标签: phase-shift

Abstract:Thisapplicationbriefdescribeshowtocontrolanalogphaseshiftdigitallyusingacombinationofdigitalpotentiometersandstandardoperationalamplifiers(opamps).Itisintendedtoserveasadesignexampleforengineersneedingtoimplementdigitalphaseshiftinacircuitrywithnospecificapplication.Itpresentscommonopampphaseshiftconfigurationsandhowtoimplementthemusingadigitalpotentiometerinplaceofmechanicalpotentiometersorfixedresistors.Formulasforcalculatingphaseshiftareincludedintheapplicationnote.ApplicationNote184Digitally-ControlledPhaseShiftUsingtheDS1669www.maxim-ic.comCONTROLLINGPHASESHIFTDIGITALLYAlteringthephaseresponseofasignalwithoutchangingitsamplitudecharacteristicsiscommonlyperformedusinganallpassfilter,asinFigure1.TheresponseofthiscircuitisgivenbyAsimplephaseshiftcircuitcanbeimplementedusinganallpassfilter.Figure1AsthesignalfrequencyvariesfromDCtoinfinity,thephaseshiftwillvaryfrom0to+180degrees.YoucanalsoseethatbyvaryingR1,thephaseshiftatagivenfrequ……

摘要：本应用简要介绍了如何控制模拟相移数字使用数字电位器和标准运算放大器（运放）的组合。它的目的是作为一个设计工程师需要实现电路的数字没有具体应用相转移例如。它提出了通用运算放大器相移的配置和如何使用数字电位器代替机械电位器或固定电阻加以实施。相移的计算公式中的应用笔记。ApplicationNote184Digitally-ControlledPhaseShiftUsingtheDS1669www.maxim-ic.comCONTROLLINGPHASESHIFTDIGITALLYAlteringthephaseresponseofasignalwithoutchangingitsamplitudecharacteristicsiscommonlyperformedusinganallpassfilter,asinFigure1.TheresponseofthiscircuitisgivenbyAsimplephaseshiftcircuitcanbeimplementedusinganallpassfilter.Figure1AsthesignalfrequencyvariesfromDCtoinfinity,thephaseshiftwillvaryfrom0to+180degrees.YoucanalsoseethatbyvaryingR1,thephaseshiftatagivenfrequ……