雨课堂学堂在线学堂云《Low Frequency Electronic Circuit（河北工业）》单元测试考核答案

第1题Ifenoughtrivalentelementsareaddedinton-typesemiconductors,theycanbetransformedintop-typesemiconductors.()第2题WhenthereisnoilluminationandvoltageappliedtoPNjunction,thecurrentflowingthroughPNjunctioniszero.()第3题Itisfeasibletoconnect1.5Vdrycelldirectlytobothendsofdiodetomeasureitsterminalpotential.()第4题Therectifiercircuitusestheunidirectionalconductivityofdiode.()第5题Whenthetemperatureishighenough,thecarrierconcentrationproducedbytheintrinsicexcitationwillbegreaterthantheimpurityionization,sothediodehasthehighestworkingtemperature.Whentheambienttemperatureishigherthanthistemperature,thediodecannotworknormally.()第6题ThevaractordiodeismadeofthecapacitanceeffectofPNjunction.()第7题WhentheinputvoltageUIandloadcurrentILchange,theoutputvoltageofthevoltagestabilizingcircuitisabsolutelyunchanged.()第8题WhenthepositivevoltageisappliedtothePNjunction,theSpaceChargeLayerwillbe().ANarrowBBasicallyunchangedCWide第9题N-typesemiconductorcanbeformedbyadding()elementtotheintrinsicsemiconductor,andp-typesemiconductorcanbeformedbyaddingC)element.AFivevalenceBfourvalenceCthreevalence第10题Inp-typesemiconductor()AHolesaremostcarriers,electronsarefewcarriersBElectronsarethemajorityofcarriers,holesaretheminorityofcarriersCThereareasmanyholesaselectrons第11题ThecharacteristicsofPNjunctionare()AReverseconductivityBunidirectionalconductivityCbidirectionalconductivity第12题Whenthetemperaturerises,thereversesaturationcurrentofthediodewillbe().AIncreaseBUnchangedCDecrease第1题ThedifferencebetweenNPNandPNPtransistorsis().AMadeoftwodifferentmaterials:siliconandgermaniumBDifferentimpurityelementsaddedCThelocationofPzoneandNzoneisdifferentDPinarrangementisdifferent第2题Inthetriodeamplifiercircuit,themeasuredgroundpotentialsofthethreepinsofthetransistorare:VA=-11V,VB=-6V,VC=-6.7V,thenthetransistorbelongsto().ANPNtypegermaniumtubeBNPNtypesilicontubeCPNPtypegermaniumtubeDPNPtypesilicontube第3题Transistorparametersaregreatlyaffectedbytemperature.Whenthetemperaturerises,thechangeofthetransistor's,,

