标签: digitization

Thisapplicationnotedetailscircuittechniqueswhichdirectlydigitizethelowleveloutputsofavarietyoftransducers.TheapproachesdescribedareuniqueinthattheydonotutilizeanyDCgainstage.ThetransduceroutputsreceivenoDCsignalconditioning;A/Dconversionisdirectlyperformedatlowlevel.Thecircuitsproduceaserialdataoutputwhichmaybetransmittedoverasinglewirewiththecharacteristicnoiseimmunityofdigitalsystems.eliminatingthetraditionalDCgainstage,thesecircuitsfurnishadirect,economicalwaytodigitizelowleveltransduceroutputswithoutsacrificingperformance.ApplicationNote7February1985SomeTechniquesforDirectDigitizationofTransducerOutputsJimWilliamsAlmostalltransducersproducelowlevelsignals.Normally,meaninga10-bitA/DconvertermusthaveanLSBincre-highaccuracysignalconditioningampliersareusedtomentofonly30μV.Performinga10-bitconversiononaboosttheseoutputstolevelswhichcaneasilydrivecables,typeKthermocouplemonitoringa0°Cto60°Cenvironmentadditionalcircuitry,ordataconverters.Thispracticeraisesprovesevenmorestringent.ThetypeKthermocouplethesignalprocessingrangewell……

RFandIFDigitizationinRadioReceiversNTIAReport96-328RFandIFDigitizationinRadioReceivers:Theory,Concepts,andExamplesJ.A.WepmanJ.R.HoffmanU.S.DEPARTMENTOFCOMMERCERonaldH.Brown,SecretaryLarryIrving,AssistantSecretaryforCommunicationsandInformationMarch1996ProductDisclaimerCertaincommercialequipment,components,instruments,andmaterialsareidentifiedinthispapertoprovidesomeexamplesofcurrenttechnology.InnocasedoessuchidentificationimplyrecommendationorendorsementbytheNationalTelecommunicationsandInformationAdministration,nordoesitimplythatthematerialorequipmentidentifiedisnecessarilythebestavailableforthepurpose.Furthermore,examplesoftechnologyidentifiedinthispaperarenotintendedtobeall-inclusive;theyrepresentonlyasampli……