Self-Checking Design in Eastern Europe

LEADING VLSl CHIP and digital system manufacturers report an increasing number of undetected temporary faults that cause permanent damage in general-purpose microprocessor-based systems.’ Clearly, modern VLSI circuits require higher reliability as traditional means of protection against temporaiy faults become insufficient. This need renewed interest in self-checking circuits for on-line error detection in commercial computers.’ A self-checking circuit is a digital circuit that detects its internal faults simultaneously with normal functioning, for example, by encoding input, internal, andfor output states using error-detecting STANISLAW J. PIESTRAK