Time/logic variables used for digital hazard search

The present work considers the problem of hazard in combinatorial logic structures. The start point is the classic time constants method. In order to improve it we shall consider the different transition times that characterize the ldquo0rdquouarrldquo1rdquo and ldquo1rdquodarrldquo0rdquo transitions for a logic gate. That will refine the methodpsilas precision. Furthermore in order to reduce the amount of calculus requested we shall define and use two time dependent logic variables (TDLV). The simplicity and precision of the improved method will be presented by aid of a real life example.