Thursday, 22 December 2011

5211 code


Design a circuit which receives 5211 code and detects decimal numbers 0,2,4,6 and 8.
Sol: First prepare a truth table of the circuit as given below.

Decimal  5(A) 2(B) 1(C) 1(D)    Output
0 0 0 0 0 1
1 0 0 0 1 0
2 0 0 1 1 1
3 0 1 0 1 0
4 0 1 1 1 1
5 1 0 0 0 0
6 1 0 1 0 1
7 1 1 0 0 0
8 1 1 1 0 1
9 1 1 1 1 0
Minimization is done using Kmap and we get
f=(A*)(D*)+(A*)C+C(D*)
Now draw the logic diagram using NAND.
[Here "*" represents complement.i.e. A*=A complement]










































































1 comment:

  1. is it important to use nand gates itself for realisation??

    ReplyDelete