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1、ISSCC2001/SESSION13/WirelessLAN/13.213.2AFully-IntegratedCMOSRFICforBluetoothanychangesinthefiltercharacteristicsduetoprocessortem-peraturevariations.TheIFsignalisamplifiedbyalimitingApplicationsamplifierthatprovides~40dBgain.Thequadraturetypedemod-ulatorco
2、nsistsofaGilbert-cell-basedmultiplierandaBesselArunaAjjikuttira,ChesterLeung,Ee-SzeKhoo,MarkChoke,RajinderSingh,low-passfilterproviding375nsdelay.ThedemodulatedsignalTian-HweeTeo1,Ban-ChuanCheong1,Jin-HuiSee1,Hwa-SengYap1,Poh-passesthroughalow-passfilterand
3、reachesthedynamicdataBoonLeong1,Choon-TiongLaw1,MasaakiItoh1,AkiraYoshida2,YoshikazuslicerthatprovidesCMOSlogicleveloutputforthebasebandIC.Yoshida2,AtushiTamura2andHiroshiNakamura2.Thefrequencysynthesizerisbasedonconventionalinteger-NInstituteofMicroelectro
4、nics(IME),Singapore;PLLarchitecturewithopen-loopmodulation.Thephase-fre-1OkiTechnoCenter,Singapore(OTCS);quencydetector(PFD)comparisonfrequencyis1MHz.Thecoun-2OkiElectricIndustry,Hachioji,Tokyo,Japan.tersareprogrammedviaa3-wirebusinterface.TheVCOoutputisbuf
5、feredandpassedtoa÷32/÷33prescalerrealizedwithacur-Ahigh-levelofintegrationcoupledwiththechoiceofamain-rent-modelogic(CML)circuit.Theloopfilterisexternal.Thestreamtechnology,suchasCMOS,iscriticaltoachievehigh-vol-VCOcircuitdiagramisshowninFigure13.2.4.Theind
6、uctorhasumelow-costwirelesscommunicationsolutions[1-3].Thissin-aquality-factor(Q)~6.Themeasuredsynthesizerphasenoiseisgle-chiphighlyintegratedRFtransceiverforBluetoothinthe2.4-104dBc/Hzat550kHzoffsetand-116dBc/Hzat2MHzoffset.to2.5GHzfrequencybandisimplement
7、edinastandard0.35µmThereferencespursare53dBbelowcarrier.PLLsettlingtimeisCMOSprocesswithmetal-insulator-metal(MIM)capacitor140µs.option,atechnologychoicedeterminedbycostandRFperfor-mance.Itfeaturesfully-integratedtransmit/receive(T/R)switch,Thepoweramplifie
8、r(PA)schematicisshowninFigure13.2.5.Itfrequencysynthesizer,transmitdatafilter,poweramplifier,andisatwo-stageclass-ABcircuitwithinternalfeedbacktoensurecompletelow-IFreceiver.Thisreducesexternalcomponen
