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基于JESD204B接口的波形產(chǎn)生FPGA設(shè)計
電子技術(shù)應(yīng)用
付然,孫晨陽,,劉芳,杜思航,,馬瑞山
中國電子科技集團公司第五十八研究所
摘要: 提出了一種基于JESD204B接口的波形產(chǎn)生的FPGA設(shè)計方案,該設(shè)計主要由FPGA,、DAC,、DDR3以及網(wǎng)口芯片組成,實現(xiàn)產(chǎn)生雙通道,、頻率范圍為2 GHz~3.5 GHz的中頻信號,。FPGA與DAC由高速串行接口JESD204B進行連接,實現(xiàn)雙通道的波形產(chǎn)生,、數(shù)字上變頻及數(shù)模轉(zhuǎn)換,,網(wǎng)口芯片與DDR3用于傳輸和存儲一些特殊數(shù)字波形。詳細介紹了JESD204B接口時鐘同步,、DDS信號發(fā)生器、數(shù)字波形接收,、緩存和發(fā)送等關(guān)鍵功能的設(shè)計,。最后通過頻譜分析儀抓捕DAC輸出的中頻信號驗證了FPGA設(shè)計的可靠性。
中圖分類號:TN710 文獻標志碼:A DOI: 10.16157/j.issn.0258-7998.234746
中文引用格式: 付然,,孫晨陽,,劉芳,等. 基于JESD204B接口的波形產(chǎn)生FPGA設(shè)計[J]. 電子技術(shù)應(yīng)用,,2024,,50(7):103-106.
英文引用格式: Fu Ran,Sun Chenyang,,Liu Fang,,et al. FPGA design for waveform generation based on JESD204B interface[J]. Application of Electronic Technique,2024,,50(7):103-106.
FPGA design for waveform generation based on JESD204B interface
Fu Ran,,Sun Chenyang,Liu Fang,,Du Sihang,,Ma Ruishan
The 58th Institute of China Electronics Technology Corporation
Abstract: An FPGA design for waveform generation based on JESD204B interface is introduced. This design mainly consists of FPGA, DAC, DDR3 and network chips, and realizes the generation of intermediate frequency signals with dual channel frequency range of 2 GHz to 3.5 GHz. FPGA and DAC are linked through high-speed serial interface JESD204B, realizing waveform generation, digital up-conversion and analog conversion, network chips and DDR3 are used for transmitting and storing special waveforms. The article provides a detailed introduction to key technologies such as JESD204B interface clock synchronization design, DDS signal generator, digital waveform reception, storage, and transmission. Finally, the reliability of the FPGA design is verified by the intermediate frequency signal captured by the DAC output through a spectrum analyzer.
Key words : JESD204B,;high speed serial transmission;UDP protocol,;RGMII interface

引言

波形發(fā)生器是測試系統(tǒng)中常用的信號源,,更高的采樣率、通道間同步精度以及通道定時能力一直是波形發(fā)生器的發(fā)展方向[1],。作為核心器件的 DAC[2]目前廣泛采用 JESD204B 接口以適應(yīng)高采樣率所對應(yīng)的高數(shù)據(jù)速率,。JESD204B的物理層基于SerDes架構(gòu)實現(xiàn),優(yōu)勢在于簡化系統(tǒng)設(shè)計復(fù)雜度,,精簡PCB 布局布線,,擴展能力強等。本文利用 FPGA 的硬件可編程,、運行速度快,、穩(wěn)定可靠、高速收發(fā)器支持JESD204B 協(xié)議的特點[3],,將FPGA與DAC 結(jié)合使用,,實現(xiàn)雙通道發(fā)射信號的波形產(chǎn)生、數(shù)字上變頻及數(shù)模轉(zhuǎn)換,,產(chǎn)生2路頻率范圍為2 GHz~3.5 GHz的中頻信號,。


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作者信息:

付然,孫晨陽,,劉芳,,杜思航,馬瑞山

(中國電子科技集團公司第五十八研究所,,江蘇 無錫210000)


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