alexa Two Pattern Test Cubes for Transition Path Delay Faults Test for ISCAS-85 C432
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
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Research Article

Two Pattern Test Cubes for Transition Path Delay Faults Test for ISCAS-85 C432

T.Vishnu Murty1, G.Seetha Mahalakshmi2
  1. M.Tech, Asst. Professor, Dept of Electronics & Communication Engineering, Pragati Engineering College, Surampalem, AP, India
  2. M.Tech Student, Dept of Electronics & Communication Engineering, Pragati Engineering College, Surampalem, AP, India
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Abstract

Considering full-scan circuits, incompletely-specified tests, or test cubes, are used for test data compression. When considering path delay faults, certain specified input values in a test cube are needed only for determining the lengths of the paths associated with detected faults. Path delay faults, and therefore, small delay defects, would still be detected if such values are unspecified. The goal of this paper is to explore the possibility of increasing the number of unspecified input values in a test set for path delay faults by un specifying such values in order to make the test set more amenable to test data compression. Experimental results indicate that significant numbers of such values exist. The proposed procedure unspecified them gradually to obtain a series of test sets with increasing numbers of unspecified values and decreasing path lengths. Experimental results also indicate that filling the unspecified values randomly (as with some test data compression methods) recovers some or all of the path lengths associated with detected path delay faults. The procedure uses a matching of the sets of detected faults for the comparison of path lengths.

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