TIMING ANALYSIS USING FUNCTIONAL RELATIONSHIPS.

Abstract

The usual block-oriented timing analysis for logic circuits does not take into account functional relations between signals. By taking functional relations into consideration, it may be found that a long path is never activated. This observation can be used to calculate improved and more accurate delays. Since it is not practical to consider the complete truth table with all the relationships between signals, the authors use a procedure that checks for nonfunctional paths. The delay calculation then takes into account the discovered nonfunctional paths to determine less pessimistic delays through the logic.