noise-shaping-sigma-delta

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1、NoiseShapingSigmaDeltaDACsOctober2011AMMESS10/11OverviewofthisPresentation•AboutESSTechnology•SimpleNoiseShaping•The“magic”step...•ΣΔModulators•BeyondtheΣΔmodulator–ΣΔartifactsandunderstandingwhatAudiophilesarehearing–WhattheESSHyperStreamdoesdifferentlyΣΔ/HyperStream2of44Cor

2、porateOverview•ESSwasfoundedin1984–Fablesssemiconductorsupplier–Marketisconsumerdigitalentertainment–HeadquarteredinSiliconValleywithworldwidebranches•ESShasalonghistoryofbeingthemarketleader–1989#1supplier:Soundchipsfortoyindustry–1995-1999#1supplier:PCAudiochips–1998-2005#1

3、supplier:Digitalvideochips–2008SabreDAC:HighestPerformanceAudioDAC–2011SabreADC:HighestPerformanceAudioADCΣΔ/HyperStream3of44WhatwemakeatESS•Sound-barChips–YoumayalreadyhaveaHyperStreammodulatorinyourhome:WemakethechipsusedinmanySound-barstoday.•HomeTheaterChips–Ifyoupurchase

4、daHomeTheater(orDVDplayer)youprobablyhaveaHyperStreammodulatorinyourhome.ESSchipswereinabout30%ofallDVDplayers,andinmanyHomeTheatersystemstoday.•HighPerformanceDAC–TheSabreproductlineofhighestperformanceDACs(andlatelyADCs)areinmanyhigh-endsystems.ΣΔ/HyperStream4of44ESSLocatio

5、nsΣΔ/HyperStream5of44OverviewofthisPresentation•AboutESSTechnology•SimpleNoiseShaping•The“magic”step...•ΣΔModulators•BeyondtheΣΔmodulator–ΣΔartifactsandunderstandingwhatAudiophilesarehearing–WhattheESSHyperStreamdoesdifferentlyΣΔ/HyperStream6of44WhatisthepriceofGas?(1)•Appare

6、ntly,itis121.9centsBeforeyoustartcrossingthebordertoCanadatobuygas,thisisperlitrenotpergallon!ΣΔ/HyperStream7of44WhatisthepriceofGas?(2)1Mon$1.222Tue$1.223Wed$1.224Thu$1.225Fri$1.22•Buyonelitreperdayforafew6Sat$1.22days.Whatdoyouhavetopay?7Sun$1.228Mon$1.22•Becausethat0.9isle

7、ssthanone9Tue$1.22cent,thecashiermustcharge10Wed$1.22youthenearestpossibleprice:11Thu$1.2212Fri$1.22$1.2213Sat$1.22•Hadyounotseenthesign,you14Sun$1.22wouldconcludethattheprice,15Mon$1.2216Tue$1.22basedonbuyinggas20times,17Wed$1.22was$1.2218Thu$1.2219Fri$1.2220Sat$1.22ΣΔ/Hyper

8、Stream8of44WhatisthepriceofGas?(3)1Mon$1.22•What'shappeninghere?2Tue