Design of static CMOS self-checking circuits using built-in current sensing

Abstract
ISBN: 0818628707The authors present a novel scheme to implement self-checking circuits in static CMOS. A strongly code disjoint (SCD) built-in current sensor (BICS) is presented and is used to cover faults whose detection cannot be guaranteed by logic monitoring. A previously fabricated and tested high-speed BICS is examined in this paper for its behavior in the presence of faults. Then, a self-exercising mechanism is designed to obtain the SCD property. The integration of this SCD BICS with self-checking circuit achieves the well-known totally self-checking (TSC) goal. The low-cost and high fault coverage are attractive for many high reliability and critical applications

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