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Optimal design of macrocells for low power and high speed

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2 Author(s)
Sancheti, P.K. ; Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA ; Sapatnekar, S.S.

The problem of designing individual macrocells for a library for low power and high speed is addressed here, and a new technique for optimization using posynomial approximating functions is devised. In the design of each macrocell, optimality in design is critical and highly accurate techniques for measuring the performance are required during optimization. This paper presents methods for accurately estimating the worst-case contribution of the power and delay of a cell to a circuit. The program uses circuit-level simulation to calculate the power dissipation and delay of the cell with the highest accuracy. A rationale for using arbitrary degree posynomial modeling functions for area, delay, and power modeling is presented. The problem is then formulated as a convex programming problem, and a rigorous optimization technique is used to arrive at the optimal macrocell

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:15 ,  Issue: 9 )