Improved method of cell placement with symmetry constraints for analog IC layout design

  title={Improved method of cell placement with symmetry constraints for analog IC layout design},
  author={Shinichi Kouda and Chikaaki Kodama and Kunihiro Fujiyoshi},
Recently, it is often required in high performance analog IC design that some cells are placed symmetrically to horizontal or vertical axis. Balasa et al. proposed a method of obtaining the closest placement satisfying the given symmetry constraints and the topology constraints imposed by a sequence-pair, but this method has the following defects: (1) Some cells overlap each other. (2) The closest cell placement satisfying both the symmetry and topology constraints may not be obtained. (3) How… CONTINUE READING
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