数电第三章逻辑门(logic-gatas)原版英文教材辅助课件

CH3LOGICGATESLogicaloperation2.Application3.Troubleshootingoflogicgates4.WaveformsChapteroverviewCH3LOGICGATESLogicaloperat1Thestandardlogicsymbol3-1TheInverterDistinctiveshapesymbolsRectangularoutlinesymbolsThenegationindicatorsThepolarityindicatorsThestandardlogicsymbol3-1T22.TruthtableInputsoutputsAX01102.TruthtableInputs33.Operation4.Timingdiagram5.Logicexpression:6.Applicationexample:1’scomplementcircuit3.Operation41.ThestandardlogicsymbolABX3-2TheAndGateDistinctiveshape＆XABRectangularoutline1.ThestandardlogicsymbolAB53.ANDOperation

IfinputsAandBareHIGH,outputXisHIGH;IfeitherAorBisLOW,orifbothAandBareLOW,XisLOW3.ANDOperation

IfinputsAa64.TruthtableInputsoutputsABX000010100111Table3-2Truthtablefora2-inputANDgate4.TruthtableInputs73.PulsedOperation

Omission(P105,e.g.3-3)ABX3.PulsedOperationOmissionA8

X=AB

Or4.Logicexpression4.Logicexpression9BooleanmultiplicationBooleanmultiplication105.ApplicationexampleTheANDGateasanEnable/InhibitDeviceFig.3-15p1085.ApplicationexampleTheAND111.Thestandardlogicsymbol3-3TheORGate≥1XABRectangularoutlineXABDistinctiveshapesymbol1.Thestandardlogicsymbol3122.LogicalOperationifeitherinputAorBisHIGH,outputXisHIGHifbothAandBareHIGH;XisHIGHifbothAandBareLOW,Xislow.2.LogicalOperation133.TruthtableInputsoutputsABX000011101111Inputsoutpu144.PulsedOperationABX4.PulsedOperationABX155.LogicexpressionX=A+BBooleanadditionisthesameastheORfunction5.Logicexpression16

4.Applicationexample

Fig.3-24Intrusiondetectionandalarmsystem

4.Applicationexample

Fig.17TheNANDisauniversalgate,ItcanbeusedincombinationtoperformtheAND,OR,andinverteroperations.3-4TheNANDGateTheNANDisauniversalgate,18ThestandardlogicsymbolRectangularoutlinesymbol＆XABXABDistinctiveshapesymbolThestandardlogicsymbolRecta19ThestandardlogicsymbolLogicalOperationTruthtablePulsedOperationLogicexpression(Omisssion)3-5TheNORGateThestandardlogicsymbol3-5203-6TheEXCLUSIVE-ORand

EXCLUSIVE-NORGates=1XABXABThestandardlogicsymbol3-6TheEXCLUSIVE-ORand

21CMOS:ComplementaryMetal-OxideSemiconductorWidelyusedinVLSI,ULSI3-7IntegratedcircuitlogicgatesCMOSandTTLarethemostwidelyusedICtechnologies,ECLisusedinmorespecializedapplicationsCMOS:3-7Integratedcircuit22400074HC74HCT74VHC74VHCT速度慢与TTL不兼容抗干扰功耗低74LVC74AUC速度加快与TTL兼容负载能力强抗干扰功耗低速度两倍于74HC与TTL兼容负载能力强抗干扰功耗低低(超低)电压速度更加快与TTL兼容负载能力强抗干扰功耗低400074HC74HCT74VHC74VHCT速度慢232.

TTL:Transistor-TransistorLogicUsedinMSI,LSI74LSseries

74series74ASseries

74ALSseries2.TTL:Transistor-Transistor243-7Performancecharacteristicsandparameters数电第三章逻辑门(logic-gatas)原版英文教材辅助课件25输出高电平+VDD

VOH(min)VOL(max)

0

G1门vO范围

vO

输出低电平

输入高电平VIH(min)

VIL(max)

+VDD

0

G2门vI范围

输入低电平

vI

vO

vI

驱动门G1

负载门G2

1

1

输出+VDDVOH(min)VOL(max)0G1门v263-8Troubleshooting3-9Digitalsystemapplication3-8Troubleshooting27CH3LOGICGATESLogicaloperation2.Application3.Troubleshootingoflogicgates4.WaveformsChapteroverviewCH3LOGICGATESLogicaloperat28Thestandardlogicsymbol3-1TheInverterDistinctiveshapesymbolsRectangularoutlinesymbolsThenegationindicatorsThepolarityindicatorsThestandardlogicsymbol3-1T292.TruthtableInputsoutputsAX01102.TruthtableInputs303.Operation4.Timingdiagram5.Logicexpression:6.Applicationexample:1’scomplementcircuit3.Operation311.ThestandardlogicsymbolABX3-2TheAndGateDistinctiveshape＆XABRectangularoutline1.ThestandardlogicsymbolAB323.ANDOperation

IfinputsAandBareHIGH,outputXisHIGH;IfeitherAorBisLOW,orifbothAandBareLOW,XisLOW3.ANDOperation

IfinputsAa334.TruthtableInputsoutputsABX000010100111Table3-2Truthtablefora2-inputANDgate4.TruthtableInputs343.PulsedOperation

Omission(P105,e.g.3-3)ABX3.PulsedOperationOmissionA35

X=AB

Or4.Logicexpression4.Logicexpression36BooleanmultiplicationBooleanmultiplication375.ApplicationexampleTheANDGateasanEnable/InhibitDeviceFig.3-15p1085.ApplicationexampleTheAND381.Thestandardlogicsymbol3-3TheORGate≥1XABRectangularoutlineXABDistinctiveshapesymbol1.Thestandardlogicsymbol3392.LogicalOperationifeitherinputAorBisHIGH,outputXisHIGHifbothAandBareHIGH;XisHIGHifbothAandBareLOW,Xislow.2.LogicalOperation403.TruthtableInputsoutputsABX000011101111Inputsoutpu414.PulsedOperationABX4.PulsedOperationABX425.LogicexpressionX=A+BBooleanadditionisthesameastheORfunction5.Logicexpression43

4.Applicationexample

Fig.3-24Intrusiondetectionandalarmsystem

4.Applicationexample

Fig.44TheNANDisauniversalgate,ItcanbeusedincombinationtoperformtheAND,OR,andinverteroperations.3-4TheNANDGateTheNANDisauniversalgate,45ThestandardlogicsymbolRectangularoutlinesymbol＆XABXABDistinctiveshapesymbolThestandardlogicsymbolRecta46ThestandardlogicsymbolLogicalOperationTruthtablePulsedOperationLogicexpression(Omisssion)3-5TheNORGateThestandardlogicsymbol3-5473-6TheEXCLUSIVE-ORand

EXCLUSIVE-NORGates=1XABXABThestandardlogicsymbol3-6TheEXCLUSIVE-ORand

48CMOS:ComplementaryMetal-OxideSemiconductorWidelyusedinVLSI,ULSI3-7IntegratedcircuitlogicgatesCMOSandTTLarethemostwidelyusedICtechnologies,ECLisusedinmorespecialized