18 bit Sigma Delta DAC的設(shè)計的綜述報告_第1頁
18 bit Sigma Delta DAC的設(shè)計的綜述報告_第2頁
18 bit Sigma Delta DAC的設(shè)計的綜述報告_第3頁
全文預(yù)覽已結(jié)束

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請進行舉報或認(rèn)領(lǐng)

文檔簡介

18bitSigmaDeltaDAC的設(shè)計的綜述報告

OverviewoftheDesignofan18-bitSigmaDeltaDAC

ASigmaDeltaDAC(DigitaltoAnalogConverter)isatypeofdigitaltoanalogconverterthatusesSigmaDeltamodulationtechniquetoconvertdigitalsignalintoananalogsignal.SigmaDeltaDACsarecommonlyusedinaudioequipment,suchasCDplayers,digitalaudiobroadcastingsystems,andportablemusicplayers.

Thedesignofan18-bitSigmaDeltaDACinvolvesseveralkeycomponents,includingthedigitalfilter,theSigmaDeltamodulator,andtheDACoutputstage.

TheDigitalFilter

ThedigitalfilterisacriticalcomponentoftheSigmaDeltaDAC.ItisresponsibleforreducingquantizationnoiseandshapingtheDACoutputfrequencyresponse.ThefilteristypicallyimplementedusingFiniteImpulseResponse(FIR)orInfiniteImpulseResponse(IIR)filterstructures.

TheSigmaDeltaModulator

TheSigmaDeltamodulatorisakeycomponentoftheSigmaDeltaDAC.Itisresponsibleforconvertingthedigitalinputsignalintoahighbitrate,highfrequency,lowamplitudeSigmaDeltabitstream.TheSigmaDeltamodulatoristypicallyimplementedusingafeedbackloopthatincludesaquantizer,adigitalfilter,andafeedbackpath.

TheDACOutputStage

TheDACoutputstageisresponsibleforconvertingthehigh-frequency,low-amplitudeSigmaDeltabitstreamintoalow-frequency,high-amplitudeanalogsignal.Theoutputstagetypicallyincludesaninterpolationfilter,acurrent-steeringDAC,andanoperationalamplifier.

DesignConsiderations

Thedesignofan18-bitSigmaDeltaDACinvolvesseveralkeyconsiderations.Theseincludetheselectionofthedigitalfilterstructure,thedesignoftheSigmaDeltamodulatorfeedbackloop,andtheselectionoftheDACoutputstagecomponents.

Theselectionofthedigitalfilterstructureiscriticaltoachievingthedesiredfrequencyresponseandreducingquantizationnoise.FIRfiltersaregenerallypreferredfortheirlinearphaseresponseandabilitytoprovideaccuratedelaycompensation.IIRfiltersaregenerallypreferredfortheirefficientimplementationandabilitytoprovidehigh-frequencyresponse.

ThedesignoftheSigmaDeltamodulatorfeedbackloopiscriticaltoachievingthedesiredresolutionandnoiseperformance.Thefeedbackloopmustbecarefullyoptimizedtoprovidethehighestpossibleresolutionandthelowestpossiblenoise.Thisofteninvolvestheuseofoversampling,noiseshaping,andothertechniques.

TheselectionoftheDACoutputstagecomponentsiscriticaltoachievingthedesiredoutputvoltagerangeandaccuracy.Theinterpolationfiltermustbecarefullydesignedtoprovidethedesiredoutputfrequencyresponse,whilethecurrent-steeringDACmustbecarefullydesignedtoprovidethedesiredoutputvoltagerangeandlinearity.Finally,theoperationalamplifiermustbecarefullyselectedtoprovidethedesiredoutputvoltageswingandstability.

Conclusion

Thedesignofan18-bitSigmaDeltaDACinvolvesseveralkeycomponents,includingthedigitalfilter,theSigmaDeltamodulator,andtheDACoutputstage.Thedesignmustcarefullybalancetherequirementsforfrequencyresponse,resolution,noiseperformance,outputvoltagerange,andlin

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫網(wǎng)僅提供信息存儲空間，僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護處理，對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論