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基于LVDS传输可靠性优化设计
2022年电子技术应用第1期
杜凯旋1,焦新泉1,2,杨志文1,李辉景1
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
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。
中圖分類號: TN919
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.211811
中文引用格式: 杜凱旋,焦新泉,楊志文,等. 基于LVDS傳輸可靠性優(yōu)化設計[J].電子技術應用,2022,48(1):105-108,114.
英文引用格式: Du Kaixuan,Jiao Xinquan,Yang Zhiwen,et al. Optimized design based on LVDS transmission reliability[J]. Application of Electronic Technique,2022,48(1):105-108,114.
Optimized design based on LVDS transmission reliability
Du Kaixuan1,Jiao Xinquan1,2,Yang Zhiwen1,Li Huijing1
1.State Key Laboratory of Electronic Tecchnology,North University of China,Taiyuan 030051,China; 2.Key Laboratory of Instrument Science and Dynamic Testing(Ministry of Education), North University of China,Taiyuan 030051,China
Abstract: 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.
Key words : LVDS;link establishment;training frame;electrical isolation

0 引言

    隨著電子技術與通信技術的迅猛發(fā)展,高速率高幀頻的數據為并行傳輸帶來巨大挑戰(zhàn),面對高速并行傳輸帶來的偏移和干擾問題[1],低電壓差分信號(LOW-Voltage Differential Signaling,LVDS)憑借高速率、低功耗以及抗共模干擾性好等優(yōu)點,廣泛應用于軍事、科研、工業(yè)等各領域的數據傳輸通信[2]

    針對LVDS通信建鏈過程中出現的丟幀及誤碼現象,為了進一步提高LVDS傳輸鏈路的可靠性,本文對LVDS傳輸鏈路硬件物理層和軟件鏈路層進行研究,提出相應的優(yōu)化措施并加以驗證[3]。實際測試鏈路傳輸穩(wěn)定,可有效解決丟幀和誤碼問題。




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作者信息:

杜凱旋1,焦新泉1,2,楊志文1,李輝景1

(1.中北大學 電子測試技術國家重點實驗室,山西 太原030051;

2.中北大學 儀器科學與動態(tài)測試教育部重點實驗室,山西 太原030051)




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