is().Aincrease,anddecreaseBand

increase,decreaseCand

decrease,

increaseD、

and

allincrease第4题Whenthetransistorworksinthesaturationregion,thevoltageappliedtotheemitterjunctionandcollectorjunctionshouldbe:().ATheformerisreversedandthelatterisreversedBTheformerisbiasedandthelatterisreversedCTheformerisbiasedandthelatterisbiased第5题ForPNPtubesworkinginanamplifiedstate,eachelectrodemustmeet().AVc>Vb>VeBVc<Vb<VeCVb>Vc>VeDVc>Ve>Vb第6题Inthefollowingdata,whichistheNPNtransistorintheamplifiedstate?()AVBE>VBE(on),VBEBVBE>VBE(on),VBE>VCED.VBEVCE第7题Atriodeworkingintheamplifierregion,whentheIBincreasesfrom20μAto40μA,theICvaluechangesfrom1mAto2mAthenitsβvalueisabout().A10B50C80D100第8题Whentheemitterjunctionandcollectorjunctionofthetransistorarereverse-biased,thecollectorcurrentofthetransistorwillbe()AIncreaseBDecreaseCReverseDAlmostzero第9题Ifyouwanttocheckwhetherthetransistorintheamplificationcircuitisinthestaticworkingstate(workingarea),theeasiestwayistomeasure()AIBQBVBECICQDVCEQ第10题Whenthetransistorisinamplificationmode,thesmallsignalcircuitmodelisdescribedasfollows:()ARelationshipwithBRelationshipwithCRelationshipwithDRelationshipwith第11题Whenthetemperaturerises,thechangeofβ,penetrationcurrentandUBEofthesemiconductortransistoris()ABigger,bigger,basicallythesameBsmaller,smaller,basicallythesameCGetbigger,getsmaller,getbiggerDgetsmaller,getbigger,getbigger第12题Transistorcommon-emitteroutputcharacteristicsareusuallyexpressedbyafamilyofcurves,whereeachcurvecorrespondstoaspecific().AiCBuCECiB第13题Theemittercurrentofatransistorisequalto1mAandthebasecurrentisequalto20μA,thenitscollectorcurrentisequalto().A0.98mAB1.02mAC0.8mAD1.2mA第14题ParametersoftransistorarePCM=800mW,ICM=100mA,VBR()=30V,inwhichofthefollowingcasesisitnormaloperation?()AVCE=15V,IC=150mAB.VCE=20V,IC=80mABVCE=35V,IC=100mAD.VCE=10V,IC=50mA第15题Theconditionsforthetransistortoworkinanamplifiedstateare:thecollectorjunctionisreverse-biasedandtheemitterjunctionisforward-biased.()第16题TransistorsaredividedintoNPNtypeandPNPtypeaccordingtosemiconductormaterials.()第17题ThecrystaltransistorhastwoPNjunctions,andthediodehasonePNThecrystaltransistorhastwoPNjunctions,andthediodehasonePNjunction,sothetwodiodescanbeconnectedinreverseasatriode.()第18题NPNtransistorismadeofsiliconmaterial.()第19题ThesmallsignalcircuitmodelwhenNPNandPNPtransistorsworkintheamplificationmodeisdifferent.()第20题TheconditionforPNPtypetransistortoworkinamplificationmodeisVCE>-0.3V()Chapter3quiz第1题A

Equalto0BNegativepolarityCPositivepolarityDUnabletodeterminepolarity第2题AVGS<VGS(th)VDS>VGS-VGS(th）BVGS>VGS(th)VDS>VGS-VGS(thCVGS>VGS(th)VDS<VGS-VGS(th）DVGS<VGS(th)VDS<VGS-VGS(th）第3题ATrueBFaultCCan'tjudge.第4题ATrueBFaultCCan'tjudge第5题ATrueB

FaultC

Can'tjudge.第6题AN-EMOSBP-EMOSCN-DMOSDP-DMOS第7题AN-EMOS

BP-EMOS

CN-DMOSDP-DMOS

第8题AN-EMOSBP-EMOSCN-DMOSDP-DMOS第9题AN-EMOSBP-EMOS

CN-DMOS

DP-DMOS

第10题AVGS<VGS(th)VDS>VGS-VGS(th）BVGS>VGS(th)VDS>VGS-VGS(th）CVGS>VGS(th)VDS<VGS-VGS(th）DVGS<VGS(th)VD<VGS-VGS(th）第11题ACo-sourceBco-drainCco-gate第12题AN-EMOSBP-EMOSCN-DMOSDP-DMOS第13题AN-EMOSBP-EMOSCN-DMOS

DP-DMOS第14题A

TrueBFault

CCan'tjudge第15题ATrueBFaultCCan'tjudge第16题ATrueBFaultCCan'tjudge第17题ACo-sourceBco-drainCco-gate第18题ACo-base，co-collection,co-ejectionBDC,AC,microequivalentCSeries,parallel,interstageDCo-gate,co-drain,co-source第19题ATrueBFaultCCan'tjudge.第20题ATrueBFaultCCan'tjudge第21题ATrueBFaultCCan'tjudge第22题AN-EMOSBP-EMOSCN-DMOSDP-DMOS第23题AN-EMOSBP-EMOSCN-DMOSDP-DMOS第24题AN-EMOS

