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1、Operationalamplifiertheoryandapplications1theprincipleofop-ampOpampisthemostwidelyusedofadevice,althoughthedifferentstructureofdifferentoperationalamplifier,buttheexternalcircuit,itscharacteristicsarethesame.Opampisusually4parts,biascircuits,inputstage
2、,intermediate-level,outputlevel,whichisgenerallyusedinputstagedifferentialamplifiercircuit(inhibitorypower),themiddleclassingeneraltheuseofactiveloadcircuitloadsthetotalradio(increasethemagnification),thecomplementaryoutputstagegenerallysymmetricaloutp
3、utstagecircuit(drivecircuittoincreasethecapacityoftheload),hereisabriefintroductionabouttherealizationofthespecificcomplex.Industries,anoperationalamplifierusedtomeasuretheperformanceofmanyoftheindicators,theactualoperationalamplifierisgenerallybelieve
4、dthattheclosertheidealopamp,thebetter,theclassroominvolved,weareonlyaskingtheequivalentinputresistanceofinfinity,infiniteopen-loopgain,Infact,therearemanyotherindicators,Iwill,areyouabriefintroduction,theperformanceofoperationalamplifiersincludingthefi
5、veindicators,open-loopdifferential-modevoltageamplificationfactor,themaximumoutputvoltage,differential-modeinputresistance,outputresistance,commonmoderejectionratioCMRR.(Open-loopdifferential-modeisthemagnificationontheintegrateddeliverywithoutaddition
6、alfeedbackloopincaseofdifferential-modevoltageamplification.Maximumoutputvoltageissayingthatitreferstoacertainvoltage,theintegratedoperationalamplifierisnotthelargestoutputvoltagedistortionpeak-peak.differential-modeinputresistancereflectsthesizeofinte
7、gratedoperationalamplifierinputdifferential-modeinputsignaltoobtainthecurrentsizeofthesource.requiringthegreaterthebetter.reflectthesizeoftheoutputresistanceofanintegratedtransportonthesmall-signaloutputloadcapacity.CMRRshownontheintegratedoperationala
8、mplifiercommon-moderejectionofinputsignals,whichisdefinedwiththedifferentialamplifiercircuit.CMRRthebetter.)Figure1op-ampcharacteristiccurveFigure2op-ampinputandoutputterminalmapFigure1isthecharacteristiccurveofamplifierisgenerallyusedo
