摘要
For performance optimization such as placement,interconnect synthesis,and routing, an efficient and accurate interconnect delay metric is critical,even in design tools development like design for yield （DFY） and design for manufacture （DFM）. In the nanometer regime, the recently proposed delay models for RLC interconnects based on statistical probability density function （PDF）interpretation such as PRIMO,H-gamma,WED and RLD bridge the gap between accuracy and efficiency. However, these models always require table look-up when operating. In this paper, a novel delay model based on the Birnbaum-Saunders distribution （BSD） is presented. BSD can accomplish interconnect delay estimation fast and accurately without table look-up operations. Furthermore, it only needs the first two moments to match. Experimental results in 90nm technology show that BSD is robust, easy to implement,efficient,and accurate.
基于统计概率分布的互连时延模型具有效率高、准确性好的特点,但此类方法往往包含一些查表运算.本文提出了一种基于Birnbaum-Saunders分布的互连线时延模型,避免了查表运算,且仅需要采用前两个瞬态,计算简单,准确性较好,并提出了一种精度修正算法,使该方法具有更好的适应性.
