EPOT应用：偏移调整的运算放大器电路

摘要：在一些电子系统，将有助于在输入电压直流偏置输出一个重要的错误。在高增益配置，这是特别真实。偏移调整电路，可添加到“空”出来的偏移电压，高增益的阶段，甚至与实际运放电路中重要的输入失调电压。

Maxim>AppNotes>AmplifierandComparatorCircuitsDigitalPotentiometersKeywords:offsetadjust,offsetadjustment,opamp,nullingcircuits,nullingopamps,DCoffsetvoltage,Sep17,2001opampsAPPLICATIONNOTE803EPOTApplications:OffsetAdjustmentinOp-AmpCircuitsAbstract:Insomeelectronicsystems,aDCoffsetvoltageattheinputswillcontributeasignificanterrortotheoutput.Thisisespeciallytrueinhighgainconfigurations.Anoffsetadjustmentcircuitcanbeaddedto"null"outtheoffsetvoltage,makinghighgainstagespracticalevenwithsignificantinputoffsetvoltagesfoundinopampcircuits.ElectronicPotentiometers(EPOTS)offerdesignerstheopportunitytocontrolaresistanceviaadigitalinterfaceandcanbeusedinplaceofmechanical