EPOT应用：在运算放大器电路的增益调整

可变增益放大器通常使用机械电位器来设置增益。一个例子是一个音量控制旋钮。然而，当模拟信号路径数字控制，数字电位器可能被用来控制增益。本文讨论了数字电位器的使用，形成数字控制增益或过滤块。

Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSDIGITALPOTENTIOMETERSKeywords:EPOTApplications:GainAdjustmentinOp-AmpCircuitsNov28,2001APPLICATIONNOTE864EPOTApplications:GainAdjustmentinOp-AmpCircuitsVariablegainamplifiersoftenuseamechanicalpotentiometertosetthegain.Anexampleisavolumecontroldial.However,whentheanalogsignalpathisdigitallycontrolled,adigitalpotentiometermightbeusedtocontrolgain.Thisarticlediscussestheuseofthedigitalpotentiometertoformdigitallycontrolledgainorfilterblocks.GeneralThroughoutthisdiscussionofdigitalpotentiometers,thetermEPOTisusedratherthandigitalpot,EEPOTorEPOT.ThetermEPOTdescribestheMaximseriesofvola