Estimation of power dissipation in switched-capacitor circuits

This paper presents an algorithm for probabilistic analysis of the power dissipation in switched-capacitor circuits, which are frequently found in a number of low-power designs, such as those for mobile communications equipment. The inputs to the circuit are modeled as a stationary Markov process of order zero or one. The expected power dissipation is obtained from first- and second-order moments of (he probability distributions of voltages and charges in the circuit. The algorithm does not require Monte Carlo analysis; instead, (he moments of the probability distributions are computed from the solutions of systems of linear algebraic equations, taking into account any correlation among the inputs. To demonstrate the algorithm´s performance, numerical results obtained on a number of sample switched-capacitor circuits are reported.