BP-EMOSCN-DMOSDP-DMOS第25题AN-EMOSBP-EMOS

CN-DMOSDP-DMOS

Chapter4quiz第1题Thelargerthecommon-moderejectionratioofthedifferentialamplifiercircuit,itindicatesthatthecircuit().AThemorestablethemagnificationBThegreatertheACmagnificationCThegreatertheDCmagnificationDThestrongertheabilitytoinhibittemperaturedrift第2题Fordifferentialmodeequivalentcircuitanalysis,thefollowingdescriptioniscorrect().AResistanceREEisequivalenttozeroinadifferentialmodeequivalentcircuitBThedouble-endgainofadifferentialmodeequivalentcircuitisequalto-2gmR'LCThedouble-endgainofadifferentialmodeequivalentcircuitisequalto-gmR'LDResistanceREEisequivalentto2REEindifferentialmodeequivalentcircuits正确答案：AC第3题Forcommon-modeequivalentcircuitanalysis,thefollowingdescriptioniscorrect().AResistanceREEisequivalenttozeroinacommon-modeequivalentcircuitBResistanceREEisequivalentto2REEinacommon-modeequivalentcircuitCThedouble-endgainofacommon-modeequivalentcircuitisequalto0DThesingle-endedgainofacommon-modeequivalentcircuitisequalto-gmR'L正确答案：BC第4题Amplifierscanbedividedinto()accordingtothestrengthofthesignal.ADcamplifierBSmallsignalamplifierCAudioamplifierDPoweramplifier正确答案：BD第5题Thecorrectdescriptionfortheamplifierbiascircuitis().AThebiascircuitisusedtosetthestaticoperatingpointoftheamplifiercircuit,includingIB,IC,VCEQBThebiascircuitshallensurethatthestaticoperatingpointisnoteasilyaffectedbytheambienttemperatureCThebiascircuitwillaffectthedynamicrangeoftheamplifiertubeDThebiascircuitistosetthestaticDCoperatingpointoftheamplifiertube,soitwillnotaffecttheamplificationoftheACsignal正确答案：ABC第6题WhathappenswhenstaticoperatingpointQissettoohighortoolow?()AIfstaticoperatingpointQissettoohigh,saturationdistortionwilloccur.BStaticoperatingpointQissettoohigh,resultingincutoffdistortion.CIfstaticoperatingpointQissettoolow,saturationdistortionwilloccur.DStaticoperatingpointQissettoolow,resultingincutoffdistortion.正确答案：AD第7题Flattopdistortionincludes:()ASaturationdistortionBCut-offdistortionCFrequencydistortionDTransientdistortion正确答案：AB第8题Theparametersthataffectthethermalstabilityofstaticoperatingpointofamplifierare:()AβBVBE(on)CICBODVCEQ正确答案：ABC第9题Whenthetemperaturerises,forsimplebiascircuits,thefollowingdescriptioniscorrect.()Aβincreased,ICQincreased,VCEQdecreased,staticoperatingpointQincreased,closetothesaturationarea.Bβdecreases,ICQdecreases,VCEQincreases,andstaticoperatingpointQdecreases,approachingthecutoffarea.CPronetosaturationdistortion.DPronetocut-offdistortion.正确答案：AC第10题Forthepartialvoltagebiascircuit,thefollowingdescriptionsarecorrect:()AThepartialvoltagebiascircuitrealizesthestabilityofstaticoperatingpointbyregulatingthepartialvoltageofRB1,RB2andRE.BTheVEQofthepartialvoltagebiascircuitisusuallysetat1-3V,or0.2VCC.CThepartialvoltagebiascircuitisalsosuitableforthebiassettingofFets.DThevaluesofRB1andRB2inthepartialvoltagebiascircuitshouldnotbetoolarge.Ensurethatthepassingcurrentisgreaterthan10IB.