Analogfilterscanbefoundinalmosteveryelectroniccircuit.
Audiosystemsusethemforpreamplificationandequalization.
Incommunicationsystems,filtersareusedfortuningspecific
frequenciesandeliminatingothers.Butifananalogsignalis
digitized,low-passfiltersarealwaysusedtopreventaliasing
errorsfromout-of-bandnoiseandinterference.SelecttheRightOperationalAmplifierforyourFilteringCircuitsByBonnieC.Baker,MicrochipTechnologyInc.ANALOGDESIGNNOTEADN003IntroductionAnalogfilterscanbefoundinalmosteveryelectroniccircuit.Audiosystemsusethemforpreamplificationandequalization.Incommunicationsystems,filtersareusedfortuningspecificR3frequenciesandeliminatingothers.Butifananalogsignalisdigitized,low-passfiltersarealwaysusedtopreventaliasingC1errorsfromout-of-bandnoiseandinterference.R1R2
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