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基于LVDS傳輸可靠性優(yōu)化設(shè)計
2022年電子技術(shù)應用第1期
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(shù)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
摘要: 針對LVDS傳輸初始化建鏈過程中出現(xiàn)的首幀丟失和干擾導致的誤建鏈問題,對鏈路傳輸機理及穩(wěn)定性進行分析,并從硬件與軟件兩方面進行優(yōu)化。軟件上采取識別幀頭和發(fā)送訓練幀的方法,改善建鏈過程;硬件上選用性能更好的隔離芯片,優(yōu)化差分端阻抗,減小干擾對數(shù)據(jù)傳輸?shù)挠绊?。?jīng)多次試驗證明,優(yōu)化后的鏈路可實現(xiàn)480 Mb/s速率下的可靠傳輸,該優(yōu)化設(shè)計對提高LVDS鏈路傳輸穩(wěn)定性和減少誤碼方面具有很好的參考價值。
關(guān)鍵詞: LVDS 鏈路建立 訓練幀 電氣隔離
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(shè)計[J].電子技術(shù)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(shù)與通信技術(shù)的迅猛發(fā)展,高速率高幀頻的數(shù)據(jù)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(lǐng)域的數(shù)據(jù)傳輸通信[2]。

    針對LVDS通信建鏈過程中出現(xiàn)的丟幀及誤碼現(xiàn)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(shù)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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