Estimation of inertial-delay dependent switching activities by using time-stamped transition density

We propose a new method to improve the accuracy of the transition density for the estimation of inertial-delay dependent switching activities in combinational circuits. The previous methods have used the same technique that is commonly used in logic simulators to filter out unacceptably short logic pulses. However, they underestimated the difference between probabilistic property of the transition density and the deterministic property of signals in logic simulations. We, for the first time in our knowledge, describe the problems of the previous methods and propose a new method to overcome them. It is based on the time-stamped transition density and a new formula considering inertial-delay effect in the probabilistic domain. The experimental results demonstrate the validity of our proposed method