A Comparative Study on Multisource Clock Network Synthesis
semanticscholar（2016）
Abstract
Hybrid clock architecture offers a compromise between tree and mesh. While most of the relative works focus on tree-driven-mesh configuration, we are interested in the performance and optimization of multisource CTS flow provided by a state-of-the-art commercial tool, which applies a coarse mesh with local sub-trees. In this study, we analyze the QoR of conventional clock tree and multisource CTS on a real industrial design. We also propose several heuristic approaches to improving the performance of multisource CTS, especially for skew optimization. According to the experimental results, we reveal the benefits and drawbacks of each method, give some guidelines for determining the proper configuration for a design, and then summarize some future research directions.
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