简介:Thispaperproposesathermalanalyticalmodelofcurrentgainforbipolarjunctiontransistor-bipolarstaticinductiontransistor(BJT-BSIT)compounddeviceinthelowcurrentoperation.Italsoproposesabestthermalcompensatingfactortothecompounddevicethatindicatestherelationshipbetweenthethermalvariationrateofcurrentgainanddevicestructure.Thisisimportantforthedesignofcompounddevicetobeoptimized.Finally,theanalyticalmodelisfoundtobeingoodagreementwithnumericalsimulationandexperimentalresults.Thetestresultsdemonstratethatthermalvariationrateofcurrentgainisbelow10%in25℃-85℃and20%in55℃-25℃.
简介:Anovelburningtechniqueformakingasemiconductingsingle-walledcarbonnanotubes(SWNTs)transistorassembledbythedielectrophoreticforcewassuggested.Thefabricationprocessconsistedoftwosteps.First,toalignandattachabundleofSWNTsbetweenthesourceanddrain,thealternating(AC)voltagewasappliedtotheelectrodes.WhenabundleofSWNTswasconnectedbetweentwoelectrodes,someofmetallicnanotubesandsemi-conducingnanotubesexistedtogether.ThesecondstepistoburnthemetallicSWNTSbyapplyingthevoltagebetweentwoelectrodes.Withincreasingthevoltage,morecurrentflowedthroughthemetallicSWNTs,thus,themetallicSWNTsburntearlierthanthesemiconductingone.Thistechniqueenablestoobtainonlysemi-conductingSWNTsconnectioninthetransistor.ThroughtheI—Vcharacteristicgraph,themomentofmetallicSWNTsburningandthecharacteristicofsemi-conducingnanotubeswereverified.
简介:Theprincipleofthetwocarrierscontributingtocarrythepixelsignalchargesisfirstlypresented,andthenthebipolarjunctionphotogatetransistor(BJPT)withhighperformanceisproposedfortheCMOSimagesensor.Thenumericalanalyticalmodelofthephoto-chargetransferforthebipolarjunctionphotogateisestablishedindetail.Somenumericalsimulationsareobtainedunder0.6μmCMOSprocess,whichshowthatitsreadoutrateincreasesexponentiallywiththeincreaseofthephoto-chargeatappliedvoltage.
简介:Inthiswork,wereportabroadbandterahertzwavemodulatorbasedonatop-gategraphenefieldeffecttransistorwithpolyimideasthegatedielectriconaPETsubstrate.ThetransmissionoftheterahertzwaveismodulatedbycontrollingtheFermilevelofgrapheneviathepolyimideasthetop-gatedielectricmaterialinsteadofthetraditionaldielectricmaterials.Itisfoundthattheterahertzmodulatorcanachieveamodulationdepthof~20.9%withasmalloperatinggatevoltageof3.5Vandalowinsertionlossof2.1dB.
简介:由地可配置的nanogranularSiO2的基于的离子/电子的混合synaptic晶体管gated拍摄的indium–zinc-oxide(IZO)被报导。设备展出了上面的高当前的开/关比率107,∼14cm2V−1s−1和∼80mV/decade的一个低次于最低限度的秋千。门偏爱将在隧道/电介质接口调制在质子和电子之间的相互影响。由于在nanogranularSiO2电影以内的短暂质子流动的动态调整,隧道电流将动态地被修改。短期的synaptic粘性例如短期的potentiation和短期的消沉,在建议IZOsynaptic晶体管上被模仿。结果显示这里建议的synaptic晶体管在未来neuromorphic设备有潜在的应用。