改进的RLC互连线延时估算方法  

Improved delay estimation method for RLC interconnects

作　　者：周郭飞[1] 金德鹏[1] 曾烈光[1] 

机构地区：[1]清华大学电子工程系,微波与数字通信技术国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第1期46-50,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(90607009)

摘　　要：为了提高超大规模集成电路中全局互连线延时估算的精度,提出了一种基于RLC模型延时估算的方法。该方法将互连系统中的延时分为2部分:电磁波传输延时和波形上升沿延时,并分别进行估算。计算出电磁波传输延时,并消除其对原传输函数的影响得到一个新的传输函数。利用一种稳定的二阶RLC模型对新传输函数进行逼近,估算出波形上升沿延时。实验结果表明:该方法在后者远大于前者的时候,其估算结果至少能保证和传统方法有相同的精度。而在两者大小相当的情况下,该方法能够较大地提高对延时估算的精度。The accuracy of global interconnect delay predictions in integrated circuits can be improved by RLC（resistance inductance capacitance） model presented in this paper. The total interconnect delay can be divided into the electromagnetic propagation delay and the interconnect rise time delay. In a system with transmission lines, the electromagnetic propagation delay must be calculated first with a new system then derived without this delay. Then, a stable two-order RLC model is used to approximate the new system to estimate the rise time delay. Simulation results show that the method has the same accuracy with traditional methods when the electromagnetic propagation delay is much smaller than the rise time delay and is more accurate when the two are of the same order.

关 键 词：互连线 RLC模型 延时估计 

分 类 号：TN405.97[电子电信—微电子学与固体电子学]