标签: iir数字滤波

ThisapplicationnotedescribestheimplementationofvariousdigitalfiltersusingthePIC17C42,thefirstmemberofMicrochip’s2ndgenerationof8-bitmicrocontrollers.ThePIC17C42isaveryhighspeed8-bitmicrocontrollerwithaninstructioncycletimeof250ns(@16MHzinputclock).EventhoughthePIC17C42isan8-bitdevice,it’shighspeedandeffi-cientinstructionsetallowsimplementationofdigitalfil-tersforpracticalapplications.TraditionallydigitalfiltershavebeenimplementedusingexpensiveDigitalSignalProcessors(DSPs).InasystemtheDSPisnormallyaslaveprocessorbeingcontrolledbyeitheran8-bitor16-bitmicrocontroller.Wheresamplingratesarenothigh(especiallyinmechanicalcontrolsystems),asin-glechipsolutionispossibleusingthePIC17C42.AN540ImplementingIIRDigitalFiltersTHEORYOFOPERATIONAuthor:AmarPalacherlaMicrochipTechnologyInc.DigitalltersinmostcasesassumethefollowingformofrelationshipbetweentheoutputandinputINTRODUCTIONsequences.ThisapplicationnotedescribestheimplementationofvariousdigitalltersusingthePIC17C42,therstmemberofMicrochip’s2ndgenerationof8-bit……