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📁 上海交通大学DSP学习的经典教程 文档为HTML格式,循序渐进,方便学习 本人从中收益菲浅,拿来共享
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<html><head><title>饮水思源精华区</title><Content-type: text/html; charset=gb2312><link rel=stylesheet type=text/css href="bbsdl.css"></head><table cellspacing=0 class=title width=90%><th class=title align=left width=20%>饮水思源站</th><th class=title align=center width=60%>文章阅读</th><th class=title align=right width=20%>精华区离线浏览</th></tr></table><hr><table align=center cellspacing=1 class=doc><tr><td>发信人:&nbsp;fangf&nbsp;(方方),&nbsp;信区:&nbsp;DSP<br>标&nbsp;&nbsp;题:&nbsp;高分辨率A/D变换器应用考虑(三)<br>发信站:&nbsp;饮水思源站&nbsp;(Sat&nbsp;Jun&nbsp;&nbsp;5&nbsp;10:22:55&nbsp;1999)&nbsp;,&nbsp;站内信件<br>----&nbsp;∑&nbsp;Δ&nbsp;变&nbsp;换&nbsp;器&nbsp;利&nbsp;用&nbsp;信&nbsp;号&nbsp;和&nbsp;它&nbsp;的&nbsp;附&nbsp;加&nbsp;噪&nbsp;声&nbsp;之&nbsp;间&nbsp;的&nbsp;关&nbsp;系，&nbsp;因&nbsp;<br>为&nbsp;信&nbsp;号&nbsp;的&nbsp;一&nbsp;个&nbsp;取&nbsp;样&nbsp;和&nbsp;短&nbsp;时&nbsp;间&nbsp;后&nbsp;的&nbsp;另&nbsp;一&nbsp;次&nbsp;取&nbsp;样&nbsp;将&nbsp;互&nbsp;相&nbsp;统&nbsp;调。&nbsp;<br>这&nbsp;两&nbsp;个&nbsp;信&nbsp;号&nbsp;的&nbsp;相&nbsp;加&nbsp;有&nbsp;利&nbsp;于&nbsp;互&nbsp;相&nbsp;加&nbsp;强。&nbsp;当&nbsp;信&nbsp;号&nbsp;中&nbsp;的&nbsp;噪&nbsp;声&nbsp;重&nbsp;复&nbsp;<br>同&nbsp;样&nbsp;的&nbsp;情&nbsp;况&nbsp;时，&nbsp;噪&nbsp;声&nbsp;信&nbsp;号&nbsp;取&nbsp;样&nbsp;有&nbsp;利&nbsp;于&nbsp;彼&nbsp;此&nbsp;互&nbsp;相&nbsp;去&nbsp;消&nbsp;掉&nbsp;少&nbsp;量&nbsp;<br>噪&nbsp;声。&nbsp;<br><br>----&nbsp;高&nbsp;分&nbsp;辩&nbsp;率&nbsp;多&nbsp;通&nbsp;道A/D&nbsp;变&nbsp;换&nbsp;器&nbsp;子&nbsp;系&nbsp;统&nbsp;由&nbsp;单&nbsp;通&nbsp;道A/D&nbsp;变&nbsp;换&nbsp;器&nbsp;器&nbsp;<br>件&nbsp;板&nbsp;构&nbsp;成。&nbsp;通&nbsp;常，&nbsp;单A/D&nbsp;变&nbsp;换&nbsp;器&nbsp;芯&nbsp;片&nbsp;适&nbsp;用&nbsp;于&nbsp;每&nbsp;一&nbsp;个&nbsp;数&nbsp;据&nbsp;通&nbsp;道&nbsp;<br>板，&nbsp;因&nbsp;为&nbsp;采&nbsp;集&nbsp;率&nbsp;远&nbsp;远&nbsp;低&nbsp;于&nbsp;较&nbsp;低&nbsp;分&nbsp;辩&nbsp;率&nbsp;变&nbsp;换&nbsp;器&nbsp;的。