固定增益运算放大器简化滤波器设计

摘要：使用设计的Sallen-Key滤波器时，元件数量少，金钱，和电路板空间。简化与带通滤波器固定增益amplfiers的。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:lowpassfilters,highpassfilters,filterdesigns,opampsasfilters,Sallen-KeyfilterJan22,2001APPLICATIONNOTE700Fixed-GainOpAmpsSimplifyFilterDesignAbstract:Uselesscomponentcount,money,andboardspacewhendesigningSallen-Keyfilters.Simplifybandpassfilterswithfixedgainamplfiers.Simplesecond-orderfiltersmeetmanyfilteringrequirements.Alow-orderlow-passfilter,forexample,isoftenadequateforantialiasinginADCapplicationsorforeliminatinghigh-frequencynoiseinaudioapplications.Similarly,alow-orderhigh-passfiltercaneasilyremovepower-supplynoise.Whenyoudesignsuchfilterswithbuilt-ingain,fixed-gainopampscansavespace,cost,andtime.Figur