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1、ASTATEOFTHEARTONADCMODELINGP.Arpaia,P.Daponte,S.RapuanoDipartimentodiIngegneria,FacoltàdiIngegneria,UniversitàdelSannio,PalazzoDell’AquilaBoscoLucarelli,PiazzaRoma,82100,Benevento,Italy.Ph.++390824305817,Fax++390824305840,E-mail{arpaia,daponte,rapuano}@unisannio.it.Abstract-Thest
2、ateoftheartoftheresearchon2.QUANTIZATIONMODELSmodellingofanalog-to-digitalconverter-basedmeasuringdevicesissurveyed.MaintopicsofInlasttenyears,researchonADCmodellingmodellingarereviewedaccordingtothefieldsofrelatedtothequantizationcanbeclassifiedonthebasisprevailingscientificinte
3、restinmetrologicalresearchoftheeffectsofquantizationmodelson(i)theADCsuchasquantizationmodels,errormodels,anderrors,(ii)thedithering,and(iii)thetestingstrategy.correction-aimedmodels.Inthesefields,recentInthelastdecade,theeffectsofquantizationmodelsdevelopmentsareanalysedwiththea
4、imoffocusingonADCerrorshavebeeninvestigatedwiththemainboththecontemporarysituationandtheimminentaimofassessingtheconditionsforthemodelvaliditytrends.[1]-[3].Conversely,thecurrentresearchtrendisaimedatovercomingthelimitationsduetotheassumptionofuniformdistributionofthequantization
5、noise,andat1.INTRODUCTIONinvestigatingthequantizationerrorfornonidealquantizers[4]-[6].Inparticular,forauniform[8],Inthewiderandwiderdevelopmentofanalog-to-nonuniform[9],nonmonotonicandhystereticquantizerdigitalconversionsystems,apre-eminentrolehasbeen[10],theprobabilitydensityfu
6、nction(pdf)andtheplayedbymodellingtechniques.varianceofthequantizationerrorwasderived.Modellingofanalog-to-digitalconverter(ADC)Theeffectsofquantizationmodelsonditheringcomponents,aswellasofdigitalmeasuringsystemshavebeeninvestigatedbyreferringtothewellknownbasedonADCs,allowsthed
7、evicebehaviourtobeideaofditheringwhichconsistsof"whitening"thepredictedwithafewofpreventiveexperiments.Forthisautospectraldensityofthequantizationnoisebyaddingreason,inlastyearsagreatdealofscientificinterestasuitablesignal,andthenreducingthisnoisebydigitalhasbeendirectedtoADCmode
8、llingalsoforsignalprocessing[11]-[14].Th
