An algorithm for power estimation in switched-capacitor circuits

Authors:
Chad Young;Giorgio Casinovi;Jonathan Fowler;Paul Kerstetter
Affiliations:
School of Electrical & Computer Engineering, Georgia Institute of Technology, Atlanta, GA;Info Tech & Telecommunications Lab, Georgia Tech Research Institute, Atlanta, GA;School of Electrical & Computer Engineering, Georgia Institute of Technology, Atlanta, GA;School of Electrical & Computer Engineering, Georgia Institute of Technology, Atlanta, GA
Venue:
Proceedings of the 1996 IEEE/ACM international conference on Computer-aided design
Year:
1997

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Abstract

A number of low-power designs, such as those for mobile communication equipment, contain switched-capacitor circuits. In such designs it is important to be able to estimate the power dissipated by the switched-capacitor portion of the circuit. This paper describes an algorithm for the computation of statistical information about the power dissipated in a switched-capacitor circuit when corresponding statistical information about the inputs to the circuit is known. Ordinary circuit simulators are not suited for this task, because they can only compute the power dissipated by the circuit for one specific set of input signals. The algorithm does not require Monte-Carlo analyses, and it accounts for correlation among the inputs. To demonstrate the algorithm's performance, numerical results obtained on a number of sample switched-capacitor circuits are reported.