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This paper deals with hazards on outputs of combinational circuits without feedback for multiple input changes. A procedure is given to decompose a Boolean function into a feedback free circuit. The procedure either gives a logic hazard-free circuit or shows that the Boolean function cannot be broken down into a feedback free circuit which is free of logic hazards for multiple input changes.
It can he easily shown that any combinational circuit with only uncomplemented inputs can be realized using three stages of NOR logic. However, if such a circuit is designed by a direct extension of the theory of two-stage circuits using AND Gates and OR Gates. the result- will not be an efficient circuit. In order to design such NOR gate circuits efficiently it is necessary to modify the design techniques...
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