一种16位SAR+ADC的设计

《一种16位SAR+ADC的设计》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、四哪走学硕士率业论支一种16拉．fARADC韵设计Designofa16BitSuccessiveApproximationADCMajor：Microelectronicsandsolid—stateelectronicsStudent：ZhangJiaAdvisor：GongMinWiththedevelopmentofcircuitdesigncomingintotheSOCstage，analoganddigitalmodulesmustbeintegratedtoimplementthefunctionofsystem．Butsignalsi

2、nrealworldgenerallyareanalogsignals．Therefore，analog—to—digitalconverters(ADCs)becomekeyblocksinthemixedsignalsystem．DifferenttypesofADChavetheirowncharacteristics．Owningtothepropertiesoflowpowerconsumptionandasmallarea,thesuccessiveapproximationregisterfSA鼬ADCsarecommonlyusedfo

3、rmedium-to城曲resolutionapplicationssuchasportable／batterypoweredinstruments，pendigitizersandtouchscreencontrollers．Inthiswork，a16bitSARADCwasdesigned．，Topossessthefeaturesoffast16bithi曲resolution，一10V～+10Vinputrange，100mWmaxpowerdissipation，highspeedparallelinterfaceetc，newstruct

4、ureofcouplingcapacitancesWaSadopttoworkasADC’ScoremoduleDAC，causetraditionalalgorithmandstructurecannotgetthehigh—precision．Somespecialdesignswerealsomadetorealizebothhi曲一precisionandlowpowerconsumption．ChargeredistributiontechniqueWaSemployedanda2．5Vbandgapreference，accurateclo

5、ckwereintegratedoilchip．Comparedwithmanytypesofreference，atlastbandgapreferencewasused，consideringtoitsbestTCandPSRR．AbufferWaSarrangedtofollowthereferencetoincreasetheloadcapacityandinsulatethenoisefromthedigitalcircuits．Toensuretheclockwiththeaccuratefrequencyof5MHzanddutyrati

6、oof1：1，selfdetectorwasaddedtotheclockcircuit．ThroughthestateIII码7)zl走学硬士串业论文一种164．P-SARADC的设计ofthetestpad．itcarlmakeweknowhowtocalibratetheresistorandcapacitorsafterfabrication．AsanotherkeymoduleofaADC，inthisworkfulldifferentialstmcnlrecomparatorwasintroduced．Itwascombinedofprea

7、mplifier,amplifierandlatchtoharmonizetheconflictofgainandbandwidth．Alsothedesignofoutputoffsetstoragesolvedthecomparator’Sinputoffsetproblem．Inordertoreducethecapacitorerrors，especiallytheunknownrandomerrorsthatcamefromthefabrication，theself-calibrationtechniquewasusedheretosolv

8、etheproblem．Inthis16一bitADCdesign，thecapacitora