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在物理设计过程中,进行精细布线前,希望对基于网线上接点界盒的互连延迟、每一长度的电容-电阻之水平垂直估算值限界,还希望根据限界盒内和限界盒上的接点之位置估算出接点-接点间的延迟。假定互连线将基于直线斯坦尼树(RST)进行布线,F.K.Chung和F.H.Hwang的研究工作(1979)被用来限界给出线网上限界盒的可能最大/最小RST(这适合于≤10个接点的线网或接点数为二次幂的大量接点的线网)。于是发现,对一个线网来说,Elmore延迟表达式包括两部份:即输出驱动电阻和总线网函数项以及线网拓朴学函数项(最终RC互连树的电阻特性)。这样,便推导出RC互连延迟的界限。利用内部线网接点位置及其知识,就把接点与RC树的输出和
In the physical design process, before the fine wiring, it is hoped that based on the interconnection delay of the wire junction box, each length of the capacitance-resistance horizontal and vertical estimate of the limit, it is also desirable to limit the box and the junction box on the limit The position estimates the contact - delay between contacts. Assuming that interconnects will be routed based on a straight-line stanley tree (RST), the work of FK Chung and FH Hwang (1979) was used to delimit the maximum / minimum RST that would give a bounding box on the net (which is suitable for ≤10 contacts Of the line network or contacts for the second power of a large number of contacts of the network). The Elmore delay expression was then found to consist of two parts for a net: the output drive resistance and bus net function terms, and the net topology function terms (the final RC interconnect tree’s resistance characteristics). In this way, the limit of RC interconnection delay is deduced. The use of internal network contacts and their knowledge of the location, put the contacts and RC tree output and