Given the truth table of a 4-to-2 priority decoder as below, deduce the logic expression of the
outputs of the decoder in terms of inputs, A3, A2, A1, A0 in PSO form.
[5 marks]
Truth Table for 4-to-2 priority encoder:
ANS:
$A_3$ $A_2$ $A_1$ $A_0$ $Y_1$ $Y_0$
0 0 0 0 0 0
0 0 0 1 0 0
0 0 1 0 0 1
0 0 1 1 0 1
0 1 0 0 1 0
0 1 0 1 1 0
0 1 1 0 1 0
0 1 1 1 1 0
1 0 0 0 1 1
1 0 0 1 1 1
1 0 1 0 1 1
1 0 1 1 1 1
1 1 0 0 1 1
1 1 0 1 1 1
1 1 1 0 1 1
1 1 1 1 1 1