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Symmetry-aware analog layout placement design handling substrate-sharing constraints

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2 Author(s)
Rui He ; Memorial Univ. of Newfoundland, St. John''s, NL, Canada ; Lihong Zhang

This paper presents a solution to handling the symmetry and substrate-sharing constraints in the placement design using transitive closure graph (TCG) representation for analog layouts. We propose a new contour-based packing scheme to implement substrate-sharing constraints with the time complexity of O(p· n·lgn), where p is the number of symmetry groups and n is the number of the placed cells. Furthermore, a set of perturbation operations are devised with the time complexity of O(n) in order to generate a new random symmetric-feasible TCG state. Our experimental results show the effectiveness of this approach compared to other competitive placement algorithms.

Published in:

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Date of Conference:

May 30 2010-June 2 2010

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