Differential Gain and Phase—Why Measure It, if You Cannot See It?

Abstract:Differentialgainandphase(DGandDP)arecommonvideospecifications.Whatarethey?Whyaretheyusediftheycannotbeseen?Thisapplicationnoteanswersthesequestions,andexplainshowthesespecificationsareappliedtoothernonvideoamplifiers,ADCs,andDACs.Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4294Maxim>Designsupport>Appnotes>AutomaticTestEquipment(ATE)>APP4294Maxim>Designsupport>Appnotes>Automotive>APP4294Keywords:DG,DP,differentialgainphase,videoerror,NTSC,TV,invisibleamplifier,PAL,subcarrier,ADC,DAC,sweet-spot,linear,linearity,Sallen-Key,filter,video,quality,signalintegrityMay23,2011APPLICATIONNOTE4294DifferentialGainandPhase―WhyMeasureIt,ifYouCannotSeeIt?By:BillLaumeister,StrategicApplicationsEngineerAbstract:Differentialgainandphase(DGandDP)arecommonvideospecifications.Whatarethey?Why