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PostPosted: Fri 12:20, 03 Dec 2010    Post subject: moncler outlet 千兆以&#228

千兆以太网高速分接集成电路设计
6100A宽带示波器得到的测试结果表明,在输入摆幅为500mV、输出负载50条件下,输出125Mbit/s数据峰峰值为828mV,抖动有效值为l0ps,眼图占空比为41.5%,输出信号上升沿为9ps,[link widoczny dla zalogowanych],当输入电压为3.3V时功耗仅为161mw,[link widoczny dla zalogowanych]。测试结果中125Mbit/s的“1”信号存在抖动,分析其原因可能为电源电压不“纯”,或在信号输出时耦合了高频信号抖动,将在以后设计中对版图和输出缓冲进一步优化。5结束语本文所介绍的1000BASE.X分接芯片结构通过0.25IxmCMOS工艺验证,实现1路1.25Gbit/s数据和l0路125Mbit/s并行数据间的串/并转换。具有功耗小、集成容易、便于大规模生产的优点,为将来设计更高速率的电路(如万兆以太网分接芯片)奠定了基础。参考文献f1]王志功。光纤通信集成电路设计。北京:高等教育出版社.2003f2]赵文虎,王志功,吴微,等.千兆以太网同步检测集成电路设计。东南大学学报(自然科学版).2002,32(2),161~165l3]FukaishiM,[link widoczny dla zalogowanych],NakamuraK,HeiuchiH,eta1.A2O―GbpsCMOSmuhichanneltransmitterandreceiverchipsetforultra··high·-resolutiondigitaldisplays.IEEEJournalofSolid―StateCir―cuits,2000,35(11):1611~1618l4]FukaishiM,NakamuraK,SatoM,eta1.A4.25GbpsCMOSfiberchanneltransceiverwithasynchronoustree··typedemuhi·-plexerandfrequencyconversionarchitecture.IEEEJournalofSolid―StateCircuits,1998,[link widoczny dla zalogowanych],33(12):2139~2147DesignofHighSpeedDEMUXICinGigabitEthernetShenZhen,ZhuEn,ZhaoWenhu,WangZhigong(SoutheastUniversity,Nanjing,210096,China)【Abstract】BasedontheresearchingofgigabitEthernetdemuhiplexerstructure,ThereceiverchipsusedforGigabitEthernetaredesigned.ThegigabitEthemetreceiverchipsproducedby0.25IxmCMOSprocesshavethefunctionof1:10demuhiplexingandcanoperateat1.25Gbit/S,anditscoreareais470Ixm×320Ixm.Undertheconditionof500mVinputswingand50outputload.thepeak-to-peakvoltageof125Mbit/soutputsignalis828mV,[link widoczny dla zalogowanych],andtherisingtimeis9ps,RMSjitteris10ps.Thepowerconsump-tionisonly161mWwith3.3Vsupplyvoltage.Keywords:gigabitEthernet,DEMUXchip,CMOSprocess·l0·
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