反相比例运算电路制作Productionofinverse

反相比例运算电路制作Productionofinverseproportionaloperationcircuit主讲人：冯钊运算放大器的作用是调节和放大模拟信号，它是用途十分广泛的器件，接入适当的反馈网络，可用作精密的交流和直流放大器、有源滤波器、振荡器及电压比较器。Thefunctionofoperationalamplifiersistoregulateandamplifyanalogsignals.Theyarewidelyuseddevices,connectedtoappropriatefeedbacknetworks,andcanbeusedasprecisionACandDCamplifiers,activefilters,oscillators,andvoltagecomparators.Anoperationalamplifierisnotonlycapableofamplifyingweaksignals,butalsoofperforminginphaseandinverseproportionaloperation,additionandsubtraction,onelectricalsignals,henceitiscalledanoperationalamplifier.运算放大器不但可对微弱信号进行放大，还可对电信号做同相反相比例运算加减法运算，所以被称为运算放大器。反相比例运算电路制作Productionofinverseproportionaloperationcircuit通过反相比例运算电路的制作Theproductionofinverseproportionaloperationcircuits了解集成运算放大器μA741的使用UnderstandingIntegratedOperationalAmplifiersμUseofA741123实验目的实验原理实验器材ExperimentalPurposeExperimentalPrinciplesExperimentalEquipment45实验步骤分析总结ExperimentalProcedureAnalysisSummary目录CONTENTS1实验目的ExperimentalPurposeONE实验目的ExperimentalPurpose1.理解集成运算放大器的工作原理2.掌握集成运算放大器的使用3.能用集成运放构成反相比例运算Understandtheworkingprincipleofintegratedoperationalamplifiers;Mastertheuseofintegratedoperationalamplifiers;Abletouseintegratedoperationalamplifierstoforminverseproportionaloperationalcircuits.2实验原理ExperimentalPrinciplesTWO实验原理ExperimentalPrinciples引脚图

Pindiagram调零端Zeroadjustmentterminal调零端Zeroadjustmentterminal反相输入端InvertingInput同相输入端non-invertinginput负电源端Negativepowerterminal正电源端Positivepowerterminal输出端Outputterminal空脚Emptyfoot理想运放工作在线性区的两个特点TwoCharacteristicsofIdealOperationalAmplifiersWorkingintheLinearRegion1）u+≈u-（虚短）Virtualshortness2）i+≈i-≈0（虚断）virtualopen实验原理ExperimentalPrinciples3实验器材ExperimentalEquipmentTHREE实验器材ExperimentalEquipment示波器oscilloscope天煌电子实验台TianhuangElectronicExperimentalPlatform万用表multimeterUA741电阻器resistor导线wire4实验步骤ExperimentalStepsFOUR实验步骤ExperimentalStepsStep1:Connectthecircuitandturnonthepowersupply步骤1：连接电路接通电源实验步骤ExperimentalStepsStep2:Zeroadjustmentoperation

步骤2：连调零操作实验步骤ExperimentalStepsStep3:Adjusttheinputvoltageandmeasuretheoutputvoltagevalue步骤3：调整输入电压，测输出电压值调整输入电压，测输出电压值Adjusttheinputvoltageandmeasuretheoutputvoltagevalue

根据反相比例运算理论知识输出电压Uo=-(Rf/Rl*Ul），带入实验用的电阻值可得出本次实验理论放大结果为Uo=-10Ul，把计算的理论值记入表格，注意观察测量值和理论值。Basedonthetheoreticalknowledgeofinverseproportionaloperation,theoutputvoltageUo=-(Rf/Rl*Ul)canbeobtainedbyintroducingtheresistancevalueusedintheexperiment.ThetheoreticalamplificationresultofthisexperimentisUo=-10Ul.Recordthecalculatedtheoreticalvalueinthetable,andpayattentiontoobservingthemeasuredandtheoreticalvalues.MeasurementvalueTheoreticalvalue实验步骤ExperimentalStepsStep4:Communicationdetection步骤4：交流检测交流检测Communicationdetection

用交流毫伏表测量输出电压并记入表中。依此再测输入信号为0.5V时的输出电压信号。同样根据Uo=-10Ul把计算的理论值记入表格。MeasuretheoutputvoltagewithanACmillivoltmeterandrecorditinthetable.Basedonthis,measuretheoutputvoltagesignalwhentheinputsignalis0.5V.Similarly,recordthecalculatedtheoreticalvaluesinthetablebasedonUo=-10Ul.PhaseinversionproportionaloperationMeasurementvalueTheoreticalvalue实验步骤ExperimentalStepsStep5:ObservethewaveformoftheACsignal步骤5：观察交流信号波形5分析总结AnalysisandSummaryFIVE分析总结AnalysisandSummary实验结果与理论值基本符合Theexperimentalresultsarebasicallyconsistentwiththetheoreticalvalues741可以实现对直流信号的反相比例运算741canachieveinverseproportionaloperationofDCsignals741可以实现对交流信号的反相比例运算741canachieveinverseproportionaloperationofACsignals选择不同的阻值比会有不同的比例系数Choosingdifferentresistanceratioswillresultindifferentproportionalc