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页数:5页
时间:2019-02-28
《Clock and Data Recovery for a 6 Gbps SerDes Receiver.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、ClockandDataRecoveryfora6GbpsSerDesReceiverJayeshPatilLiliHeMorrisJonesDepartmentofElectricalEngineeringDepartmentofElectricalEngineeringDepartmentofElectricalEngineeringSanJoseStateUniversitySanJoseStateUniversitySanJoseStateUniversitySanJose,USASanJose,USASanJose,USAjayesh147@gmail.comlili_he@sbc
2、global.netmorris.sjsu@comcast.netAbstract—Thispaperpresentsthedesignandimplementationofa6Gbpsclockanddatarecovery(CDR)systemforSerialAdvancedTechnologyAttachment(SATA)standard.TheCDRincorporateshalfratephasedetectorandisrealizedusinga2loopPLLconsistingofacoarseloopandafineloop.Fastfrequencyacquisit
3、ionisacquiredthroughcoarseloopandfinephasealignmentisperformedthroughahalfratefineloop.Figure1.SerDesTransceiverblockdiagramWhilethecoarseloopcanrecoverclockrangingfrom2.5GHzto3.2GHzthefineloophasanacquisitionrangeof200KHz.ThedesignhasbeenimplementedinIBM0.13umCMOSThesenderwhichcanbearouter,CPU,I/O
4、chip,etctechnology.VerilogAMSandMatlabwereusedforfrontendsendsparalleldatatothetransmitter.TheparalleldataisdesignandCadenceforschematicandlayoutimplementation.thenmultiplexed(MUX)bythetransmitterandconvertedtoTheoverallsiliconareaoftheCDRisapproximately108X2aserialdatastream[1].Atthereceiverendthi
5、sserialdatais244umexcludingloopfiltercapacitors.recoveredbyaclockanddatarecoverycircuitpresentintheDeserializerandagaindemultiplexed(DEMUX)intotheKeywords-Clockrecovery,half-rateCDR,SerialATAcommunication,oscillators,phasedetectors,PLLs,Comparatororiginalparalleldatastream.TheMUX-DEMUXperformsthepa
6、ralleltoserialattransmitterandserialtoparallelatreceiverconversion.TheMUX-DEMUXshouldbeI.INTRODUCTIONsynchronizedtosystemclockwhichisahighfrequencyThedemandforhighdatarateandhigherclockclockgeneratedfromaPhaseLockedloop[1].frequencieshasgrownsteadilyoverthepastdecade.CommunicationnetworkssuchasEthe
7、rnet,SONET/SDH,ATM,SATArequirehigherbandwidthandgreaterefficiencytosupportitsgrowingtraffic.Parallelinterconnectsfailedtoservethiseverincreasingbandwidthrequirementmainlyduetothelengthoftheinterconnectwire,
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