桂林电子科技大学学报2024，Vol.44Issue(4)：401-408,8.DOI:10.3969/1673-808X.2023153
基于22 nm工艺的GNSS芯片片上偏差的时序分析
Timing analysis of on-chip variation for GNSS chips based on the 22 nm process
摘要
Abstract
Static timing analysis holds a crucial position in the realm of chip design.In the static timing analysis under the 22nm pro-cess,adopting the traditional on-chip variation(OCV)method will lead to problems such as inaccurate timing,unstable performance,and decreased design robustness.In order to improve the timing accuracy of the design and shorten its design cycle.An analysis method for a GNSS navigation chip based on 22 nm technology is proposed.The ICC2 tool is employed for layout and routing,while PrimeTime is used for static timing analysis.The design replaces fixed global parameters with local parameters following nor-mal distribution,uses parametric on-chip variation(POCV)technology combined with path-based analysis(PBA)to model.Experi-mental results demonstrate that the method combines parametric on-chip deviation and path modeling.When compared to advanced on-chip deviation technology,it shows significant improvements:the worst negative slack(WNS)is optimized by approximately 56.2％,the total negative slack(TNS)is enhanced by around 82.2％,and the overall violation path count is reduced by 58.7％.This leads to substantial savings in timing analysis time,with an efficiency gain of up to 50.8％.This effectively demonstrates the strengths and weaknesses of the combined approach of POCV and PBA,leading to improved timing accuracy and shortened design cycle.关键词
22 nm工艺/静态时序分析/先进式片上偏差/参数式片上偏差/路径分析模式Key words
22 nm process/STA/AOCV/POCV/PBA mode分类
信息技术与安全科学引用本文复制引用
符强,黄三峰,纪元法,肖有军,屈康杰,梁家瑞..基于22 nm工艺的GNSS芯片片上偏差的时序分析[J].桂林电子科技大学学报,2024,44(4):401-408,8.基金项目
国家自然科学基金(62061010,62161007) （62061010,62161007）
广西科技厅项目(桂科AA20302022,桂科AB21196041,桂科AB22035074,桂科AD22080061) （桂科AA20302022,桂科AB21196041,桂科AB22035074,桂科AD22080061）
桂林市科技项目(20210222-1) （20210222-1）
广西高校中青年教师科研基础能力提升项目(2022KY0181) （2022KY0181）
广西精密导航与应用重点实验室开放基金(DH202215,PT22001P) （DH202215,PT22001P）
