Saturday, 1 December 2012

Building Block of Computer:Decoder


By on 05:39

Decoder is a circuit or we can say its a combinational circuit that is used to decrypt(plain to cipher) the data and also convert binary information to decimal information.



Now I discuss the example of Decoder:-

1)2*4 decoder


Functional Table:-



I(1) I(0) D(3) D(2) D(1) D(o)
0 0 0 0 0 1
0 1 0 0 1 0
1 0 0 1 0 0
1 1 1 0 0 0


Logic Circuit:-



2)3*8 decoder(binary to octal)


Functional Table:-



I(2) I(1) I(0) D(7) D(6) D(5) D(4) D(3) D(2) D(1) D(0)
0 0 0 0 0 0 0 0 0 0 1
0 0 1 0 0 0 0 0 0 1 0
0 1 0 0 0 0 0 0 1 0 0
0 1 1 0 0 0 0 1 0 0 0
1 0 0 0 0 0 1 0 0 0 0
1 0 1 0 0 1 0 0 0 0 0
1 1 0 0 1 0 0 0 0 0 0
1 1 1 1 0 0 0 0 0 0 0

Logic Circuit:-




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