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It is very difficult, if not impossible, to design hazard free circuits in view of substantial delay uncertainties of gates and interconnects implemented in sub micron technologies. In this paper, we propose diagnosis methods for gate delay faults for such circuits. The fault simulation method employed by us uses eight values and calculates logic values as well as earliest transition times and latest...
This paper presents a diagnosis method for gate delay faults in the presence of clock delay faults. The method deduces candidate faults using a single gate delay fault dictionary and a single clock delay fault dictionary, which contain the information of latest transition time of signals as well as output logic values. To reduce the diagnostic ambiguity we remove those faults from the candidate fault...
Shrinking timing margins for modern high speed digital circuits require a careful reconsideration of faults and fault models. In this paper, we discuss detection of transition faults in the presence of small clock delay faults. We first show that in the presence of a delay fault on a clock line some transition faults may fail to be detected. We propose a test generation method for detecting such faults...
It is believed that resistive open faults can cause small delay defects at wires, contacts, and/or vias of a circuit. However, it remains to be elucidated whether any methods could diagnose resistive open faults. We propose a method for diagnosing resistive open faults by using a diagnostic delay fault simulation with the minimum detectable delay fault size. We also introduce a fault excitation function...
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