資源描述：
《Photonic analog-to-digital converters A tutorial》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在學術論文-天天文庫。
1、OMI1.pdf?2009OSA/OFC/NFOEC2009PhotonicAnalog-to-DigitalConvertersATutorialGeorgeC.ValleyElectronicsandPhotonicsLaboratoryTheAerospaceCorporationgeorgevalley@aeroorggeorge.valley@aero.org310-336-0336978-1-55752-865-0/09/$25.00?2009IEEEAcknowledgementsCoworkersTheAerospppaceCorp:Jason
2、Chou,JoshConwaygy,GeorgeSefler,BobWaldenUniversityofCalifornia:LosAngeles:ShalabhGupta,BahramJalaliPhotonicSystemsInc.:GaryBettsThisworkwassupportedunderTheAerospaceCorporation'sIndependentResearchandDevelopmentProgramandundersubcontracttotheUniversityofCalifornia,LosAngelesaspartof
3、DARPAContractNo.N66001-07-1-2007george.valley@aero.orgOutline?WhatisaphotonicADC??ElectronicADCbasics—samplingandquantization?SfStateoftheart:–ADCs–Interleaveddigitizers–Digitaloscilloscopes?ClassesofphotonicADCs:Photonic-–Assisted–Sampled–Quantized–Delta-sigmamodulator?Microwavepho
4、toniclinksinphotonicADCs?ExamplesofphotonicADCs?Recentresultstime-stretchADCs–10Terasample/secondtransientdigitizer–7-ENOB10GHz2-channelADC–150Gigasample/secondcontinuoustimedigitizer?Summarygeorge.valley@aero.orgWhatisaphotonicanalog-to-digitalconverter??Opticalsignal–Inputanalogop
5、ticalsignalInputanalogopticalsignal–OutputdigitalopticalsignalRelativelylittleworkhereMostanalogopticalsignalsareincoherentlightMostanalogopticalsignalsareincoherentlight?RFsignal–InputanalogelectronicsignalInputanalogelectronicsignal–Dosomethingtoelectronicsignalusingphotonics–Outp
6、utdigitalelectronicsignalMostphotonicADCworkishereMostphotonicADCworkisheregeorge.valley@aero.orgSamplingrateandnumberofbits?Familiarquantities–SamplingrateSamplingrate—egCD441kHzorkilosample/sec(kS/s)e.g.CD44.1kHzorkilosample/sec(kS/s)–Numberofread-outbits(statedbits)—CD16bits?More
7、usefulcharacterizationsofADCperformance–InputbandwidthInputbandwidth—egCD20Hzto20kHze.g.CD20Hzto20kHz?Nyquistsamplingtheoremsayssamplingratemustbe>2xbandwidth?ADCnoisebandwidthADCnoisebandwidth=inputbandwidthinputbandwidth–Effectivenumberofbits(ENOB)?DependsonSignal-to-Noise-and-Dis
8、tortionRatio(SNDR)?
