一种复数滤波器及其自动调谐系统的设计

:2006203213;:2006206212:(60475018,60236020);(D0305003040111)4MHz1,1,1,TanSeeteck2(1.,100084;2.O2Micro,554914):,,,0.18mCMOS,4MHz,2MHz,0dB,53dB,3%,7.5mW:;RC;;:TN713+.5:A:100423365(2006)0620820205Designofa4MHzComplexFilterwithAutomaticTuningSystemDUDing2kun1,LIYong2ming1,WANGZhi2hua1,TANSeeteck2(1.InstituteofMicroelectronics,TsinghuaUniversity,Beijing100084,P.R.China;2.O2MciroPte.Ltd,Singapore554914)Abstract:Acomplexfiltersynthesizedfromtheleapfroglowpassprototypeisproposed.Thefilterhaslowsensitivityand,therefore,animprovedstability.Thetuningsystem,whichiseasytodesignandwellcontrolled,canbeturnedoffonthecompletionoftuning,whichreducespowerconsumptionandinterferencewiththefilter.Implementedin0.18mCMOSprocess,thefilteriscenteredat4MHzwithabandwidthof2MHzandavoltagegainofabout0dB.Theimagerejectionratioofthefilterisupto53dBanditstuningaccuracyisabout3%.Thedeviceconsumes7.5mWofpower.Keywords:Complexfilter;Active2RCfilter;Operationalamplifier;AutomatictuningsystemEEACC:1270D1,,,[1,2],(polyphasefil2ter)[3],,,,[4],,,11GPS,:4MHz,2MHz,0dB(0.5dB),40dB,10%,9mW,RC366200612MicroelectronicsVol136,6Dec12006,[5],RC[4],,,,,RC,,,RCRC,CMOS,,,RCRC,MOS,MOS,,RC[6]MOS,;,,[7,8],,,,;,,,,,,,,,n,1/2n,10%,522.12(leapfrog),IQ,2MHz,,,,2iCi,:Ri=1/cCi(1),c(24MHz)[8],,,2.2,33RC()6:4MHz821(),:Hi(s)=-R2//(1/sC0)R1=-Ac(s)(2),Ao(s),:Hn(s)=-R2//(1/sC0)R1+R1+R2//(1/sC0)Ao(s)=-Ac(s)1+1+Ac(s)Ao(s)(3),,Hn(s)Hi(s),,:Ao(s)(Ac(s)-1)[1+Ac(s)](4)L,,,,:GBW(Ac(jL)-1)[1+Ac(jL)]L(5),,0.5dB,6%,2(5),1003MHz5MHz,,500MHzHSPICE,,,420MHz,RC,,,10k,1.5pF[5],4,,,;,,4,1.2mW,480MHz,75,60dB(),2.3,5,4MHz,2MHz,0dB,-4MHz53dB,7.5mW533.1822:4MHz2006RC,RC,RC,RC,,,RC66,,[5],Vref:IC=Vref/Rref(6),,,Tint,:VO=VrefRrefCbankTint(7)Vref,10,,100001,011111(1),51,5,,,,0,5,,,,,,,,3.277(a),7(b)7,,,;,,1(0111110000),,3%5,,25,32,,,,MOS,6:4MHz823,;,,,,4CMOSRC,;,,,,:[1]BehbahaniF,FirouzkouhiH,ChokkalingamR,etal.Afullyintegratedlow2IFCMOSGPSradiowithon2chipanalogimagerejection[J].IEEEJSolStaCirc,2002,37(12):172121727.[2]KoJ,KimJ,ChoS,etal.A192mW2.62mm2L1/L2dual2bandCMOSGPSreceiver[J].IEEEJSolStaCirc,2005,40(7):141421425.[3]BehbahaniF,KishigamiY,LeeteJ,etal.CMOSmixersandpolyphasefiltersforlargeimagerejection[J].IEEEJSolStaCirc,2001,36(6):8732887.[4]CrolsJ,SteyaertM.Ananalogintegratedpolyphasefilterforahighperformancelow2IFreceiver[A].SympVLSICirc[C].Kyoto,Japan.1995.87288.[5]DarabiA,AbidiAA.A4.52mW9002MHzCMOSre2ceiverforwirelesspaging[J].IEEEJSolStaCirc,2000,35(8):108521096.[6]BanuM,TsividisY.Anellipticcontinuous2timeCMOSfilterwithon2chipautomatictuning[J].IEEEJSolStaCirc,1985,20(6):111421121.[7]BoXia,YanS,Sanchez2SinencioE.AnRCtimecon2stantauto2tuningstructureforhighlinearitycontinu2ous2timemodulatorsandactivefilters[J].IEEETransCircSystI,2004,51(11):217922188.[8]DurhamAM,Redman2WhiteW.Integratedcontinu2ous2timebalancedfiltersfor162bDSPinterfaces[J].IEEEJSolStaCirc,1993,28(7):8352839.:(1982-),(),,,2004,(819)5,0.18m,4W4m,,,:[1]FinkenzellerK.(RFID)[M].().:,2001.87293.[2]KocerF,WalshPM,FlynnMP.Wireless,remotelypoweredtelemetryin0.25mCMOS[A].RFICSympDigPapers[C].Hawaii,USA.2004.3392342.[3]EuropeanCommission.PassiveLongDistanceMulti2pleAccessUHFRFIDSystem[EB/OL].[4]DicksonJ.On2chiphigh2voltagegenerationinNMOSintegratedcircuitsusinganimprovedvoltagemultipliertechnique[J].IEEEJSolStaCirc,1976,11(6):3742378.[5]NCITS25621999[S].RadioFrequencyIdentificationInternationalCommitteeforInformationTechnologyStandards,1999.[6]KarthausU,FischerM.FullyintegratedpassiveUHFRFIDtransponderICwith16.72WminimumRFin2putpower[J].IEEEJSolStaCirc,2003,38(10):160221608.:(1981-),(),,,20037,915MHz824:4MHz2006