An analysis of feedback bridging faults in MOS VLSI

The feedback bridging faults are examined in detail for MOS digital circuits. A necessary condition is obtained which needs to be satisfied for oscillations in the circuit. Expression are given to predict the frequency and amplitude of oscillations. It is shown that when a feedback bridging fault does not cause oscillations, it creates an anomalous output. Such faults may not be detected by logic testing: the authors recommend measurement of power supply current to detect such faults in CMOS circuit.<
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