10/01/1993 09:00 AM
Computer Engineering
This paper presents a new technique that can efficiently and accurately evaluate the timing response of high speed interconnects, of which transient analysis becomes ever more important with the higher circuit speeds and finer feature sizes. This method is based on the scattering parameter macromodel, whose transfer function will be approximated by a new approximation function called Mixed Exponential Function (MEF). By taking advantage of the best properties of Pade approximation and Exponentially Decayed Polynomial function, this method efficiently achieves high accuracy afforded by the former, and high stability by the latter. A driver model suitable for sub-micron CMOS design is also presented to incorporate the nonlinearity of the circuit elements. The interconnect macro model and the nonlinear driver model combined with the Mixed Exponential Function approximation provide accuracy comparable to that of SPICE at a speed one to two orders of magnitude faster.
