a dc-9.5ghz noise-canceling distributed lna in 65nm cmos

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1、RMO3B-2ADC-9.5GHzNoise-CancelingDistributedLNAin65nmCMOSJianxunZhu,HarishKrishnaswamy,PeterR.KingetDept.ofElectricalEngineering,ColumbiaUniversity,NewYork,NY10027,USAAbstractAlownoiseamplifierispresentedthatuniquelyofaclassicalDAisreplacedbyacommongateampli

2、fierachieveswide-bandinputmatchingandgoodlow-frequencywitha50Ωinputimpedance,anditsnoiseiscanceledatnoiseperformanceatthesametime.Itstopologyisahybridthedifferentialoutput.ofdistributedamplifierandacommon-sourcecommon-gateTherestofthepaperisorganizedasfollow

3、s:sectionIInoise-cancelingamplifier.Theproof-of-principleprototypein65nmCMOSoperatesfromDCupto9.5GHzwithmorethanintroducestheNCDAdesignandshowshowitevolves12dBgain,achievesaminimumnoisefigureof2.8dB,P1dBoffromtheNC-LNAandDAtopologies.Simulationand-7dBm,IIP3o

4、f+4dBm,consumes18mWfroma1.4VpowermeasurementresultsaredemonstratedinsectionIII.Thesupplyandoccupiesatotalactiveareaof0.4mm2.paperconcludeswithacomparisonoftheoverallperfor-IndexTermsCMOSintegratedcircuits,Distributedam-manceoftheNCDAtothestateofartinsectio

5、nIV.plifier(DA),Low-power,Lownoise,Low-noiseamplifiers(LNAs),Noise-cancelingLNA,Noisecancellation,RF,Wide-II.NOISECANCELINGDISTRIBUTEDLNAbandLNA,Widebandmatching.A.LimitationsofCS-CGNC-LNAandDAI.INTRODUCTIONAconventionalCS-CGnoisecancelingLNAusuallySoftware-

6、definedradio(SDR)andcognitiveradio(CR)consistsofaCSstageandaCGstage,asillustratedreceiversneedtosupportmultiplestandardsandwideinFig.1(a).TheCGstageenableswide-bandinputbandwidthsandthusrequirehighqualitylow-noiseampli-impedancematching,andthethermalnoiseas

7、sociatedwithfiers(LNA)thatspanawidefrequencyrange.ThiscouldM2issensedbyM1andappearsascommonmodeatthebeachievedbyusingadedicatedLNAforeachfrequencydifferentialoutputvoltage[1].Theexcessthermalnoiseband.However,awide-bandLNAismoreeconomicinisthusmainlycontrib

8、utedbyM1andloadresistors.Bytermsofchippinout,areaandpower,andpotentiallyhasputtingmoreCSbranchesinparallel,noisefigureofthehigherflexibilitycomparedtoamulti-LNAsolution.NC-LNAcanbeimproved.Common-sourcecommon-g