VLSI INTERCONNECT DESIGN AUTOMATION USING QUANTITATIVE AND SYMBOLIC TECHNIQUES

This paper presents a framework for design automation of VLSI intercon nect geometries, Crosstalk, overshoot, undershoot, signal delay, and l ine impedance are design performance parameters under consideration, S ince the dependence of electrical performance parameters on geometry i s not easily defined, both qualitative and quantitative techniques are used, Two knowledge bases are introduced-a model and simulation base, The model base contains models used for terminations, transmission li ne parameter extractors, and transmission lines, The simulation knowle dge base contains a set of approximations and routines for the exact e valuation of electrical performance parameters. Procedures are introdu ced for the automatic extraction of applicable models and simulation t echniques in the design process. An unconstrained optimization routine is used as a design search technique, The approach presented here giv es faster results than approaches shown in literature, with little sac rifice of accuracy.