多模多标准接收机中宽带压控振荡器的设计

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1、万方数据AbstractInordertoadapttothedevelopmentofthewirelesscommunications。developingaRFtransceivertosupportavarietyofwirelesscommunicationstandardiSahotspotintheindustryandacademiaathomeandabroad．Frequencysynthesizeristheheartofthetransceiver,whichneedstosupplyverywidefrequencyrangetocoveravariety

2、ofdifferentwirelesscommunicationstandards’workfrequencies，atthesametimealsoneedtoreachacertainphasenoiseindextosatisfytherequirementofthewirelesscommunicationstandard．VCOfVoltageControlledOscillator)iSoneofthemostimportantmodulesinfrequencysynthesizers，determiningtherangeoffrequenciesandphasen

3、oiseperformanceoftheband，therefore．thedesignofVCOiSofgreatconcerntomanyresearchersinmanyyears．ThisthesispresentstheexistingrestrictingfactorsinthedesignofwidebandLCVCObasedontheanalysisofthePhase-LockedLoop(PLL)andVCO，andthenintroducesthecommonlyusedwidebandVCOstructures，onthisbasis，thispaperd

4、iscussesthedesignprinciplesandoptimalmethodofwidebandVCOwhichisbasedontransformer,thetwokindsoftopologicalstructureanditsperformancespecificationshavebeencardedonthedetailedanalysisanddiscussion．Atthesametime，consideringthefrequencytuningrange，phasenoise，powerconsumptionandotherfactors，theon—c

5、hiptransformerismodeledandsimulatedbyusingADSMomentum．FinallybasedOBTSMC0．18mumCMOSprocess，twowidebandvoltage-controlledoscillators(VCOHandVCOL)appliedinmultimodestandardreceiveraredesigned．ThelayoutdesigniscompletedbyusingCadenceVirtuosot001．ThetwoVCOchipsoccupyanareaof10849m6169mand14209m710

6、pmrespectively．With1．8Vsupplyvoltage．thepost-simulationresultsshowthatthefrequencyrangetheVCOHcancoveris4．00～7．76GHzandthephasenoiseatIMHzoffsetislessthan一109dBc／Hz’thefrequencyrangetheVCOLCancoveris1．4m4．05GHzandthephasenoiseat1MHzoffsetislessthan—l15dBc／Hz．Thisguaranteesthecontinuouscoverage

7、ofthefrequencyrangefrom1．4～7．6GHz．andthephasenoisemeettheexpectation．TheoperatingcurrentoftwoVCOislessthan15mA．TwoVCOcoreshavebeentapedout，andthemeasureresultsshowthattheirtuningrangeis3．40-7．30GHzand1．20-4．00GHzrespectively．Butsomeadja