Abstract
In this paper we consider minimum feedback loop realizations of synchronous sequential switching circuits. It is shown that any finite state sequential function can be realized as a synchronous sequential circuit with a single feedback loop, or equivalently, as a one-dimensional iterative circuit with one amplifier between stages. Techniques are described which enable us to find such a realization for a given flow table. A simple test procedure is described to determine if a sequential function can be realized as a sequential circuit using its output function as feedback, whether the output is completely or incompletely specified.

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