标签: 特设

施密特设计CMOSSchmittTrigger―AUniquelyVersatileDesignComponentCMOSSchmittTrigger―AUniquelyVersatileDesignComponentINTRODUCTIONTheSchmitttriggerhasfoundmanyapplicationsinnumerouscircuits,bothanaloganddigital.TheversatilityofaTTLSchmittishamperedbyitsnarrowsupplyrange,limitedinterfacecapability,lowinputimpedanceandunbalancedoutputcharacteristics.TheSchmitttriggercouldbebuiltfromdiscretedevicestosatisfyaparticularparameter,butthisisacarefulandsometimestime-consumingdesign.TheCMOSSchmitttrigger,whichcomessixtoapackage,usesCMOScharacteristicstooptimizedesignandadvanceintoareaswhereTTLcouldnotgo.Theseareasinclude:interfacingwithopampsandtransmissionlines,whichoperatefromlargesplitsupplies,l……