简介:<正>《电子产品世界》2004年8月报道:世界主要半导体厂商的生产领域已可应用90nm工艺技术,为确保技术优势,已把竞争推向65~70nm级工艺,计划2005年推向量产阶段。Intel去年已采用65nm工艺试制或SRAM产品,计划2005年后投入批量生产。东芝和索尼联手开发出65nmLSI,年初已生产出试制品,2008年上半年跨入大批量生产。三星已开发70nm工艺,计划年末在30nm生产线上量产4GbNAND内存。台积电决定2005年前采用65nm技术开发出SoC平台。采用65nm工艺生产芯片,可使芯片上集成的晶体管数翻一番,性能提高,成本下降。因此,后起半导体企业年底前也须进入90nm以下的超微细加工领域,也是今后存活半导体市场的一大关键。
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简介:ThetheoreticalSpectralresponseformulaoftheN^+-N-I-P^+siliconphotodetectorwithhigh/lowemissionjunctionisgiven.Atthesametime,consideringtheprocessrequirements,theoptimunstructureparametersofsiliconphotodetectorareobtainedbynumericalcalculationandsimulation.Undertheconditionoftheseoptimumstructureparameters,theresponsivityofthesiliconphotodetectorwillbe0.48A/Wat650nm.
简介:Themixedl1/H2optimizationproblemforMIMO(multipleinput-multipleoutput)discrete-timesystemsisconsidered.Thisproblemisformulatedasminimizingthel1-normofaclosed-looptransfermatrixwhilemaintainingtheH2-normofanotherclosed-looptransfermatrixatprescribedlevel.ThecontinuitypropertyoftheoptimalvalueinrespecttochangesintheH2-normconstraintisstudied.Theexistenceoftheoptimalsolutionsofmixedll/H2problemisproved.Becausethesolutionofthemixedl1/H2problemisbasedonthescaled-Qmethod,itavoidsthezerointerpolationdifficulties.Theconvergentupperandlowerboundscanbeobtainedbysolvingasequenceoffinitedimensionalnonlinearprogrammingforwhichmanyefficientnumericaloptimizationalgorithmsexist.
简介:HandoverinDigitalVideoBroadcastingforHandhelds(DVB-H)aimstoprovidecontinuousmobilebroadcastingserviceswhenauseristravelingthroughcellboundaries.Agoodhandovercontrolcanimprovethepowerefficiencyandgainmuchbetterreceptionquality.ThisletterprovidesanovelapproachforDVB-HhandoverbasedonDVB-H/UniversalMobileTelecommunicationsSystem(UMTS)hybridnetwork,whichmovesthemainhandoverfunctionfromtheterminalstothenetworks,sothatitreducestheoperationcomplexityoftheterminalsandincreasesthepowersaving.WhentheterminalcannotreceivetheDVB-Hsignalinthetransmissionshadowareasorbecauseofsomeotherreasons,theUMTSnetworksmayofferthesameservicetouserstomaketheservicecontinuous.AstheUMTSnetworkshavethetopologyoftheDVB-Hnetworks,bycommunicatingwiththeterminals,theUMTSnetworkscanhelptheterminalstopredictthehandover,andavoidunnecessaryhandover.
简介:Inthispaper,wedemonstratetheacetylehe(C2H2)sensorwithhighsensitivityusingahollow-corephotonicbandgapfiber(HC-PCF).ExperimentsformeasuringC2H2concentrationsingasmixtureareperformed.Usinga2m-longHC-PCFasgascell,thespectrumofacetyleneatn1+n3bandhasbeenmeasured,andtheP11-branchhasbeenselectedforthepurposeofsensing.Aminimumdetectivityof143partspermillionbyvolume(ppmv)forthesystemconfigurationisestimated.