Transcription of Basic Logic Gates Logic Gates 1 - Virginia Tech
{{id}} {{{paragraph}}}
Example: bachelor of science
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 a connected input wire- ability to transmit a value to a connected output wire- ability to compute correct output value, given current input value(s)Now, the notGate is something of an anomaly since it is the only one that takes a single input wire rather than two.
Abstract types play important roles in the design of inheritance hierarchies, even though no objects of those types will ever be created. We also note that each 2-input gate must be capable of supporting associations to two input wire objects and one output wire object.
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: