电子学报2025，Vol.53Issue(7)：2428-2440,13.DOI:10.12263/DZXB.20241149
基于动态电容的复合电流源阶段延时计算方法
Composite Current Source Stage Delay Calculation Method Based on Dynamic Capacitance
摘要
Abstract
With the deep sub-micron technology in integrated circuit develops,Miller effect becomes non-negligible and the increasing interconnection resistivity increases,leading to increased delay time prediction inaccuracy.A composite current source stage delay calculation method based on dynamic capacitance is proposed in this paper.A voltage-based in-terpolation method is firstly introduced to support the delay calculation of composite current source.A cell delay calculation method with a Π model load is then established and a multi-threshold analysis is used to improves the effective capacitance,derives the dynamic capacitance and realizes the iterative calculation process.The dynamic capacitance concept is applied to the stage delay calculation,and used to realize the stage delay calculation method with distributed RC network as the load.By using machine learning,the interconnect wire delay is further optimized.Based on the ASAP 7 nm predictive PDK(ASAP 7)technology,the stage delay calculation method proposed in this paper achieves an average relative error of 1.49%,3.16%,1.70%,and 0.88%for the cell delay,cell transition time,interconnect line delay,and interconnect line transi-tion time,respectively,compared with simulation program with integrated circuit emphasis(SPICE)simulation,the stage delay calculation method reaches convergence with about 4～5 iterations.关键词
时序模型/阶段延时计算/复合电流源模型/米勒效应/动态电容Key words
delay model/stage delay calculation/composite current source model/miller effect/dynamic capaci-tance分类
信息技术与安全科学引用本文复制引用
郭静静,查佩文,张树钢,蔡志匡..基于动态电容的复合电流源阶段延时计算方法[J].电子学报,2025,53(7):2428-2440,13.基金项目
江苏省自然科学基金(No.BK20240637) Natural Science Foundation of Jiangsu Province(No.BK20240637) （No.BK20240637）
