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Placement with Symmetry Constraints for Analog IC Layout Design Based on Tree Representation

机译:基于树表示的具有对称约束的模拟IC布局设计布局

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Symmetry constrains are the constraints that the given cells should be placed symmetrically in design of analog ICs. We use O-tree to represent placements and propose a decoding algorithm which can obtain one of the minimum placements satisfying the constraints. The decoding algorithm uses linear programming, which is too much time consuming. Therefore we propose a graph based method to recognize if there exists no placement satisfying both the given symmetry and O-tree constraints, and use the method before application of linear programming. The effectiveness of the proposed method was shown by computational experiments.
机译:对称约束是在模拟IC设计中应将给定单元对称放置的约束。我们使用O树表示布局,并提出了一种解码算法,该算法可以获取满足约束条件的最小布局之一。解码算法使用线性编程,这非常耗时。因此,我们提出了一种基于图的方法来识别是否不存在满足给定对称性和O树约束的位置,并在应用线性规划之前使用该方法。通过计算实验证明了该方法的有效性。

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