简介:Anultra-highspeed1:2demultiplexerforopticalfibercommunicationsystemsisdesignedutilizingtheIHP0.25μmSiGeBiCMOStechnology.Thelatchofthedemultiplexercorecircuitisresearched.Basedonthecurrentmeasurementcondition,ahigh-gainandwide-bandwidthclockbufferisdesignedtodrivelargeload.Transmissionlinetheoryforultra-highspeedcircuitsisusedtodesignmatchingnetworktosolvethematchingproblemamongtheinput,outputandinternalsignals.Thetransientanalysisshowsthatthisdemultiplexercandemultiplexone100Gb/sinputintotwo50Gb/soutputs.Thechipareaofitis0.7mm×0.47mm,theinputandoutputdataarebothat400mVP-PPCMLstandardvoltagelevel,andthepowerconsumptionoftheICis900mWatthepowersupplyof-4V.
简介:ThispaperpresentsacomparisonbetweentheChineseCodeGB50011-2001andtheInternationalStandardISO3010:2001(E),emphasizingthesimilaritiesanddifferencesrelatedtodesignrequirements,seismicactionsandanalyticalapproaches.Similaritiesinclude:earthquakereturnperiod,conceptualdesign,siteclassification,structuralstrengthandductilityrequirements,deformationlimits,responsespectra,seismicanalysisprocedures,isolationandenergydissipation,andnonstructuralelements.Differencesexistinthefollowingareas:seismiclevels,earthquakeloading,modedampingfactorsandstructuralcontrol.