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Calculation of AC Power in CMOS Circuits Using Simulation Data

IP.com Disclosure Number: IPCOM000062476D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Kahle, JA Masleid, RP Torres, A [+details]

Abstract

A method is described for exactly computing AC power dissipation in CMOS very large-scale integration (VLSI) as a function of circuit activity. In a CMOS VLSI design power dissipation by net basis is computed as: (Image Omitted) The standard method for computing power dissipation had been by estimating N.S. based on experimentation and not explicitly computed as a function of circuit activity. This is a significant flaw since circuit activity is often a function of the software programs being executed. The method of power calculation, described here, eliminates this problem by automatically using circuit simulation data and net capacitance to compute the actual power used in running a particular piece of software code.