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Clock tree construction using gated clock cloning

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4 Author(s)
Wun-Han Chen ; Dept. of Inf. & Comput. Eng., Chung Yuan Christian Univ., Chungli, Taiwan ; Hsin-Hung Chang ; Jui-Hung Hung ; Tsai-Ming Hsieh

Clock gating is one of the important techniques to achieve low power and small area in high-performance synchronous circuit design. In this paper, we propose a three-phase clock gating optimization methodology by using clustering and merging algorithm to construct a gated clock tree with minimal number of clock gating cells and buffers. In addition, according to the fan-out numbers of a clock gating cell, we derive a parameter γ that may be used to adjust the tradeoff between clock gating cell and buffer. The experimental results show that the number of clock gating cells and buffers reduced in each phase in our algorithm. Our solutions are better than greedy approach.

Published in:

Quality Electronic Design (ASQED), 2012 4th Asia Symposium on

Date of Conference:

10-11 July 2012

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