Novel Voltage Choice and Min-Cut Based Assignment for Dual-VDD System

Haiqi WANG  Sheqin DONG  Tao LIN  Song CHEN  Satoshi GOTO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E95-A   No.12   pp.2208-2219
Publication Date: 2012/12/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E95.A.2208
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Physical Level Design
dual-vdd,  min-cut,  voltage assignment,  low power,  timing constraints,  

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Dual-vdd has been proposed to optimize the power of circuits without violating the performance. In this paper, different from traditional methods which focus on making full use of slacks of non-critical gates, an efficient min-cut based voltage assignment algorithm concentrating on critical gates is proposed. And then this algorithm is integrated into a searching engine to auto-select rational voltages for dual-vdd system. Experimental results show that our search engine can always achieve good pair of dual-vdd, and our min-cut based algorithm outperformed previous works for voltage assignment both on power consumption and runtime.