&nbsp;<br><br><br>----&nbsp;小&nbsp;心&nbsp;装&nbsp;配&nbsp;<br><br>----&nbsp;用&nbsp;高&nbsp;分&nbsp;辩&nbsp;率&nbsp;实&nbsp;现A/D&nbsp;板，&nbsp;其&nbsp;芯&nbsp;片&nbsp;在&nbsp;板&nbsp;上&nbsp;的&nbsp;装&nbsp;配&nbsp;和&nbsp;连&nbsp;线&nbsp;不&nbsp;<br>是&nbsp;一&nbsp;简&nbsp;单&nbsp;的&nbsp;事&nbsp;情。&nbsp;必&nbsp;须&nbsp;小&nbsp;于&nbsp;构&nbsp;成&nbsp;板&nbsp;的&nbsp;每&nbsp;一&nbsp;部&nbsp;分&nbsp;以&nbsp;保&nbsp;证&nbsp;不&nbsp;经&nbsp;<br>过&nbsp;模&nbsp;拟&nbsp;或&nbsp;数&nbsp;字&nbsp;地&nbsp;线&nbsp;感&nbsp;应&nbsp;或&nbsp;高&nbsp;速&nbsp;电&nbsp;路&nbsp;信&nbsp;号&nbsp;线&nbsp;不&nbsp;耦&nbsp;合&nbsp;噪&nbsp;声&nbsp;进&nbsp;入&nbsp;<br>灵&nbsp;敏&nbsp;的A/D&nbsp;芯&nbsp;片。&nbsp;<br><br><br>----&nbsp;高&nbsp;速&nbsp;时&nbsp;钟&nbsp;线&nbsp;对&nbsp;于&nbsp;∑&nbsp;Δ&nbsp;变&nbsp;换&nbsp;器&nbsp;显&nbsp;得&nbsp;特&nbsp;别&nbsp;重&nbsp;要。&nbsp;∑&nbsp;Δ&nbsp;芯&nbsp;片&nbsp;<br>一&nbsp;般&nbsp;需&nbsp;要&nbsp;用10MHz&nbsp;范&nbsp;围&nbsp;的&nbsp;时&nbsp;钟，&nbsp;所&nbsp;希&nbsp;望&nbsp;的&nbsp;噪&nbsp;声&nbsp;带&nbsp;宽&nbsp;是&nbsp;在&nbsp;几&nbsp;百&nbsp;<br>赫&nbsp;兹&nbsp;内。&nbsp;在&nbsp;此&nbsp;速&nbsp;率&nbsp;下&nbsp;破&nbsp;坏24&nbsp;位&nbsp;电&nbsp;压&nbsp;分&nbsp;辩&nbsp;率&nbsp;的&nbsp;性&nbsp;能&nbsp;特&nbsp;性&nbsp;的&nbsp;机&nbsp;<br>会&nbsp;是&nbsp;很&nbsp;多&nbsp;的。&nbsp;<br><br>----&nbsp;消&nbsp;除&nbsp;高&nbsp;速&nbsp;莫&nbsp;明&nbsp;其&nbsp;妙&nbsp;故&nbsp;障&nbsp;的&nbsp;影&nbsp;响&nbsp;和&nbsp;在&nbsp;输&nbsp;入&nbsp;偏&nbsp;移&nbsp;它&nbsp;们&nbsp;影&nbsp;响&nbsp;<br>的&nbsp;关&nbsp;键&nbsp;是&nbsp;有&nbsp;效&nbsp;地&nbsp;使&nbsp;用&nbsp;去&nbsp;耦&nbsp;技&nbsp;术。&nbsp;为&nbsp;了&nbsp;有&nbsp;效，&nbsp;重&nbsp;要&nbsp;的&nbsp;是&nbsp;在&nbsp;电&nbsp;<br>源&nbsp;引&nbsp;脚&nbsp;小&nbsp;心&nbsp;设&nbsp;置&nbsp;芯&nbsp;片&nbsp;电&nbsp;容&nbsp;器。&nbsp;假&nbsp;若&nbsp;存&nbsp;在&nbsp;来&nbsp;自PC&nbsp;和&nbsp;其&nbsp;他&nbsp;设&nbsp;备&nbsp;<br>的&nbsp;杂&nbsp;散RF&nbsp;场，&nbsp;则&nbsp;使&nbsp;用Faraday&nbsp;罩。&nbsp;<br><br>----&nbsp;InteractiveCircuits&nbsp;and&nbsp;Systems&nbsp;公&nbsp;司&nbsp;的ICS-110B&nbsp;采&nbsp;用Crystal&nbsp;<br>Semiconductor&nbsp;公&nbsp;司&nbsp;的24&nbsp;位A/D&nbsp;变&nbsp;换&nbsp;器&nbsp;芯&nbsp;片CS5397（&nbsp;一&nbsp;种&nbsp;七&nbsp;阶&nbsp;∑&nbsp;Δ&nbsp;变&nbsp;<br>换&nbsp;器）。