正确答案：ABCD第11题Couplingconnectionsthatneedtobeconsideredinamplifiercircuitsmainlyinclude:()AThesignaloriginatesfromtheconnectionbetweentheamplifiers.BConnectionsbetweenamplifiers.CConnectionbetweenamplifierandtransducer.DConnectionoftheamplifiertothepowersupply.正确答案：ABC第12题Thefollowingdescriptionofcapacitivecouplingiscorrect:()ACapacitivecouplingallowsACsignalstopassthroughwhileblockingDCtransmission.BCapacitivecouplingcanisolatethestaticoperatingpointsbetweenadjacentstages.CCapacitivecouplingisalsoknownasresistance-capacitancecoupling.DIncapacitivecoupling,thecapacitancevalueshouldbesuchthattheACsignalisapproximatelyshort-circuitedonthecapacitance.正确答案：ABCD第13题Thefollowingdescriptionofdirectcouplingiscorrect:()ADirectcouplingneedstosolvetheproblemoflevelconfigurationbetweenstages.BDirectcouplingrequiresconsiderationoftheinteractionofstaticoperatingpointsbetweendifferentlevels.CThemixeduseofNPNandPNPtriodeindirectcouplinghelpstoimprovethelevelconfigurationproblem.DInthedirectcoupling,thetemperatureinfluenceofthepreviousworkingpointwillbetransmittedtothenextlevel.正确答案：ABCD第14题Basicperformanceindicatorsofamplifiersinclude:()AInputresistanceRiBOutputresistanceRoCGainDStaticoperatingpoint正确答案：ABC第15题Thefollowinginputandoutputresistorsaredescribedcorrectly:()AInputresistanceisdefinedastheratioofinputvoltagetoinputcurrent.BTheinputresistancecanberegardedastheloadofthesignalsource.CTheoutputresistancecanbeobtainedbytheformula-vot/ion.DTheoutputresistancecanbeviewedastheinternalresistanceoftheamplifierastheexcitationsourceoftheloadRL.正确答案：ABCD第16题Amplifiergainincludes:()AVoltagegainAvBCurrentgainAiCMutualresistancegainArDMutualconductancegainAg正确答案：ABCD第17题Regardingthesourcegainoftheamplifier,thecorrectdescriptionis:()AForvoltagegain,thegreatertheinputresistance,thegreaterthesourcegain.BForvoltagegain,thesmallertheinputresistance,thegreaterthesourcegain.CForcurrentgain,thegreatertheinputresistance,thegreaterthesourcegain.DForcurrentgain,thesmallertheinputresistance,thegreaterthesourcegain.正确答案：AD第18题Formultistageamplifiers,thecorrectdescriptionis:()ATheinputresistanceofthemultistageamplifierisequaltotheinputresistanceofthefirststageamplifier.BTheoutputresistanceofthemultistageamplifierisequaltotheoutputresistanceofthelastamplifier.CThegainofamultistageamplifierisequaltothesumofthegainofeachamplifier.DThegainofamultistageamplifierisequaltotheproductofthegainofeachamplifier.正确答案：ABD第19题Amplifierdistortioncanbedividedinto:()ALineardistortionBNonlineardistortionCCombinationdistortionDCurrentdistortion正确答案：AB第20题Whatiscorrectaboutthelineardistortiondescriptionofanamplifieris:()ALineardistortiondoesnotintroduceanewfrequencycomponentattheoutput.BLineardistortionincludesfrequencydistortionandtransientdistortion.CThedistortioncausedbyamplitudegainvaryingwithfrequencyiscalledamplitudedistortion.DThedistortioncausedbyphaseshiftwithfrequencychangeiscalledphasedistortion.