A Low-Power, 3–5-GHz CMOS UWB LNA Using Transformer Matching Technique

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1、3-3IEEEAsianSolid-StateCircuitsConferenceNovember12-14,2007/Jeju,KoreaALow-Power,3–5-GHzCMOSUWBLNAUsingTransformerMatchingTechnique121DongHunShin,JaejinPark,andC.PatrickYue1Dept.ofElectrical&ComputerEngineering,UniversityofCalifornia,SantaBarbara,CA931062SamsungEle

2、ctronics,Giheung,Gyeonggi-do,KoreaAbstract—Thispaperpresentsthedesignofa3−5-GHzTheinputmatchofacascodestagewithdegenerationCMOSultra-wideband(UWB)low-noiseamplifier(LNA)inductorisinherentlynarrowbandduetotheseriesRLCutilizinganon-chiptransformertoachievelow-powerre

3、sonantcircuitformedbyLsandCgs1+Cd[5].Inthisoperationandtorealizeacompactinputmatchingnetwork.work,atransformerwithashuntcapacitor(Cp)isutilizedDetailedanalysesoftheinputmatch,voltagegain,andnoisetoabsorbthisseriesRLCcircuitintoawidebandfigureoftheLNAareprovided.Imp

4、lementedin0.13-µmmatchingnetwork.CMOS,theLNAachievesamaximumpowergainof16.2VDDdB,aninputreturnlossofgreaterthan11.0dB,andaminimumnoisefigureof2.8dBforthe3−5-GHzUWBRloadwhileconsumingonly6.7mWfroma1.2-Vsupply.TheLload2activeareaofthefabricatedCMOSUWBLNAis0.32mm.Vout

5、M3Indexterms—Ultra-wideband,low-noiseamplifier,VBIASM2Vout'transformer,broadbandmatching,CMOS,RFIC.VCcinI.IkM1NTRODUCTIONVgs1RsAcriticalcomponentinanultra-wideband(UWB)CpL1L2VsCLsystemisawidebandlow-noiseamplifier(LNA).ItdsZinZgneedstoprovidelownoisefigure,stablega

6、in,andgoodinputmatchingovertheentirebandwidthwithlowpowerconsumption.Several3−5-GHzCMOSUWBLNAFig.1.SimplifiedschematicoftheproposedUWBLNA.topologiesutilizingvariousinputmatchingnetworkshavebeenreportedrecentlysuchasLCband-passfilterA.InputMatchingNetwork(BPF)[1],re

7、sistiveshuntfeedback[2],andmillereffectFigure2showsthesimplifiedequivalentcircuitforthe[3].TheBPFmatchingnetwork-basedtopologyachievesproposedtransformer-basedinputmatchingnetwork.widebandcharacteristicswithlowpowerconsumption.II12However,ittendstooccupylargedieare

8、aduetotheneedkofmultipleon-chipLCcomponents.TheresistiveshuntfeedbackLNAalsohaswidebandcharacteristics,butitCpL1L2Zttendstodegradenoiseperformanc