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ID:6800879
大小:73.00 KB
页数:20页
时间:2018-01-26
《电子通信类专业毕业设计(论文)外文翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、TheapplicationofmicrocontrollerinclosedcaptionsystemAbstractThispaperdescribesournewlydesignedmicrocontrollersforClosedCaptionsystemapplication.ThesemicrocontrollersintegratetheClosedCaptiondecodingfunctionandotherfunctionsrequiredforTVsetcontrol.1.IntroductionMicrocontrollersthatutilize
2、theClosedCaptionfunctionhavebeendeveloped.TheClosedCaptiondecodingfunctionmustbeprovidedforallTVsetssoldintheU.S.fronJuly1993.Thesebasicsystemdevelopmentguidelineswereasfollows:(1)Thesystemmustprovidestabilizedreception.(2)Thesystemshouldofferlow-costoperation.Thekeywordforthisdevelopmen
3、twasfull-function.InregulationsestablishedonApril12,1991,theFCCspecifiedthetextmodeasbeingoptional,thusreflectingthatcommitteeonlow-costsystems.WithourgoalofsupplyingClosedCaptionhardwareasanewinformationmedium,wedecidedtodevelopasystemsatisfyingthespecificationsforalloptions.Lastyearwei
4、ntroducedtheadd-ontypeofClosedCaptionDecoderLSIkitdesignedforeasyinstallationintoexistingTVsets.TheClosedCaptiondecodingfunctionisimplementedefficientlybymicrocontrollersdescribedinthispaper.Thehigh-performanceOn-ScreenDisplayfunctionforClosedCaptionapplicationcanbeusedforeasyTVsetoperat
5、ion.第20页共20页Thisnewmicrocontrollerisalowcost,highaccuracyinstrumentationthatrequiresonlyoneexternalresistortosetgainsof1to10,000.Furthermore,Thisnewmicrocontrollerfeatures32-leadSOICandDIPpackagingthatissmallerthandiscretedesignsandofferslowerpower,makingitagoodfitforclosedcaptionsystema
6、ndportable(orremote)applications.Thisnewmicrocontroller,withitshighaccuracyof40ppmmaximumnonlinearity,lowoffsetvoltageof50µVmax,andoffsetdriftof0.6µV/°Cmax,isidealforuseinprecisiondataacquisitionsystems’transducerinterfaces.Furthermore,thelownoise,lowinputbiascurrent,andlowpowerofThisnew
7、microcontrollermakeitwellsuitedformedicalapplications,suchasECGandnoninvasivebloodpressuremonitors.Thelowinputbiascurrentof1.0nAmaxismadepossiblewiththeuseofprocessingintheinputstage.Thisnewmicrocontrollerworkswellasapreamplifierduetoitslowinputvoltagenoiseof9nV/Hzat1kHz,
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