Sensitivity-driven placement of analog modules

This paper describes a new algorithm for the placement of analog modules. The algorithm is a hybrid of greedy partitioning and mean field annealing techniques. The sensitivities of performance functions are used to compute the changes in the functions during the placement process. The objective function is designed to incorporate the effect of the performance functions in terms of their slacks beyond the design constraints along with other requirements such as area and aspect ratio. The algorithm has been implemented and results are tested for seven commercial bipolar circuits.<<ETX>>

[1]  R.S. Gyurcsik,et al.  Use of performance sensitivities in analog cell layout , 1991, 1991., IEEE International Sympoisum on Circuits and Systems.

[2]  J. Litsios,et al.  ILAC: an automated layout tool for analog CMOS circuits , 1989 .

[3]  Rob A. Rutenbar,et al.  KOAN/ANAGRAM II: new tools for device-level analog placement and routing , 1991 .

[4]  J. Litsios,et al.  ILAC: an automated layout tool for analog CMOS circuits , 1988, Proceedings of the IEEE 1988 Custom Integrated Circuits Conference.

[5]  Yoichi Shiraishi,et al.  A high-packing density module generator for bipolar analog LSIs , 1990, 1990 IEEE International Conference on Computer-Aided Design. Digest of Technical Papers.

[6]  E. Charbon,et al.  A Constraint-driven Placement Methodology For Analog Integrated Circuits , 1992, 1992 Proceedings of the IEEE Custom Integrated Circuits Conference.

[7]  Alberto Sangiovanni-Vincentelli,et al.  TimberWolf3.2: A New Standard Cell Placement and Global Routing Package , 1986, DAC 1986.

[8]  P.R. Gray,et al.  OPASYN: a compiler for CMOS operational amplifiers , 1990, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..

[9]  Alberto L. Sangiovanni-Vincentelli,et al.  Constraint generation for routing analog circuits , 1991, DAC '90.

[10]  Yasuhiro Kobayashi,et al.  LADIES: an automatic layout system for analog LSI's , 1989, 1989 IEEE International Conference on Computer-Aided Design. Digest of Technical Papers.

[11]  P. E. Allen,et al.  Performance driven analog layout compiler , 1990, IEEE International Symposium on Circuits and Systems.

[12]  Ronald S. Gyurcsik,et al.  Generation of performance sensitivities for analog cell layout , 1991, 28th ACM/IEEE Design Automation Conference.

[13]  S. W. Mehranfar.  A technology-independent approach to custom analog cell generation , 1991 .

[14]  Wesley E. Snyder,et al.  Range Image Restoration Using Mean Field Annealing , 1988, NIPS.