Analytical input mapping for modelling energy dissipation of complex CMOS gates

Input mapping is an important step used in the equivalent inverter modelling technique to estimate energy dissipation in CMOS gates. The purpose of the input mapping is to map multiple inputs of a gate into one equivalent input to simplify the analysis process. An analytical input mapping method for all possible inputs of parallel circuit structures is presented. An application of the equivalent inverter modelling technique using this algorithm on complex CMOS gates containing feedback structures is also included. The model is verified by Cadence SPICE simulation. Very good agreement between the model predictions and simulation results is obtained.