CD4046调制解调

CD4046(,,430072)CD4046,11,,,,,RS223230,20kbps,,CD4046211TXDR3LM324-,LM324+R1R2,215VR4R3,1ö50V5V,LM324A3V2VACD4046(VCO),CD404612:(a);(b)A;(c)B6219986©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5,BXB(t)[1]:XB(t)=X0+$X(1):X0215V,C1R5$XuA(t)215V(1),uA(t)215V,X0;uA(t)3V(),$X,X2X0;uA(t)2V(),$X,X1X02,31,:PLL;PLL,,,(1),,3C3X1X2,LM324CD4046R8R9,()C4R10,X0(X1X2),X0$X0,$X0,,,VCOX0,[1]:uC(t)=1k0$XûH(jX)ûuA(t)(2):1ök0;ûH(jX)û;uA(t)A34(a)(b),ûH(jX)û1,[1]:7219986©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.uC(t)=$Xk0uA(t)(3)(3),4(a),TTL,,TTL414(a),4(b),,,,,LM3935VD2VD14(a)VD2,,,,,VD1,,,,VD2,55LM324,R18R19,LM324VREF215V(D1D2):LM393AC,7,,D1,D2,LM393B-+,017V,R13=R14D:VD=VREF-0135(V),VD1VREF-0.35(V)C,VD1,7,1CVD1,7,1LM393AC,7,,D1,D2,LM393B-+,D:VD=VREF+0135(V),VD2VREF+0135(V)C,VD2,7,1CVD2,7,1,D1D2,,(VD2-VD1),017V,51CD4046,,,,8219986©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.PC(,,210018)PCPC,,,PCBIOS,1912kbös,PC9600,,PC,,11PC,509600,INS8250PC,,3F8H(COM1),IRQ4,2F8H(COM2),IRQ3INS825098,A2A1A01COM21INS8250DLABA2A1A00000()()2F8H00012F9Hx010()2FAHx0112FBHx100MODEM2FCHx1012FDHx110MODEM2FEH1000()2F8H1001()2F9HINS8250,16,,:=(16)PC8250118432MHz,2,FE729H16ROM()[1]:1,1993[2]:1,1992[3]:1:,1994(:1998-06-25)9219986©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.AbstractsofSomeArticlesinThisIssueDesignforTunnelKilnFuzzyControlSystemöWuYanwenElectronics&Automation121998,27(6)12811Thispaperputsforwardadesignfortunnelkilnfuzzycontrolsystemforceramicindustry,in2cludingananalyticalexpressionoffuzzycontrolrules,totalconfigurationofsystemhardwareandmainsoftwarefunctions.Thesystemhastwolev2els:aPCisusedassupervisorycomputertorealizesupervisionandmanagementoftheproductionpro2cesses,whileanSTDbusindustrialcontrollerisusedascontrolcomputerandageneral2purposemulti2functionfuzzycontrollerasredundancycom2puter.Withelectricovensimulationinsteadofce2ramictunnelkiln,itprovesthatthisdesignhasba2sicallymettherequirementofcontrolandadjust2ment,andachievedtheaimofreal2timecontrol.Keywords:fuzzycontrol,tunnelkiln,superviso2rycomputer,controlcomputerAComputerManagementSystemforCoalWeighingBeltinPowerPlantöTongAnminElectronics&Automation121998,27(6)121215Itissignificanttocontrolandmanagethecoalconveyingsystemwithcomputerssincethecoalconsumptioninafirepowerplantisoflargeamount.Thispaperintroducesthedesignprinciple,hardwareconfigurationaswellassoftwarefunc2tionsforacomputermanagementsystemforcoalweighingbelt.Thecompositemeasurementerrorof8controllableweighingbeltsislessthan0.25%withamaximumcoalflow1200töh.Twoyearsofoperationprovesthatthedesign,approvedbyvali2dationatprovisionallevel,issuccessfulwithgoodeconomiceffect.Keywords:firepowerplant,coal2conveyingsystem,weighingbelt,distributedcontrol,comput2ermanagementDesignofMPU-ControlledAllDigitalServoSys2temöGuoGuangming,CuiSongfeiElectronics&Automation121998,27(6)121517Theprinciple,designandapplicationofanMPU2controlledalldigitalPWMservosystemareintroduced.ThesystemoperatesinPWMmodeus2ingIGBTmodulesaspowerdriveunitand8098s2ccomputerascentralcontroller.Withthissystem,goodeffecthasbeengainedintechnicalreformationofabigtireretrofittingandcarvingmachine.Keywords:alldigitalservo,PWM,IGBTpowermodule,8098s2ccomputerDesignforNCODMeasuringSystemöDuKainanElectronics&Automation.21998,27(6)121720Theperformance,hardwareösoftwarestructureandfeaturesofNCODmeasuringsystemforaxlepartsaredescribedwithanerroranalysisofpreci2sion.Basedons2ccomputerasitscore,thesystemcontrolstheentireprocessofthemeasuringwithfunctionssuchasautomaticmeasuringandrecord2ing,andafter2eventprompt.Onepersoncanoperatemorethanonesystem1Measuringrange:axial1650mm;radial0120mmwithprecision0.01mm.Keywords:OD,automaticmeasuring,s2ccom2puter,errorSerialCommunicationinSmallDistributedVariableFrequencyDriveSystemöLiuMingjianElectronics&Automation121998,27(6)122325Takingthepracticalsmalldistributedvariablefrequencydrivesystemasanexample,aninterfacecircuitofserialcommunicationbetweenPCandAT89C2051s2ccomputerisdescribedandanewcommunicationmethodisputforwardusingQBA2SIClanguagetodothemulti2communicationpro2gramming.Thereceivedsignalearesentbackforcomparison,andthereisnoneedtodistinguishad2dressframefromdataframe,buttheyaresenttogetherasacharacterstring.Thismethodfeatureswithcompacthardwareandsimpleandreliablesoft2ware.Keywords:s2ccomputer,DCS2distributedcon2trolsystem,serialcommunication,communicationprotocolDataFrequencyMODEMbyCD4046inSerialCom2municationöHuangHairongElectronics&Au2tomation121998,27(6)122629ThispaperexplainstheprincipleonhowtouseCD4046phase2lockedlooptorealizesignalfrequen2cyMODEMcircuitinserialdigitalcommunicationandhowtouseSchmidtcircuittoreformthede2modulatedwaveformandrecoverthedigitalsignals.Thesecircuitscanbeusedtocommunicatebetweendifferentcomputersortodetectsignals.Keywords:serialcommunication,phase2lockedloop,frequencymodulation,demodulation,Schmidtcircuit4519986©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.