A Method for the Realization of Fail-Safe Asynchronous Sequential Circuits

The problem of the realization of fail-safe asynchronous sequential circuits was recently studied by Patterson and Sawin. This correspondence presents a different approach to the same subject which, in some cases, yield us simpler realization than those by the methods ever proposed, combining the notion of the ordered partition with Tracey's method for the state assignment of asynchronous sequential circuit.