Abstract
Worst-case analysis is one of the most often used techniques for verifying that the sensitivity of integrated circuit (IC) performances to changes in manufacturing conditions is minimized. However, worst-case analysis is often carried out in terms of a correlated set of parameters, which results in a design that is unnecessarily pessimistic. This paper presents a new approach to the worst-case analysis of integrated circuits that results in more realistic estimates of variations in device and circuit performances. In particular, worst-case analysis is performed in terms of a set of statistically independent process disturbances. A software package for worst-case analysis is described and illustrated by a number of examples. The results of the proposed worst-case analysis method are compared to Monte Carlo simulations.
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