck-at-fault testability in multilevel combinational circuits. It is shown that a complete robust path-delay-fault test set may not detect all multiple stuck-at faults in multilevel circuits. We also show that path-delay-fault testability does not imply multiple stuck-at-fault testability in multilevel circuits, contradicting a recent paper. Certain path delay tests are also shown to be invalidated by the presence of untestable or untested multiple stuck-at faults.
Index Terms:
combinational circuits; logic testing; delays; multivalued logic circuits; delay-testable circuits; multifault testability; path-delay-fault testability; multiple stuck-at-fault testability; multilevel combinational circuits; robust path-delay-fault test set
Citation:
W. Ke, P.R. Menon, "Multifault testability of delay-testable circuits," vts, pp.0400, 13th IEEE VLSI Test Symposium (VTS'95), 1995