The comparative study of two analytical methods for detection and elimination of the static hazard in Combinational Logic Circuits

In this paper, the authors do a comparative study of two methods to eliminate the static hazards from logical functions. The first method consists in determining the coupled terms and getting the term that masks the static hazards, and the second method consists in determining the masking additional term by solving a system of Boolean equations. From the presented examples, the authors deduced that the 2^nd method (solving a Boolean equations system) is more advantageous because it eliminates the heuristic nature of the first method (the determination of coupled terms) and, by solving the equations system it determines all prime implicants that needs to be added to the function´s expression.