中圖分類號：TN402 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.250805 中文引用格式： 張瑾，孫光超，張建國，等. 基于Cadence軟件平臺的分布式電源噪聲仿真方法研究[J]. 電子技術應用，2025，51(8)：27-30. 英文引用格式： Zhang Jin，Sun Guangchao，Zhang Jianguo，et al. Research on distributed power network noise simulation methodology based on the Cadence software platform[J]. Application of Electronic Technique，2025，51(8)：27-30.
Research on distributed power network noise simulation methodology based on the Cadence software platform
Abstract： To reduce the modeling time for extracting power S-parameters using PowerSI, improve the accuracy of power supply simulations for internal functional modules in chips, and further identify power supply noise in sensitive regions, a distributed modeling method based on package power supply and a determination approach for practical noise measurement points were introduced. Applying this method to study power supply simulations of functional modules within a system processor chip, it was discovered that in time-domain power supply noise simulations, functionally similar power modules under the same data flow exhibit similarity in generated noise characteristics. Building on this observation, a distributed power supply model was established to group functionally analogous power modules. The grouped package power S-parameter models and die-level RC models were then integrated into time-domain power supply noise simulations. Based on simulation results, the locations of sensitive noise measurement points at package bumps were determined. Comparative simulations and measurements demonstrated that under alignment of main frequency components in the noise frequency domain, the time-domain simulation-measurement error remains below 6%, validating the effectiveness of the proposed distributed simulation methodology.
Key words : distributed parameter extraction；noise test point；simulation-test correlation analysis
