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基于多重网格方法的快速电源网格分析法
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2009-05-06
王银喜
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以电源网络节点之间的电气距离为基础，应用多重网格方法，提出了一种快速的电源网格分析器；设计了一个简单的限制和插值方案，速度收敛可以通过电气距离阀值和前/后段滤波迭代次数来控制。基于电源网格节点间电气距离方案的特点在于直观、简单、易于实现，实验结果较好地证明了该方法的可行性。Power grid analysis is an important issue for circuit design and verification. With the increasing number of transistors on a chip, the size of the power networks has grown so large as to make the verification task very challenging. Fast and memory-saving power analysis algorithms are needed. In this paper, we present a fast power grid analyzer using multigrid technique, which speed up the convergence of sparse iterative solver. we proposed a simple and intuitive restriction and interpolation scheme, which is based on the electric distance between the nodes in the power grid network. The convergence can be controlled by a user specified threshold parameter and pre/post smoothing iterations. Experimental results show the efficiency of the new method.
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