最大限度地减少组件的变化敏感性的单运放滤波器

摘要：通过钻研Sallen-Key滤波器的元件灵敏度更深入一点，我们发现在数学分析“甜蜜点”，使简单的，单一的运算放大器，过滤器，其性能的竞争对手，更复杂的过滤器，设计。在延长的Sallen-Key滤波器的效用，这种做法是有益的。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSFILTERCIRCUITS(ANALOG)Keywords:opampfilters,Sallen-Keyfilters,highpassfilter,opamps,singleopampMar21,2001APPLICATIONNOTE738MinimizingComponent-VariationSensitivityinSingleOpAmpFiltersAbstract:BydelvingalittlemoredeeplyintotheSallen-Keyfilter'scomponentsensitivities,wediscovera"sweetspot"inthemathematicalanalysisthatallowsthedesignofsimple,singleopampfilterswhoseperformancerivalsthatofmorecomplicatedfilters.ThisapproachhasbeenusefulinextendingtheutilityofSallen-Keyfilters.Dozensoffiltertopologieshavebeendevisedovertheyears,eachwithitsownadvantages.Yetengineersoftenrelyonasmallbutpopular