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华中科技大学硕士学位论文125kHz射频识别芯片调制电路的设计姓名:段毅君申请学位级别:硕士专业:软件工程指导教师:应建华20080527IRFID:RadioFrequencyIdentificationRFIDRFIDASKHHXFABCMOS0.6µmRFIDASKHIIAbstractRFID(RadioFrequencyIdentification)technologyisatechnologythatincorporatestheusingofradiofrequencysignalandelectromagneticcouplingtouniquelyidentifyanobject.Also,RFIDtechnologyusestheelectromagneticcouplingtoaccomplishdatatransmissionbetweenthebasestationandtags.TheadvantagesofRFIDtechnologyarenotrequiringthetranspondertobeinline-of-sight,longerdistanceidentificationthanopticalsystem,readbaleandwritabletagswhichcancontainlargeamountsofdata,difficulttobecounterfeitedandhigherintelligenceetc,whichmakeittobewidespreadusedinsociety.Inthispaper,thebasictheory,fundamentaloperatingprinciplesandrelatedstandsofRFIDsystemareintroduced.Also,thekeytechnologiesandsolutionsofmodulationcircuitsinRFIDreaderarediscussed.Indetail,theoverallframeworkofmodulationcircuits,thebasictheoryofASKmodulation,characteristicsofresonantingantenna,etcareintroducedfirst,andalsothelimitationroutineofthesystemtothecircuitblocksarededuced;Andthen,thebasiccircuitsofmodulationcircuits,includingBandgapReference,CP-PhaseLockedLoopandH-BridgeOutputareintroduced,whicharedesignedexactlyfollowedthesystemrequirements.Thedetailsfocusedonareasfollows:thesignalflowdeductionofBandgap’sPowerSupplyRejectionRatio(PSRR),thedetectionofBandgap’sdegeneratebiaspointsandinitialaccuracy,thedesignofCP-PLLsystemmodel,thephasenoiseofVCOandtheH-BridgeOutput’sElectroMagneticInterference(EMI)phenomenon.Thesimulationresultsshowthatcircuitsdesignachievesthesystemrequirments.Finally,themodulationcircuits’simulationmodelsofRFIDsystemarebroughtforth,andalsosimulationresultsandlayoutareafforded.ThedesignisimplementedwithXFABCMOS0.6µmprocessandhasalreadysucceededinsiliconverification.ThesimulationresultsverifythatthedesignofthecircuitsfullymeetstherequirementsofRFIDsystem.Keywords:RadioFrequencyIdentification(RFID),ASKModulation,BandgapReference,PhaseNoise,H-BridgePowerOutput,ElectroMagneticInterference(EMI)______111.1(RFID)(RFID)[1][3]RFIDRFIDRFID[2][4](1)RFIDRFID(2)RFIDRFID(3)RFID(4)RFID(5)2(6)50Bytes23000RFIDMbytes(7)RFID(8)RFID21RFIDRFID1.2RFID()1-131-1RFIDRFID()[5][6]RFID135kHz13.56MHzUHF860MHz960MHz2.4GHz[3][4]RFIDRFID13.56MHzRFID1.5m[7][8][9][1](1)(2)125kHz225kHz13.56MHz1m4125kHz1.31922RFID1948·RFID2070RFIDRFIDRFID2080RFID2090RFIDRFIDRFIDRFID(1)RFID(2)RFID100(3)RFID(4)EPCUIDRFID[10]RFID(1)RFID(2)RFID(3)(4)RFIDRFIDRFIDRFID2004220044EPCGlobalUIDEPCGlobal5ChinaUID2006(RFID)RFID1.4(1)(RFID)HXFABCMOS0.6µm(2)D(CLASSD)H2.1W/80%XFABCMOS0.6µm(3)PipelineADCXFABCMOS0.35µm(4)PFMDC-DCXFAB0.8µmBiCMOS(5)50RFID(6)DRCLVSEXTRACTIEEE61.5RFIDRFIDRFIDASK100%RFIDPSRRPSRR(Driver)H(EMI)1.6(1)PSRRPSRR(2)(3)(EMI)72RFID2.1RFID125kHz100kHz150kHzRFID[1][12]EN300330ISO11784ISO11785ISO142232-1125kHzRFID2-1125kHzRFIDVDDVSSDVDDDVSSAGNDMODDEMOD_INDEMOD_OUTANT1ANT2SHDRDY/CLK125kHzMODASK100%DEMOD_IN8DEMOD_OUT(1)(2)100kHz150kHzRFID(3)ASK100%2kbits/sASK100%2.22-1H(125kHz)ASK100%MOD2.2.12-2[3]LC2-2LCRANTLCRANT950%50%2.3.110cmRANT[1]120ALHµ=(2-1)13RESCnF=(2-2)01127.42ARESfkHzLCπ==(2-3)LACRES4AQ=(2-4)RANT0223.5AANTAfLRQπ==Ω(2-5)Ron0.5onR=Ω(2-6)4259.82ddssANTANTonVVImARRπ−==+(2-7)183.72ANTRMSIImA==(2-8)10050.9ANTANTppRESIVVfCπ==(2-9)2.2.2ASK[3]Cfλ=(2-10)λmC3×108m/sfHz20Hz~20kHz15×105m15×108m(AM)(FM)(PM)ASK(Amplitudeshiftkeying)2-3[1]112-3ASK[1]m00101ˆˆˆˆˆˆˆˆˆmmmmuuuuumuuuu∆−−===+(2-11)01ˆˆˆ2muuu+=(2-12)ASK100%1ˆu=02-42-4ASK100%[1]2.2.3RFID[1][11]2-5122-5STSTLTLTLAMLTLTMLA2-62-6LTZTM2-72-7Vsense138senseVmV=(2-13)2.3LC[3]10ARESjLjCωω+=(2-14)f0LCf0LC0LC∞LC2-82-8f02.3.1(1)50%14(2)[13]VCO2.05ns[13]2-92-9f0[14]τ12-102-10/2/2/2/2()()()2sin()12()jtjtjtjjXxtedttrectedtedteejωτωωτωτωτωτωτωω∞−−∞∞−−−∞−−=⋅=⋅==−−=∫∫∫(2-15)0()Xωτ≈(2-16)CadenceSpectre152-112-11Vsense8mV2.05ns2.3.2(1)IANT=259.8mA(2)H(3)(Shoot-Through)(4)EMI(Driver)2.3.3(1)VCO(2)VCO(PSRR)1633.1,[15]-[17]RFID[15](1)(2)(3)(4)(5)RFID(PSRR)RFID173.23-170(Widlar)(Bandgap)[18][19](0K)1.205VVG0VBE∆VBE,3-1VBE[20][21]00000()/[()()]ln(/)ln[()/()]BEBETTGGCCVVTTTVTVTVTTVITITη=+−−+(3-1)VGηT0ICαVref()()BErefVTVTKT=+0000()(/)[()()]()ln(/)BETGGVTTTVTVTVTTKTηα=+−−−+(3-2)Vref(3-2)TlnT(4-21)023123...nnBEVaaTaTaTaT=+++++(3-3)a0a1…anηηη3.23.611ppm18VBE3-23-2Q1-Q6CMOSPNPQ1Q25BJTRpolyR1=500kΩCpolyC1100nFAR3PTAT332ln()/2ln25/TTPTATImnVRVR==⋅×⋅×(3-4)m=n=5235,6(1)22ln()outrefTBEQRRVVVmnV×+==+⋅×(3-5)(3-5)230030035,6022(ln25(1))TKTKBEQRVRVrefkTTq==∂=∂=⋅+⋅×+∂∂(3-6),5,61.85/BEQmVKVT≈−°∂∂0.087/TmVKVT≈°∂∂235.8RR≈(3-7)19R2=47.7kΩR3=8.5kΩ2.5outrefVVV==(3-8)3-33-332.3ppm3.3PSRR[21][22][23]PSRRPSRR203.3.13-43-4[21]a(s)Aβh(s)AVohβ(s)0(0)(0)(0)(0)1(0)1(0)(0)ofddhhhhVVββαβαββα→⋅+≈+⋅+⋅=(3-9)hβ(0)0Aα(0)h(0)A3.3.2APSRR3-5213-5APSRR3-5AA1A2VddVddVo1VNVn=k·VddVo1A1A2(1)A1VbA1bVddGm,VddaM1Ra11112221112amooommmRgrrrggg=⋅⋅++=⋅+(3-10)M1ib1131/(1/)/(2)bddamddoiVRgVr=+≈⋅(3-11)M4bGm,Vdd,121amVddddoiGVr⋅==(3-12)VnGm,VNVnM9iM9=gm9·VnM1M23-6223-6r1311111/0()mmmbogrggr=≈+(3-13)bib2Gm,VN2211292211mmbmmbbMmmbmmbggggiigggg+−−=⋅+++(3-14)2121,92111()2()NmmmbmbmVmmmmmbggggGkggggg
本文标题:125kHz射频识别芯片调制电路的设计
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