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Computing the entire active area/power consumption versus delay tradeoff curve for gate sizing with a piecewise linear simulator

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3 Author(s)
M. R. C. M. Berkelaar ; Eindhoven Univ. of Technol., Netherlands ; P. H. W. Buurman ; J. A. G. Jess

The gate sizing problem is the problem of finding load drive capabilities for all gates in a given Boolean network such, that a given delay limit is kept, and the necessary cost in terms of active area usage and/or power consumption is minimal. This paper describes a way to obtain the entire cost versus delay tradeoff curve of a combinational logic circuit in an efficient way. Every point on the resulting curve is the global optimum of the corresponding gate sizing problem. The problem is solved by mapping it onto piecewise linear models in such a way, that a piecewise linear (circuit) simulator can do the job. It is shown that this setup is very efficient, and can produce tradeoff curves for large circuits (thousands of gates) in a few minutes. Benchmark results for the entire set of MCNC '91 two-level examples are given

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:15 ,  Issue: 11 )