FilterPro™ User's Guide - Texas Instruments
User's GuideSBFA001C June1991 RevisedFebruary2011FilterPro User's , designedtoaidinthedesignofactivefiltersi mplementedwiththemultiplefeedback(MFB) ' (Four-Pole), (Five-Pole),3dBRippleChebyshevFilterShow ingCutoffat (Unity-Gain,First-OrderButterworth;f 3dB= 1/2 R1 C1)..................................... ... (Gain= R2/R1).................................. ..................................1013Sa llen-KeyComplexPole-PairSection,Unity-Ga in(Gain= 1)...................................... ...............1014Sallen-KeyComplexPole -PairSection(Gain= 1 + R4/R3).................................. ........................ a ,Windows, June1991 RevisedFebruary2011FilterPro User's GuideSubmitDocumentationFeedback 1991 2011, , DesignReportThroughthePrinterIconin ,Chebyshev,andBesselUnity-GainMFBLow-Pas sFilters, ,Chebyshev,andBesselUnity-GainMFBLow-Pas sFilters, , , , User's GuideSBFA001C June1991 RevisedFebruary2011SubmitDocumentationFe edback 1991 2011,TexasInstrumentsIncorporatedStop bandIdealresponsebrick wallf definesLP applicationswherea specificamplitudeversusfrequencybehavior isrequiredfroma specificphaseshift,ortimedelay,needstobe incorporatedin a circuitanda filtermaybeusedin
Stop band Stop band Bandwidth Ideal responsebrick wall f cutoff frequency L f cutoff frequency H Bandwidth = (f - )H fL Passband www.ti.com Filter Type Definitions 1.3 Bandpass Filters The bandpass filter has a passband that allows a select band of frequencies that fall within the passband
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