一种新型的多道高精度电荷-电压幅度转换电路的设计

284Vol.28No.420087NuclearElectronics&DetectionTechnologyJul.2008吴鸣1,2,苏弘1,马晓莉1,千奕1,2,董成富1(1,730000;2,100049):,,,,,(0600pC),,,ASIC:QAC,,,,,ASIC:TN78,O433:A:02580934(2008)04069005:20080229:(10675153):(1981-),,,,(CSR)(CSRm)(CSRe),,RIBLL,1GeV,,PMT,,,,,,Q(),,,1,,,,,,,,,,Q,11,QAC,,,,,,CPLD2216901QAC,i(t),i(t),,Q,:i(t)=lim0Q[3](1)Q,E,,,MAXIMMAX477,-3dB300M,tr=035F3dBtr=1ns,2ns,,Q22QAC()[4,5],-,2,QAC;-AQ1Q4Q2Q3iin,iin=Iin,A2QAC-Q1A,,,A1,A1IinBJTR,BJTR,[6]Q1ic10=ie10=A1,,Q1ie1=A1+Iin,ie1=ic1,ic1=ic1!=ic10+Iinic1=ic2Q3Q2R2R3,,R2R3,,ic4=ic3=Nic2(N)ic4=N(ic10+Iin)ic10(),ic4=NIin,--,,[7]23,691Q,QGATE,HOLDQCLEAR,,MAXIMMAX9201,,,∀1ns,LVTTL/TTL,,CPLD,HOLDQGATEQCLEAR,HOLDQGATE,,,GATECLEAR,,,[8]:QGATE,QGATE,QCLEAR,Q()QGATE,CPLD,,,QGATEQCLEAR,(CPLD),,,Vo0,CPLDDMOS,(ton∀1ns,toff∀10ns)6:3Q24,,:o=-1C#IOdt[0](2):IO=NIin,,2516,A/DMultiplexerADADG73232,CPLPCPLD,,T(T=N*CLK,N,CLK),5I/O∃00000%,∃00001%,∃00010%∃11111%∃00000%,∀30ns,QACVOUT,,,,Q,EinVo(t),VO(t)=QCf=EIN!&e&1Cf[3](3)Vo(t)Vo(t)!,Vo(t)!ADC,,QAC,,[10]3PhillipsCAMACModel7120Q,692QAC(50∀),,CAMACNAF,0600PCQ,PhillipsCAMACModel7120GATEQ50ns,,CPLD,VHDL,QGATE,QCLEARHOLD,QAC,PXI6133Q,Labview8.0,8QAC,QAC,,,NIPXI6133,Labview8.0,:1QAC50pc80pc100pc120pc140pc160pc200pc250pc300pc12.4∋1.9∋2.3∋2.0∋1.7∋2.2∋2.4∋2.3∋2.4∋22.6∋2.1∋2.3∋2.1∋1.8∋2.3∋2.7∋2.3∋2.5∋(1,0300pc,2,0600pc)4QACQ160pC,(2.2∋)5QACXQ,B,C,D4(1):0600pC(50∀)(2):05V(470pF)(3):8(4):∀1M(TQGATE∀1#s)(5):0.2%ofFSR(6):0.2%(120pC)5,,,,.816,,,,ASIC:[1],,,.CSR[J],,2005,28(6):472473.[2].CPLD/FPGAVHDL.[M].:,2007.[3],[M],,1989.(10).[4]S.Inaba,K.Takamatsu,etal.DevelopmentofaQACwithdualsensitivitiesusingabipolarfullcustomICtechnology[J].NuclearInstrumentsandMethodsinPhysicsResearch.2000,A455:683697.693[5]S.Inaba,T.Tsuru,etal.Amonolithicchargetoamplitudeconverter(QAC)chipforfastreadoutofphotomultiplier[J].NuclearInstrumentsandMethodsinPhysicsResearch2000,A442:309315.[6].()[M],2000.[7],.QAC[J],,2005,25(6):715.[8],,[J],,2008,31(6).[9]..[M].:,2001.[10]N.M.Nikityuk,V.N.Samoylov,Detectorelectronicsforexperimentsatthelargehadronscollide[J],PhysicsofParticlesandNuclei,2006,37.Adesignofnewmultichannelhighprecisionchargetoconvert(QAC)circuitWUMing1,2,SUHong1,MaXiaoli1,QianYi1,2,DongChengfu1(1InstituteofModernPhysics,theChineseAcademyofScience,Lanzhou730000;2graduateschooloftheChineseacademyofscience,Beijing100049)Abstract:Anewwayandcircuitdesignedformultichannelhighprecisionchargetoamplitudeconversion(QAC)isintroducedinthispaper.ThenewQACcircuitperformstheconversionoffastcurrentpulsesgeneratedbyaphotomultipliertube(PMT)tovoltagesignals.TheoutputvoltageoftheQACcircuitisdirectlyfedtothemultifunctionDAQ.Thissystemisoptimalforfastcurrentsignals.Thenewcircuithasfeaturessuchashighprecision,highspeedofconversion,lesscomponents,widerangeofinput(0600pC)andlowcost.Thecircuitthatwedevelopedcanbewidelyusedtoconstructfrontendreadoutelectronicsofdataacquisitionsysteminmeasurementsystemofnuclearphysicsexperimentwithlargescaledetectorarray.AndthisdesignisusefulforresearchingoftheASICprinciplemodelofthecircuitinthenextstep.Keywords:QACmultichannelhighspeedhigherprecisiondesignASIC(689,Continuedfrompage689)TheDesignOfRadioactiveSourceTrackingmanagementSystemBasedonRFIDYANYongjun,ZHOUJianliang(SchoolofNuclearScienceandTechnology,UniversityofSouthChina,Hengyang421001,Hunan,China)Abstract:ThepaperintroducesasolutionofsafetyandSecuretymanagementsystemofradioactivesourceinstorageandusebyemployingadvancedRFIDtechnologyandcomputerdatabasetechnology.Andmakesomesuggestionsforfurtherimprovement.Keywords:radioactivesource,safetyandSecurety,RFID694