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时间: 2020-1-13 19:01
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OthelloOthello:ANewDirectConversionRadioChipSetEliminatesIFStagesbyDanFagueINTRODUCTIONAnalogDevicesrecentlyannouncedtherevolutionaryOthellodirect-conversionradioformobileapplications.Byeliminatingintermediate-frequency(IF)stages,thischipsetwillpermitthemobileelectronicsindustrytoreducethesizeandcostofradiosectionsandenableflexible,multistandard,multimodeoperation.Theradioconsistsoftwointegratedcircuits,theAD6523ZeroIFTransceiverandtheAD6524MultibandSynthesizer.TheAD6523containsthemainfunctionsnecessaryforbothadirectconversionreceiverandadirectVCOtransmitter,knownastheVirtual-IFtransmitter.Italsoincludesthelocal-oscillatorgenerationblockandacompleteon-chipregulatorthatsuppliespowertoallac……
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