英文版本模拟有源滤波器matlab实现

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1、DesignandrelizationofanlogactivefilterbasedonMATLABSchoolofautomation,ChongqinguniversityEmail:sdu@sdu.edu.cnABSTRACTThispaperdescribesthebasicconceptsoffiltersintroducedanalogactivefilterdesignprinciplesandapproximationtheory.IncludingButterworthapproximation,ChebyshevtypeIapproximatio

2、n,ChebyshevⅡtypeapproximation,ellipticfunctionapproximationandBezierapproximation.Thefirstauthorstudiedtheanalogactivefilterdesignprocessandperformancetesting.矚慫润厲钐瘗睞枥庑赖。Combinesthetraditionalhardwaredesignmethodsandsoftwareprogrammingtechniques，theMATLABsimulationofavarietyoffilterappr

3、oximationtechniqueofamplitude-frequencycharacteristiccurveandanillustrativeexample.Butterworthfilterinstanceonsimulationstudies,bytheprogramtoquicklygettheminimumorderandthecutofffrequency,replacingthetraditionalcomplexcalculations;convenientlyachievedbytheanaloglow-passfiltertothehigh-

4、pass,low-passandband-stopfiltertheconversion;complexonquadopampcircuitdesignsimulation,throughitsdifferentpointsstrikeoutputtransferfunctiontosimulatethesecond-orderlow-pass,highpass,bandpassandband-stopfilterfrequencycharacteristiccurveandgetbettersimulationresults.聞創沟燴鐺險爱氇谴净。Keywords:

5、AnalogandActiveFilter;TheoryofApproximation,Amplitude-frequencycharacteristics，MATLABprogramdesign残骛楼諍锩瀨濟溆塹籟。I、INTRODUCTION1、Researchbackground酽锕极額閉镇桧猪訣锥。Filteringisabasicandimportanttechnologyinsignalprocessing,usingfilterwecanextractthedesiredsignalandsuppressunwantedparts. Theso-call

6、edfilterisacertainsignalprocessingmeansthatwithtransmissioncharacteristics. Accordingtothedifferentprocessedsignaloffilter,thefiltercanbedividedintotwotypes:analoganddigitalfilters. Analogfilterisacommonconversiondeviceinthetestsystemoradedicatedinstrumentation. Forexample:aband-passfil

7、terforspectrumanalyzerfrequencyselectiondevice;low-passfilterfordigitalsignalanalysissystemintheanti-aliasingfilterfrequency;high-passfilterisusedforacousticemissiondetectortoexcludelow-frequencyinterferencenoise;bandstop filterisusedineddycurrentvibrometernotchfilter,andsoon.