以某高速實時頻譜儀為應(yīng)用背景,論述了5 Gsps采樣率的高速數(shù)據(jù)采集系統(tǒng)的構(gòu)成和設(shè)計要點,著重分析了采集系統(tǒng)的關(guān)鍵部分高速ADC(analog to digital,模數(shù)轉(zhuǎn)換器)的設(shè)計、系統(tǒng)采樣時鐘設(shè)計、模數(shù)混合信號完整性設(shè)計、電磁兼容性設(shè)計和基于總線和接口標準(PCI Express)的數(shù)據(jù)傳輸和處理軟件設(shè)計。在實現(xiàn)了系統(tǒng)硬件的基礎(chǔ)上,采用Xilinx公司ISE軟件的在線邏輯分析儀(ChipScope Pro)測試了ADC和采樣時鐘的性能,實測表明整體指標達到設(shè)計要求。給出上位機對采集數(shù)據(jù)進行處理的結(jié)果,表明系統(tǒng)實現(xiàn)了數(shù)據(jù)的實時采集存儲功能。
標簽: Gsps 高速數(shù)據(jù) 采集系統(tǒng)
上傳時間: 2014-11-26
上傳用戶:黃蛋的蛋黃
電子發(fā)燒友網(wǎng)為大家提供了新一代高速定位模塊QD75M詳解,希望看完之后你對高速定位模塊QD75M有一個全面的認識。
上傳時間: 2013-10-22
上傳用戶:stvnash
訊號路徑設(shè)計講座(9)針對高速應(yīng)用的電流回授運算放大器電流回授運算放大器架構(gòu)已成為各類應(yīng)用的主要解決方案。該放大器架構(gòu)具有很多優(yōu)勢,并且?guī)缀蹩蓪嵤┯谌魏涡枰\算放大器的應(yīng)用當中。電流回授放大器沒有基本的增益頻寬產(chǎn)品的局限,隨著訊號振幅的增加,而頻寬損耗依然很小就證明了這一點。由于大訊號具有極小的失真,所以在很高的頻率情況下這些放大器都具有極佳的線性度。電流回授放大器在很寬的增益范圍內(nèi)的頻寬損耗很低,而電壓回授放大器的頻寬損耗卻隨著增益的增加而增加。準確地說就是電流回授放大器沒有增益頻寬產(chǎn)品的限制。當然,電流回授放大器也不是無限快的。變動率受制于晶體管本身的速度限制(而非內(nèi)部偏置(壓)電流)。這可以在給定的偏壓電流下實現(xiàn)更大的變動率,而無需使用正回授和其它可能影響穩(wěn)定性的轉(zhuǎn)換增強技術(shù)。那么,我們?nèi)绾蝸斫⑦@樣一個奇妙的電路呢?電流回授運算放大器具有一個與差動對相對的輸入緩沖器。輸入緩沖器通常是一個射極追隨器或類似的器件。非反向輸入是高阻抗的,而緩沖器的輸出(即放大器的反向輸入)是低阻抗的。相反,電壓回授放大器的2個輸入均是高阻抗的。電流回授運算放大器輸出的是電壓,而且與透過稱為互阻抗Z(s)的復(fù)變函數(shù)流出或流入運算放大器的反向輸入端的電流有關(guān)。在直流電情況下,互阻抗很高(與電壓回授放大器類似),并且隨著頻率的增加而單極滾降。
上傳時間: 2013-10-19
上傳用戶:黃蛋的蛋黃
高速數(shù)字系統(tǒng)設(shè)計下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the reader through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedmeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the reader not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the reader will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all thebackground required to apply the formulas in this book.
上傳時間: 2013-10-26
上傳用戶:縹緲
ICL8038 單片函數(shù)發(fā)生器
標簽: 8038 ICL 函數(shù)發(fā)生器
上傳時間: 2014-12-23
上傳用戶:wushengwu
運行典型高速ADC評估板設(shè)置
上傳時間: 2013-10-22
上傳用戶:ly1994
采用高輸入頻率、高速模數(shù)轉(zhuǎn)換器(ADC)的系統(tǒng)設(shè)計是一項具挑戰(zhàn)性的任務(wù)。ADC輸入接口設(shè)計有6個主要條件:輸入阻抗、輸入驅(qū)動、帶寬、通帶平坦度、噪聲和失真。
上傳時間: 2013-10-21
上傳用戶:chukeey
高速數(shù)據(jù)轉(zhuǎn)換器評估平臺(HSDCEP)是基于PC的平臺,提供評估Maxim RF數(shù)/模轉(zhuǎn)換器(RF-DAC,支持更新速率≥ 1.5Gsps)和Maxim數(shù)字上變頻器(DUC)的齊全工具。HSDCEP可以在每對數(shù)據(jù)引腳產(chǎn)生速率高達1.25Gbps的測試碼型,支持多達4條并行16位LVDS總線。通過USB 2.0端口將最長64兆字(Mw)、每字16位寬的數(shù)據(jù)碼型裝載至HSDCEP存儲器
標簽: HSDCEP 高速數(shù)據(jù) 轉(zhuǎn)換器 評估平臺
上傳時間: 2013-10-25
上傳用戶:zycidjl
PADS-2007高速電路板設(shè)計
上傳時間: 2013-10-09
上傳用戶:hanli8870
高速高頻PCB走線精品設(shè)計指南 八套連發(fā)
上傳時間: 2013-11-05
上傳用戶:teddysha
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