Transcription of Basic Logic Gates Logic Gates 1 - Virginia Tech
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Basic Logic Gates Logic Gates 1 - Virginia Tech
Computer Science Dept Va Tech October 2003 2003 McQuain WD & Keller BJ1 Logic GatesOO Software design and ConstructionBasic Logic GatesandGate:accepts two binary inputs xand y, emits x & y111001010000 OutputyxorGate:accepts two binary inputs xand y, emits x | y111101110000 OutputyxnotGate:accepts one binary input x, emits !y0110 OutputxComputer Science Dept Va Tech October 2003 2003 McQuain WD & Keller BJ2 Logic GatesOO Software design and ConstructionBasic Logic GatesnandGate:accepts two binary inputs xand y, emits !(x & y)011101110100 OutputyxxorGate:accepts two binary inputs xand y, emits x ^ y011101110000 OutputyxThe Basic Logic Gates can be combined to form more complex digital circuits of all fact, the NOT and AND Gates alone are sufficient, but that does not really concern Science Dept Va Tech October 2003 2003 McQuain WD & Keller BJ3 Logic GatesOO Software design and ConstructionModeling a Logic GateConsider the fundamental characteristics of the Logic Gates presented:- ability to connect to one or two input wires- ability to connect to one output wire- ability to receive a value from
Logic Gates 4 OO Software Design and Construction 2-input Logic Gate Hierarchy It is sensible to view each of the 2-input logic gates as a specialized sub-type of a generic logic gate (a base type) which has 2 input wires and transmits its output to a single output wire.
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