Tri-state gates in logical networks

Several methods were presented to facilitate the use of tri-state gates in the design of logic networks. Special considerations for the use of tri-state gates are discussed in order that the reader might get a feel for the capability of tri-state logic and so that he will be aware of problems which may appear in the course of the design and development of a tri-state logic network. Several problems are worked, both combinational and sequential examples, and the advantages of tri-state over classical logic are discussed. Two additional examples, one of an iterative network and one of a multi-functional cell illustrate the applicability of tri-state gates to many digital designs.