NDLI: Practical repeater insertion for low power: What repeater library do we need?

Content Provider	IEEE Xplore Digital Library
Author	Xun Liu Yuantao Peng Papaefthymiou, M.C.
Copyright Year	2004
Description	Author affiliation: North Carolina State University, Raleigh, NC (Xun Liu)
Abstract	In this paper, we investigate the problem of repeater insertion for low power under a given timing budget. We propose a novel repeater insertion algorithm to compute the optimal repeater number and width in the discrete solution space, as defined by a given repeater library. Using our algorithm, we show that rounding the solution under the continuity assumption to the closest discrete solution candidate may result in suboptimal designs, or it may even fail to find an existing solution. Given a certain tolerance to the degradation of repeater power dissipation, we address two practical and highly important questions: (1) How coarse could the repeater size granularity be? (2) What range should the repeater size be in? Experimental results demonstrate the high effectiveness of the proposed scheme and provide valuable insights into repeater library design. Our approach achieves up to 23% power reduction in comparison to rounding-based approaches. With a 4% power degradation tolerance, repeater size granularity as coarse as 81 can be used, reducing the library size by more than 87%. For interconnects with various wire lengths and timing targets, our investigation reveals that the range of optimal repeater sizes for low-power is limited, indicating that a low-cost small-size repeater library, if well designed, is adequate to provide high quality repeater insertion solutions.
Starting Page	30
Ending Page	35
File Size	510742
Page Count	6
File Format	PDF
ISBN	1511838288
ISSN	0738100X
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Association for Computing Machinery, Inc. (ACM)
Subject Keyword	Repeaters Libraries Timing Power dissipation Integrated circuit interconnections Design automation Power engineering computing Degradation Permission Flexible printed circuits
Content Type	Text
Resource Type	Article

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