ICS-110B&nbsp;是&nbsp;设&nbsp;计&nbsp;支&nbsp;持&nbsp;在&nbsp;单VME&nbsp;总&nbsp;线&nbsp;封&nbsp;装&nbsp;中&nbsp;高&nbsp;达576&nbsp;个&nbsp;采&nbsp;集&nbsp;<br>通&nbsp;道&nbsp;的&nbsp;一&nbsp;个&nbsp;子&nbsp;系&nbsp;统。&nbsp;单&nbsp;个ICS-110B&nbsp;板&nbsp;以100kHz/&nbsp;通&nbsp;道&nbsp;速&nbsp;率&nbsp;捕&nbsp;获32&nbsp;<br>个&nbsp;独&nbsp;立&nbsp;的24&nbsp;位&nbsp;分&nbsp;辩&nbsp;率&nbsp;的&nbsp;信&nbsp;号。&nbsp;在&nbsp;此&nbsp;速&nbsp;率&nbsp;时&nbsp;输&nbsp;入&nbsp;信&nbsp;号&nbsp;带&nbsp;宽&nbsp;限&nbsp;<br>制&nbsp;到40kHz，&nbsp;这&nbsp;对&nbsp;于&nbsp;在&nbsp;音&nbsp;频&nbsp;工&nbsp;程&nbsp;和&nbsp;声&nbsp;纳&nbsp;中&nbsp;的&nbsp;声&nbsp;学&nbsp;应&nbsp;用&nbsp;是&nbsp;足&nbsp;够&nbsp;<br>的。&nbsp;<br><br>----&nbsp;ICS-110B&nbsp;板&nbsp;可&nbsp;加&nbsp;入&nbsp;一&nbsp;个&nbsp;具&nbsp;有10k&nbsp;Ω&nbsp;输&nbsp;入&nbsp;阻&nbsp;抗&nbsp;的&nbsp;任&nbsp;选&nbsp;子&nbsp;板。&nbsp;<br>但&nbsp;增&nbsp;加&nbsp;一&nbsp;个&nbsp;任&nbsp;选&nbsp;子&nbsp;板，&nbsp;其&nbsp;外&nbsp;部&nbsp;信&nbsp;号&nbsp;的&nbsp;载&nbsp;荷&nbsp;可&nbsp;限&nbsp;制&nbsp;到1M&nbsp;Ω。&nbsp;子&nbsp;<br>板&nbsp;也&nbsp;提&nbsp;供&nbsp;取&nbsp;样&nbsp;假&nbsp;频&nbsp;滤&nbsp;波。&nbsp;<br><br><br>----&nbsp;2&nbsp;极&nbsp;点Butterworth&nbsp;假&nbsp;频&nbsp;滤&nbsp;波&nbsp;器&nbsp;具&nbsp;有&nbsp;一&nbsp;个&nbsp;平&nbsp;坦&nbsp;的&nbsp;响&nbsp;应（&nbsp;有&nbsp;效&nbsp;<br>到40kHz&nbsp;带&nbsp;宽），&nbsp;截&nbsp;止&nbsp;频&nbsp;率&nbsp;为75kHz。&nbsp;<br><br>--<br>-----------------------------------------------<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;因一个词的力量<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;我重新开始生活<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;我生来就认识你<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;要把你称作<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;自由<br><br>※&nbsp;来源:·饮水思源站&nbsp;bbs.sjtu.edu.cn·[FROM:&nbsp;202.120.8.11]<br></tr></table><br><caption 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