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1、Operationalamplifiertheoryandapplications1theprincipleofop-ampOpampisthemostwidelyusedofadevice,althoughthedifferentstructureofdifferentoperationalamplifier,buttheexternalcircuit,itscharacteristicsarethesame.Opampisusually4parts,biascircuits,inputstag
2、e,intermediate-level,outputlevel,whichisgenerallyusedinputstagedifferentialamplifiercircuit(inhibitorypower),themiddleclassingeneraltheuseofactiveloadcircuitloadsthetotalradio(increasethemagnification),thecomplementaryoutputstagegenerallysymmetricalou
3、tputstagecircuit(drivecircuittoincreasethecapacityoftheload),hereisabriefintroductionabouttherealizationofthespecificcomplex.Industries,anoperationalamplifierusedtomeasuretheperformanceofmanyoftheindicators,theactualoperationalamplifierisgenerallybeli
4、evedthattheclosertheidealopamp,thebetter,theclassroominvolved,weareonlyaskingtheequivalentinputresistanceofinfinity,infiniteopen-loopgain,Infact,therearemanyotherindicators,Iwill,areyouabriefintroduction,theperfbnnanceofoperationalamplifiersincludingt
5、hefiveindicators,open-loopdifferential-modevoltageamplificationfactor,themaximumoutputvoltage,differential-modeinputresistance,outputresistance,commonmoderejectionratioCMRR.(Open-loopdifferential-modeisthemagnificationontheintegrateddeliverywithoutadd
6、itionalfeedbackloopincaseofdifferential-modevoltageamplification.Maximumoutputvoltageissayingthatitreferstoacertainvoltage,theintegratedoperationalamplifierisnotthelargestoutputvoltagedistortionpeak-peak・differential-modeinputresistancereflectsthesize
7、ofintegratedoperationalamplifierinputdiflferential-modeinputsignaltoobtainthecurrentsizeofthesource,requiringthegreaterthebetter.reflectthesizeoftheoutputresistanceofanintegratedtransportonthesmall-signaloutputloadcapacity.CMRRshownontheintegratedoper
8、ationalamplifiercommon-moderejectionofinputsignals,whichisdefinedwiththedifferentialamplifiercircuit.CMRRthebetter.)Figure1op-ampcharacteristiccurveFigure2op-ampinputandoutputterminalmapFigure1isthecharacteristiccurveofamplifierisgenerallyused
