共源共栅两级运放中两种补偿方法的比较

26720097MICROELECTRONICS&COMPUTERVol.26No.7July2009:2008-10-20:(10876029)连全文,冯全源(,610031):给出了两种应用于两级CMOS运算放大器的密勒补偿技术的比较,用共源共栅密勒补偿技术设计出的CMOS运放与直接密勒补偿相比,具有更大的单位增益带宽更大的摆率和更小的信号建立时间等优点,还可以在达到相同补偿效果的情况下极大地减小版图尺寸.通过电路级小信号等效电路的分析和仿真,对两种补偿技术进行比较,结果验证了共源共栅密勒补偿技术相对于直接密勒补偿技术的优越性.:Miller补偿;折叠共源共栅;运算放大器;CMOS:TN432;TN722:A:1000-7180(2009)07-0191-03TheComparisonofTwoCompensationMethodsinCascodedTwoStageCMOSOperationalAmplifierLIANQuanwen,FENGQuanyuan(InstituteofMicroelectronics,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:ThedifferencesbetweentwomethodsofMillercompensationinCMOSoperationalamplifier(opamp)withthestructureoffoldedcascodearediscussedhere.ComparedwithMillercompensationopamp,thecascodedMillercompensationamplifiercanobtaingreatergainbandwidthproduct(GB)andslewrate(SR),thesettingtimecanalsobemadeshorter,theareaofthewholecircuitcanbedecreasedbyreducingthevalueofthecapacitorforcompensationwithoutdepressingperformance.TheadvantagesofcascodedMillercompensationtechnologyoverMillercompensationarerepresentedthroughtheanalysisandsimulationoftheequivalentcircuits.Keywords:Millercompensation;foldcascade;operationalamplifier;CMOS1,.,,[13].,,,,,,.,.,CMOS[4].Cc(RHP),,.RHP.,,,018mCMOS,.21(a),,,(polesplitting),,1(b).1(2).,.,PMOS;NMOS,PMOS;CL;Cc,.:,,,,.:CcXY,;CcXZ,[5].33.,MI2PMOS,MN3cascode,MI2IB2,MNONMOS,Req,RL,CcCL,CinC1C2.232,==0,[6],4.419220094,(XMN3Y):Vout(S)Vin(S)=-ReqRLgm1(SCc-gmo)ReqRLCCCLS2+(ReqCC+RL(CC+CL)+ReqgmoRLCC)S+1:|p1||p2|,,:p11gmoRLReqCC;,:p2gmoCL;,:zgmoCC.,(XMN3Y):Vout(S)Vin(S)=-RLgm3gm1(SCc-gmogm3Req)RLCCCLgm3S2+(gmoReqRLCC+RL(CL+CC)+CCgm3)S+1,:Av(0)=Av(0)=gm1ReqgmoRL;;,:p2=gm3ReqgmoCL=gm3Reqp2,:z=gm3ReqgmoCC=gm3Reqz,,p2z.,,,,.RHP,,.40.18m(3V)CMOS,BSIM3V3(V3.2)Spice,HspiceZ-2007.03,VDD=3V.5.928dB,63MHz,595;948dB,,741MHz,849.,,.5PSRRCMRR6.PSRR89.64dB,CMRR112.92dB;,.6PSRRCMRR,:5.0V/s5.2V/s;1%(CL=10pF,Vstep=3V):763.3ns645.4ns.5-,,0.18mCMOS.,,,.,(下转第197页)1937,:Germany,1998:214-219.[2]BogdanKwolek.CamShift-basedtrackinginjointcolor-spatialspaces[J].ComputerAnalysisofImagesandPatterns,2005(3691):693-700.[3]ZhaowenWang,XiaoKangYang,YiXu.CamShiftguidedparticlefilterforvisualtracking[C]//SignalProcessingSystems.China:Shanghai:IEEEWorkshop,2007:301-306.[4]FukanagaK,HostetlerLD.Theestimationofthegradientofadensityfunction,withapplicationsinpatternrecognition[J].IEEETransInformationTheory,1975,21(1):32-40.[5]ChengY.Meanshift,modeseeking,andclustering[J].IEEETransactiononpatternanalysisandmachineintelligence,1995,17(8):790-799.[6]JohnGAllen,RichardYD.Objecttrackingusingcamshiftalgorithmandmultiplequantizedfeature!spaces[C]//Proc.2003Pan-SydneyAreaWorkshoponVisualInformationProcessing.Australia,Sydney,2004:3-7.[7],.[M].:,2003:28.[8]ComaniciuD,RameshV,MeerP.Kernel-basedobjecttracking[J].PatternAnalysisandMachineIntelligence,IEEETransactionson,2003,25(5):564-577.:,(1979-),..,(1962-),,..,(1960-),,..,(1973-),..(上接第193页),,,,,.:[1],,.CMOS[J].,2007,24(8):102-105.[2]RazaviB.DesignofanalogCMOSintegratedcircuits[M].NewYork:McGrawHill,2001:291-336.[3],.Rail-to-RailCMOS[J].,2008,25(3):166-171.[4],,,.VLSIRail-to-Rail[J].,2002,22(1):107-113.[5]RonH,JohnPT,RuudGH,etal.Acompactpower-efficient3VCMOSRail-to-RailinputoutputoperationalamplifierforVLSIcelllibraries[J].IEEEJSolStaCirc,1994(29):1505-1513.[6]AllenPE,HouglasDR.CMOS[M].2.,.:,2005:604-612.:,(1984-),..,(1963-),,.RFID.1977,:CamShift