Saturday, 1 December 2012

Building Block of Computer:Encoder


By on 07:11

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

Now I discuss the examples of Encoder:-




1)4*2 decoder


Functional Table:-



I(0)I(1)I(2)I(3)D(1)D(o)
100000
010001
001010
000111


D(1)=I(2)+I(3)

D(0)=I(1)+I(3)



2)10*2 encoder or Decimal to binary encoder


I(0) I(1) I(2)
I(3)
I(4) I(5) I(6) I(7) I(8) I(9) D(3) D(2) D(1) D(0)
1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 0 0 1
0 0 1 0 0 0 0 0 0 0 0 0 1 0
0 0 0 1 0 0 0 0 0 0 0 0 1 1
0 0 0 0 1 0 0 0 0 0 0 1 0 0
0 0 0 0 0 1 0 0 0 0 0 1 0 1
0 0 0 0 0 0 1 0 0 0 0 1 1 0
0 0 0 0 0 0 0 1 0 0 0 1 1 1
0 0 0 0 0 0 0 0 1 0 1 0 0 0
0 0 0 0 0 0 0 0 0 1 1 0 0 1

D(3)=I(8)+I(9)

D(2)=I(5)+I(6)+I(4)+I(7)
D(1)=I(2)+I(3)+I(6)+I(7)
D(0)=I(1)+I(3)+I(5)+I(7)+I(9)






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