一种应用于闭环D类放大器结构的ADC-豆柴文库

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一种应用于闭环D类放大器结构的ADC
Introduction:
TheClosed-LoopDClassAmplifierisaverypopulartypeofaudioamplifier.ItconsistsofaClassDamplifier,alow-passfilter,andafeedbackcircuit.TheADC(AnalogtoDigitalConverter)isanimportantcomponentinthefeedbackcircuit.TheroleoftheADCistoconverttheoutputoftheamplifierintodigitalformforfurtherprocessing.ThispaperdiscussesthedesignofanADCforuseinaClosed-LoopDClassAmplifier.
Designconsideration:
ThedesignofanADCforuseinaClosed-LoopDClassAmplifierinvolvesseveralconsiderations.Themostimportantamongtheseistheresolutionoftheconverter.TheresolutionofanADCdeterminestheaccuracyoftheconversion.Ahigherresolutionwillresultinamoreaccurateconversion,butitwillalsoincreasethecostandcomplexityoftheconverter.TheresolutionoftheADCshouldbechosenbasedontheaccuracyrequiredfortheapplicationandtheavailableresources.
AnotherconsiderationinthedesignoftheADCisthesamplingrate.Thesamplingrateistherateatwhichtheoutputoftheamplifierissampledandconvertedtodigitalform.Thesamplingrateshouldbechosenbasedonthebandwidthoftheamplifierandtherequiredaccuracyoftheconversion.Ahighersamplingratewillallowforamoreaccurateconversion,butitwillalsoincreasethecomplexityandcostoftheconverter.
Inadditiontotheresolutionandsamplingrate,thedesignoftheADCmustalsoconsiderthenoiseanddistortionoftheconverter.Thenoiseanddistortionoftheconvertercanintroduceerrorsintotheconversion,whichcandegradetheperformanceoftheamplifier.
Overall,thedesignofanADCforuseinaClosed-LoopDClassAmplifierrequiresabalancebetweenresolution,samplingrate,noise,anddistortion.Thedesignshouldbeoptimizedforthespecificapplication,takingintoaccounttheavailableresourcesandperformancerequirements.
ADCDesign:
TheADCusedforthisprojectisadual-channel,16-bitADCwithasamplingrateof48kHz.TheADCisdesignedtooperateinaClosed-LoopDClassAmplifierwithabandwidthof20kHz.
TheADCusesadelta-sigmamodulationtechniquefortheconversion.Delta-sigmamodulationisatechniquethatusesoversamplingandnoise-shapingtoachievehighresolutionandlowdistortion.Theoversamplingandnois