标签: 特触
相关资源
-
施密特触发器详解Tri-StateLogicandSchmittTriggersUniversityofConnecticut1Tri-StateLogicnnnThreeStates:High,Low,HighZ(highimpedance,ordisabled)Tri-stategatesmaybeconstructedusingtransmissiongates,orbyinternalmodificationsto2-stategates.Tri-stategatesarerequiredforbus-basedarchitectures:PPIAROMn-bitdatabusRAMRAMRAMManydevicesareconnectedinparallelonthebus,butonlyonedevicecanattempttodrivethebusatonetime.UniversityofConnecticut2Tri-StateTTLNAND2GateVCCENABLE=HIGH.RPRBRCQPAQIBENABLEDSDIADIBDENQSDOOUTENABLE=LOW.QORDIfthecontrolinputisinverted,itiscalledan“INHIBIT”input.UniversityofConnecticut3Tri-StateCMOSGateVDDENABLE=HIGH.MPIMPEMNIMPOINMNOOU……
