Masaki Hashizume

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—This paper presents a design-for-testability method for detecting delay faults. In order to observe the effect of small delay defects, we present modified boundary scan cells in which a time-to-digital converter (TDC) is embedded. In our boundary scan cells, flip-flops are utilized for both making a scan path and capturing circuit response. The(More)
In this paper, a new test method is proposed for detecting open defects in CMOS ICs. The method is based on supply current of ICs generated by applying time-variable electric field from the outside of the ICs. The feasibility of the test is examined by some experiments. The empirical results promised us that by using the method, open defects in CMOS ICs can(More)
In this paper, a new method for reducing test application time of sequential circuits with scan design is proposed. Scan design is one of most popular design for testability techniques. To reduce scan shifts required to provide the scan pattern, a fully testable scan tree configuration is proposed. The method can configure scan trees before generating test(More)
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(More)