现代电子技术2024，Vol.47Issue(8)：68-74,7.DOI:10.16652/j.issn.1004-373x.2024.08.011
ESD保护电路在HDMI板级信号完整性中的影响分析及其布局优化研究
Research on influence analysis and layout optimization of ESD protection circuits on signal integrity at HDMI board level
王淼 1李嘉豪 1汤浩 1郭亚1
作者信息
- 1. 江南大学 物联网工程学院 “轻工过程先进控制”教育部重点实验室,江苏 无锡 214122
- 折叠
摘要
Abstract
In order to solve the problem of signal integrity damage after HDMI is connected to ESD(electrostatic discharge)protection circuits,the effectegrity of HDMI signal is analyzed.Considering the influence of high-frequency parasitic parameters in transient voltage suppression(TVS),the ESD discharge model and TVS high frequency equivalent circuit model are established and their reliability is verified.The influence on signal integrity was studied from rotation angle and staggered distance of differential device access signal lines.Twenty-five sets of plate-level models with different angles and four sets of different staggered distances are designed,and S-parameter simulation is carried out under different transmission frequencies with different characteristics.Three representative spatial layout models,vertical,horizontal,and staggered,are selected.The S-parameter and the eye chart of the difference signal line were obtained by means of the finite element simulation.The simulation results show that,compared with the other two typical spatial layouts,the return loss and insertion loss of the vertical layout are reduced by 248.1%and 20.6%on average.The eye width and eye height of the eye chart are the largest among the three spatial layouts.The results provide layout optimization guidance for the analysis and design of PCB electrostatic discharge protection circuits.关键词
静电放电(ESD)/HDMI/信号完整性/空间布局优化/瞬态电压抑制(TVS)/S参数/有限元仿真Key words
ESD/HDMI/signal integrity/spatial layout optimization/TVS/S parameter/finite element simulation分类
信息技术与安全科学引用本文复制引用
王淼,李嘉豪,汤浩,郭亚..ESD保护电路在HDMI板级信号完整性中的影响分析及其布局优化研究[J].现代电子技术,2024,47(8):68-74,7.
