LP Based Cell Selection with Constraints of Timing, Area, and Power Consumption

Yutaka TAMIYA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E78-A    No.3    pp.331-336
Publication Date: 1995/03/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section of Selected Papers from the 7th Karuizawa Workshop on Circuits and Systems)
Category: VLSI Design Technology and CAD
gate sizing,  timing optimization,  power consumption,  linear programming,  

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This paper presents a new LP based optimal cell selection method. Optimal cell selection is useful tool for final tuning of LSI designs. It replaces drivabilities of cells, adjusting timing, area, and power constraints. Using the latest and earliest arrival times, it can handle cycle time optimization. We also make a useful initial basis, which speeds up a simplex LP solver by 5 times without any relaxations nor approximations. From experimental results, it can speed up a 13k-transistor circuit of a manual chip design by 17% without any increase of area.