Abstract
Binary logic (i.e., Boolean algebra) is usually employed to analyze and design binary switching circuits. The circuits designed by binary logic behave in an expected manner in steady states but do occasionally show unexpected behaviors in transient states. This is because, although binary logic can describe all steady state behaviors, it cannot adequately describe transient behaviors changing from 0 to 1 or conversely from 1 to 0. Hazards are one example of such unexpected behaviors occurring in combinational circuits in a transient state. D. A. Huffmanl and E. J. McClusky2, firstly, pointed out hazards contained in switching circuits and discussed procedures for detecting and removing hazards. M. Yoeli3 showed that the B-ternary logic could be utilized to detect static hazards in combinational switching circuits. Furthermore, the method was extended by E. B. Eichelberger4 for application to hazards with multiple-input changes and hazards in sequential circuits. Recently, these results have been improved by M. Mukaidono5.
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