正确答案：ABCD第21题Whatiscorrectaboutthenonlineardistortiondescriptionofamplifiersis:()AAnewfrequencycomponentisgenerated.BItcanbemeasuredbythedistortiondegreeTHD.CItiscausedbythenonlinearityofthevoltammetrycharacteristicsofsemiconductordevices.DInthemid-bandoftheamplifier,thereisnononlineardistortion.正确答案：ABC第22题Triodethreebasicconfigurationamplifiersinclude:()ACommonemitterconfigurationBCommoncollectorconfigurationCCommonbaseconfigurationDCommonsourceconfiguration正确答案：ABC第23题Intheperformanceanalysisofcommonemitterconfiguration,thecorrectonesare:()AInputresistanceRi=rb'eBOutputresistanceRo=RC//rceCVoltagegainAv=-gmRL'DLoadshort-circuitcurrentgainAin=β正确答案：ABCD第24题Intheperformanceanalysisofcommonbaseconfiguration,thecorrectonesare:()AInputresistanceRi=reBOutputresistanceRo=RC//rceCVoltagegainAv=gmRL'DLoadshort-circuitcurrentgainAin=-α正确答案：ABCD第25题Intheperformanceanalysisofcommoncollectorconfiguration,thecorrectonesare:()AInputresistanceRi=rb'E+(1+β)BOutputresistanceRo=(rb'e+Rs)/(1+β)CVoltagegainAv≈1DLoadshort-circuitcurrentgainAin=-(1+β)正确答案：ABCD第26题Thefollowingstatementaboutthethree-configurationamplifieriscorrect:()AMinimumcommon-baseconfigurationinputresistance.BThecommoncollectorconfigurationinputresistanceismaximum.CThetheoreticalvoltagegainoftheco-emitterisveryhigh.DThecommoncollectorconfigurationvoltagegainisalwayslessthan1.正确答案：ABCD第27题Inordertoreducetheoutputresistanceandincreasethevoltagegainoftheamplifier,the()configurationcanbeusedastheoutputstage.ACommonemitterconfigurationBCommoncollectorconfigurationCCommonbaseconfiguration第28题Currentadaptersandvoltagefollowersreferto()and()configurations,respectively.ACommonbaseconfigurationandcommonsetconfigurationBCogenerationconfigurationandcosetconfigurationCCommongenerationconfigurationandcommonbaseconfigurationDCommonsetconfigurationandcommonbaseconfiguration第29题WhatcombinationofcircuitsisaDarlingtoncircuit?()ACommonsetconfigurationandcommonbaseconfigurationBCommonbaseconfigurationandcommonsetconfigurationCCommonsetconfigurationandcommongenerationconfigurationDCogenerationconfigurationandcosetconfiguration第30题Thetwo-stageamplifiercircuitisshowninthefigure.TheamplifiercomposedofT1andT2tubesisa()configuration.ACommonsetconfigurationandcommonbaseconfigurationBCommonbaseconfigurationandcommonsetconfigurationCCommonsetconfigurationandcommongenerationconfigurationDCogenerationconfigurationandcosetconfiguration第31题AfterincreasingtheemitterresistanceRE,theperformanceindicatorsoftheco-emitteramplifierareimproved,mainlyreflectedin().ATheinputresistanceincreasessignificantly.BCanimprovecurrentgain.CAlthoughthevoltagegaindecreases,itbecomesstableandgetsridoftheinfluenceoflargegaindispersionwithbetavalue.DThevoltagegainissignificantlyimproved.