DocumentCode :
299160
Title :
Layout optimization using arbitrarily high degree posynomial models
Author :
Sancheti, Piyush K. ; Sapatnekar, Sachin S.
Author_Institution :
Cadence Design Syst. Inc., Chelmsford, MA, USA
Volume :
1
fYear :
1995
fDate :
30 Apr-3 May 1995
Firstpage :
53
Abstract :
The problem of designing individual macrocells for a library with power and speed considerations is addressed here. 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
Keywords :
CMOS digital integrated circuits; cellular arrays; circuit analysis computing; circuit layout CAD; circuit optimisation; convex programming; delays; integrated circuit layout; integrated circuit modelling; logic CAD; nonlinear programming; CMOS IC; IC layout; cell delay; cell power dissipation; circuit-level simulation; convex programming problem; high degree posynomial models; layout optimization; macrocell design; modeling; optimal macrocell; posynomial approximating functions; CMOS digital integrated circuits; Circuit simulation; Delay estimation; Design optimization; Digital circuits; Libraries; Macrocell networks; Power dissipation; Power system modeling; Semiconductor device modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
Type :
conf
DOI :
10.1109/ISCAS.1995.521449
Filename :
521449
Link To Document :
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