Patent ID: 7546227

Claim:
A method for generating conformally mapped model output data points for a driver cell, the method comprising: on a computer, specifying model indexing parameter values for input slew and output capacitance; selecting an upper precharacterization data set and a lower precharacterization data set from a cell library, wherein the upper precharacterization data set is greater than a first model indexing parameter value, and wherein the lower precharacterization data set is less than the first model indexing parameter value; determining maximum values for the upper precharacterization data set and the lower precharacterization data set; generating a scale factor based on the model indexing parameter values and indexing parameter values of the upper precharacterization data set and the lower precharacterization data set; generating a set of time and current factors for the upper precharacterization data set and the lower precharacterization data set using the scale factor and the maximum values; scaling the upper precharacterization data set and the lower precharacterization data set using the set of time and current factors to generate an upper output data set and a lower output data set; merging the upper and lower output data sets to generate a model output current value at each adjusted time value; generating a piecewise linear model for the input slew and output capacitance using the model output current values at the adjusted time values; and outputting the piecewise linear model for the driver cell.