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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 32-823
Full Name: Chia-Chun Tsai
Position: Professor
Age: ON
Sex: Male
Address: 32 Chung Keng Li, Dalin
Country: TAIWAN
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E-mail address: chun@mail.nhu.edu.tw
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Title of the Paper: Zero-Skew Upward Propagation Based on Numerical Tapping Point Search for RLC Clock Tree Construction
Authors as they appear in the Paper: Chia-Chun Tsai, Jan-Ou Wu and Trong-Yen Lee
Email addresses of all the authors: chun@mail.nhu.edu.tw, janou@ms42.hinet.net, tylee@ntut.edu.tw
Number of paper pages: 10
Abstract: In this paper, we propose a numerical tapping point search based on the model of uniformly distributed RLC wires for constructing an RLC clock tree. A tapping point for two subtrees based on the numerical reduction of the model is always determined for exact zero skew. The characteristic of zero-skew upward propagation for two hierarchical subtrees with bottom-up recursion is proved in a multi-level clock tree. The proposed approach associates DME or MMM method that can construct an exact zero-skew RLC clock tree. IBM and MCNC benchmarks are evaluated by the approach. Experimental results show that we always get zero-skew clock trees in pretty fast run time compared with other approaches. Moreover, the results in terms of clock delay have a small tolerance of 0.385% on average compared with Hspice¡¦s simulation.
Keywords: Clock tree, zero skew, numerical tapping point search, RLC delay model.
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