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Polylinear Sequential Circuit Realizations of Finite Automata

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Abstract—This paper considers the problem of obtaining realizations of synchronous finite automata from their regular expression specifications. A polylinear sequential circuit realization is defined, and it is proven that every synchronous finite automaton has such a realization. A method is developed for the derivation of a polylinear sequential circuit realization of any automaton specified by a regular expression. The method uses a derivative approach and is applied to the reverse of the given regular expression. As a by-product of developing the method, a connection between the state assigmnent problem and regular expressions is established. Another by-product is a simple method for obtaining polylinear sequential circuit realizations of automata specified by flow tables instead of regular expressions.

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Computers, IEEE Transactions on  (Volume:C-17 ,  Issue: 3 )