Delayed Universal Logic Modules and Sequential Machine Synthesis
Tiu Le Van, N. Van Houtte · IEEE Transactions on Computers · 1975
A universal logic module of n variables (ULM-n) can be considered as a 2n-in-1 multiplexer (inverse binary tree) whose code is determined by the presentation of external variables. This interpretation permits synthesis of sequential machines. Starting from the state transition map, any sequential machine can be realized by delayed ULM's and OR gates. The decomposition concept of Weiner and Hopcroft is generalized to form a uniform synthesis of n-variable sequential machines.