基于LVDS传输可靠性优化设计  

Optimized design based on LVDS transmission reliability

作　　者：杜凯旋 焦新泉[1,2] 杨志文 李辉景[1] Du Kaixuan;Jiao Xinquan;Yang Zhiwen;Li Huijing(State Key Laboratory of Electronic Tecchnology,North University of China,Taiyuan 030051,China;Key Laboratory of Instrument Science and Dynamic Testing(Ministry of Education),North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《电子技术应用》2022年第1期105-108,114,共5页Application of Electronic Technique

摘　　要：针对LVDS传输初始化建链过程中出现的首帧丢失和干扰导致的误建链问题,对链路传输机理及稳定性进行分析,并从硬件与软件两方面进行优化。软件上采取识别帧头和发送训练帧的方法,改善建链过程;硬件上选用性能更好的隔离芯片,优化差分端阻抗,减小干扰对数据传输的影响。经多次试验证明,优化后的链路可实现480 Mb/s速率下的可靠传输,该优化设计对提高LVDS链路传输稳定性和减少误码方面具有很好的参考价值。Aiming at the problem of the first frame loss and the mis-establishment of the link caused by the interference during the initial link establishment of LVDS transmission,this paper analyzes the link transmission mechanism and stability,and optimizes it from both hardware and software aspects.The software adopts the method of identifying the frame header and sending the training frame to improve the link building process.The hardware chooses a better performance electriciacl isolation chip and optimizes the differential terminal impedance to reduce the impact of interference on data transmission.Many tests have proved that the optimized link can achieve reliable transmission at a rate of 480 Mb/s.This optimized design has a good reference value for improving the transmission stability of the LVDS link and reducing errors.

关 键 词：LVDS 链路建立 训练帧 电气隔离 

分 类 号：TN919[电子电信—通信与信息系统]