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1、IEEEJOURNALOFSOLID-STATECIRCUITS,VOL.42,NO.2,FEBRUARY2007329ABroadbandNoise-CancelingCMOSLNAfor3.110.6-GHzUWBReceiversChih-FanLiao,StudentMember,IEEE,andShen-IuanLiu,SeniorMember,IEEEAbstract—Anultra-wideband3.110.6-GHzlow-noiseamplifierimpedancematching,flatgain
2、overawiderangeoffrequen-employingabroadbandnoise-cancelingtechniqueispresented.Bycies,andgenerallyhigherIIP3[4],[5].However,thedemandusingtheproposedcircuitanddesignmethodology,thenoisefromforhigh-qualitytransmissionlinesmakesthemlessattractivethematchingdevice
3、isgreatlysuppressedoverthedesiredUWBtolow-costapplicationsbecauseofthelargerarea.Thereisaband,whilethenoisefromotherdevicesperformingnoisecancel-lationisminimizedbythesystematicapproach.Fabricatedina9-mWCMOSDAreportedin[5]bybiasingthetransistorsin0.18-mCMOSproc
4、ess,theICprototypeachievesapowergainmoderateinversion.Thoughlowpowercanbeachieved,theof9.7dBovera3dBbandwidthof1.211.9-GHzandanoisecostisthelowerbandwidth,i.e.,7-GHzin[5].Theresistivefigureof4.55.1dBintheentireUWBband.Itconsumes20mWshuntfeedbackamplifiersprovidew
5、idebandinputmatching,re-froma1.8-Vsupplyandoccupiesanareaofonly0.59mm2.ducingtheNFbythelocalfeedback[6][8].WithsufficientlyIndexTerms—Broadband,low-noiseamplifier(LNA),noisecan-largeloopgain,theNFcanbebroughttoalowlevel,e.g.,lessceling,ultra-wideband(UWB).than3dB
6、in[6].However,duetotheinherentlylowtranscon-ductanceofCMOS,largepowerdissipationwillberequiredtoachieveahighloopgaininasinglestage[7],whilestabilityproblemswillbecausedwithmultiplestages.Recently,anewI.INTRODUCTIONtopologyhasbeenproposedforalow-powerUWBLNAina0.
7、18-mCMOSprocess[9].ItembedstheinputimpedanceofHEDEMANDforhigh-speedwirelesscommunica-anL-degeneratedLNAintoamulti-sectionreactivenetworktoTtionsystemshasgrownduringthelastfewyears.formaChebyshevbandpassfilter.WidebandinputmatchingUltra-wideband(UWB)emergesasanew
8、technologycapableandaminimumNFof4dBareachievedwith9mWpoweroftransmittingdatawithlowpowerandhighdatarate.Itconsumption.However,theNFrisesrapidlyathighfrequencies,targetsonapp