正确答案：AC第32题Theuseofactiveloadinsteadofaco-issuelargeRC,performanceimprovementreflectedin:()ACanimprovevoltagegainBImprovesinputresistanceCCanimprovecurrentgainDItcansolvethecontradictionbetweenDCpathandACpathtothedifferentrequirementsofresistanceRC正确答案：AC第33题ThethreeconfigurationsofFEtsare:()ACommonsourceconfigurationBCommon-gridsystemCCommondrainconfigurationDCommoncollectorconfiguration正确答案：ABC第34题Theperformancecharacteristicsofcommonsourceamplifierare:()ATheinputresistanceisinfinite.BThevoltagegainisexpressedas-gmR'l,thesameasinthecommonemitterform.CTheoutputresistanceisinfinite.DAcommon-sourceamplifierhasnoinputcurrentandnocurrentgain.正确答案：ACD第35题Theperformancecharacteristicsofcommongateamplifierare:()ATheinputresistanceissmall,equalto1/gm.BTheloadshort-circuitcurrentgainis-1.CThevoltagegainisconsistentwiththecommonbaseconfigurationandisgmR'L.DTheoutputresistanceispositiveinfinite.正确答案：ABC第36题Theperformancecharacteristicsofcommondrainamplifierare:()ATheinputresistanceispositiveinfiniteBThevoltagegainisapproximately1CLowoutputresistance正确答案：ABC第37题Thefollowingstatementiscorrectlydescribed:()ASinceig=0,theinputresistanceofCGandCSconfigurationispositiveinfinity.BTheinputresistanceofthecommon-gateislargerthanthatofthecommon-baseinput.CTheoutputresistanceofthecommondrainisgreaterthanthatofthecommonsetoutput.DThetransconductancegmoftheFETissmallerthanthatofthetriodetransconductance.正确答案：ABCD第38题ComparedfromthesizeofthevoltagegainoftheintegratedMOSamplifier,whichofthefollowingsequenceiscorrect?ACMOS>EDMOS>EEMOSBCMOS>EEMOS>EDMOSCCMOSDCMOS第39题Thefollowingstatementsarecorrect:()ACMOSreferstocomplementaryPMOSandNMOSintegratedamplifiers.BCMOSvoltagegaincanreach500-1000.CSubstrateeffectscancausethegainoftheintegratedMOSamplifiertodecrease.DThegainperformanceofamplifiercanbeimprovedeffectivelybyusingMOSastheactiveload.正确答案：ABCD第40题Aboutthecharacteristicsofdifferentialamplifiers,thedescriptioniscorrect:()AThecircuitstructureanddeviceparametersaresymmetricalandconsistent.BIthastwoinputsandtwooutputs.CCouplingmodeThedirectcouplingmodeisadopted.DThere'sonlyonepositivepowersource.正确答案：ABC第41题HowtodetermineDCstaticoperatingpointofdifferentialamplifier?AFindVE,VB=0,VE=VB-0.7=-0.7.BFindthecurrentIEEflowingthroughresistanceREE,IEE=(VE-VEE)/REE.CFindtheemittercurrentIE,ICofeachtube,IE=1/2IEE.DFindVCEQ,VCEQ=VCC-VE-RCXIC.正确答案：ABCD第42题Thecorrectdescriptionofdifferentialmodesignalandcommonmodesignalis:()AAdifferentialmodesignalisthedifferencebetweentwosignals.BAdifferentialmodesignalishalfthedifferencebetweentwosignals.CAcommon-modesignalisthesumoftwosignals.DAcommon-modesignalistheaverageoftwosignals.正确答案：AD第43题Twoarbitrarysignalsvi1=12V,vi2=0V,whatarethecorrespondingcommonmodesignalsvidandvic?Avid=12

