A new MOS circuit primitive for fast timing simulations

A new MOS circuit primitive, of which an inverter is a special case, is presented. The proposed MOS circuit primitive is shown to be more suitable for switch level and fast timing simulations than the commonly used inverter. The approach for obtaining the exact analytic transient solution of this general MOS primitive for piecewise-linear inputs is also presented. For circuit simulation of medium-size digital circuits containing a few hundred transistors, the application of this primitive along with its analytic solution has resulted in two to three orders of speed improvement over the conventional circuit simulator