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Pulsed-latch-based clock tree migration for dynamic power reduction

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3 Author(s)
Hong-Ting Lin ; Dept. of Comput. Sci. & Inf. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Yi-Lin Chuang ; Tsung-Yi Ho

Minimizing the clock tree has been known as an effective approach to reduce power dissipation in modern circuit designs. However, most existing power-aware clock tree synthesis algorithms still focus on optimizing power in flip-flops, which might have limited power savings. In this work, we explore the pulsed-latch utilization in clock tree synthesis for further power savings. We are the first work in the literature to propose a novel synthesis algorithm to efficiently migrate a flip-flop-based clock tree into a pulsed-latch one. To maintain performance of a clock tree while considering load balance (skew issues) simultaneously, we determine the clock tree topology by the minimum-cost maximum-flow network. Experimental results show that our algorithm can further reduce power consumption by 22% on average compared to approaches without pulsed latches.

Published in:

Low Power Electronics and Design (ISLPED) 2011 International Symposium on

Date of Conference:

1-3 Aug. 2011

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