vic=12Bvid=6vic=6Cvid=12

vic=6Dvid=6vic=12第44题Whatisthemainreasonwhythedoubleoutputdifferentialamplifiercircuitcaninhibitzerodrift?()ALargevoltageamplificationBGoodcircuitsymmetryCHighinputresistanceDAbipolarpowersupplyisusedChapter5quiz第1题Inthecasethattheinputsignalisunchanged,ifthe()ofthebasicamplifierafterthefeedbackisintroduced,itmeansthattheintroducedfeedbackisnegativefeedback.ATheinputresistanceincreasesBThenetinputvolumedecreasesCThenetinputvolumeincreasesDOutputincreases第2题Toincreasetheinputresistanceandoutputresistanceoftheamplifier,youshouldintroduce()Negativefeedback.AParallelcurrentsBVoltageseriesCCurrentinseriesDVoltageparallel第3题Known:toobtainacurrent-voltageconversioncircuit,shouldbeintroducedintheamplifiercircuitAKnown:toobtainacurrent-voltageconversioncircuit,shouldbeintroducedintheamplifiercircuitBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第4题Toconvertthevoltagesignalintoacurrentsignalproportionaltoit,itshouldbedrawnintheamplifiercircuitin()AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第5题Toobtainalargercurrentfromthesignalsourceandstabilizetheoutputcurrent,itshouldbeintroducedintheamplifiercircuit()AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第6题Inordertoreducethecurrentobtainedbythecircuitfromthesignalsourceandincreasetheloadcapacity,itshouldbeintroducedintheamplifiercircuit()AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第7题ThefeedbackintheDCpathiscalledDCfeedback,andthefeedbackintheACpathiscalledACfeedback.Theabovestatementis().AThat'srightBWrongCNotabletotellrightfromwrong.第8题Fortheamplifiercircuit,theso-calledopenlooprefersto()ANosignalsourceisavailableBNofeedbackpathCNopowersupplyDNoload第9题Ifthemagnificationoftheamplifiercircuitisnegative,thefeedbackintroducedmustbenegativefeedback.Theabovestatementis()AThat'srightBWrongCNotabletotellrightfromwrong.第10题Thenegativefeedbackamplifyingcircuitdiagramisshown.R2feedbacktypesare().AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第11题Thenegativefeedbackamplifyingcircuitdiagramisshown.R2'sfeedbacktypeis().AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第12题Inordertostabilizetheoutputcurrentoftheamplifiercircuit,()Negativefeedbackshouldbeintroduced.AVoltageBCurrentCSeriesDParallelconnection第13题Inordertoreducetheinputresistanceoftheamplifiercircuit,shouldintroduce()negativefeedback.AVoltageBCurrentCSeriesDParallelconnection第14题Thenegativefeedbackamplifyingcircuitdiagramisshown.ThefeedbacktypeforR3is().AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第15题ABCD第16题ItisknownthattherearefourconfigurationsofACnegativefeedback,inordertoobtainacurrent-voltageconversioncircuit,thefollowingshouldbeintroducedintotheamplifiercircuit.AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第17题Communicationnegativefeedbackrefersto().ANegativefeedbackintroducedintheresistance-capacitancecoupledamplifiercircuitBNegativefeedbackoccursonlywhentheACsignalisamplifiedCNegativefeedbackinthecommunicationchannel第18题Inordertoincreasetheinputresistanceoftheamplifiercircuit,whilestabilizingtheoutputvoltage,shouldbeintroducedinthecircuit()Negativefeedback.AVoltageseriesBCurrentsseriesCVoltageparallelDCurrentsparallel第19题Thenegativefeedbackamplifyingcircuitdiagramisshown.Rffeedbacktypesare().AVoltageseriesBSeriescurrentsCVoltageinseriesDParallelcurrents第20题ItisknownthattherearefourconfigurationsofACnegativefeedback.Toobtainacurrent-currentconversioncircuit,thefollowingshouldbeintroducedintotheamplifiercircuit()AVoltageseriesnegativefeedbackBVoltageparallelnegativefeedbackCCurrentseriesnegativefeedbackDCurrentparallelnegativefeedback第21题FeedbackdepthFisanimportantindicatortomeasurethestrengthoffeedback.Itsvaluedirectlyaffectsthecircuitperformance.Theabovestatementis()AThat'srightBWrongCNotabletotellrightfromwrong.第22题Attheoutputendoftheamplifiercircuit,wherethefeedbacknetworkisconnectedtothebasicamplifier,thefeedbacksignalistakenfromtheoutputvoltagefeedbackontheload.AVoltagefeedbackBParallelfeedbackCCurrentfeedbackDSeriesfeedback第23题Attheoutputendoftheamplifiercircuit,wherethefeedbacknetworkisconnectedtothebasicamplifierinseries,thefeedbacksignalistakenfromtheoutputcurrentfeedbackintheload.AVoltagefeedbackBParallelfeedbackCCurrentfeedbackDSeriesfeedback第24题Attheinputendoftheamplifiercircuit,thefeedbacknetworkisconnectedwiththebasicamplifierinseries,thefeedbacksignalappearsintheformofvoltagev:,andthefeedbackforvoltagecomparisonattheinputendiscalled()

AVoltagefeedbackBParallelfeedbackCCurrentfeedbackDSeriesfeedback第25题Attheinputendoftheamplifiercircuit,thefeedbacknetworkisconnect