1.why is the input A2 not used for encoding operations? 2. For this 4 to 2 encod
ID: 3697100 • Letter: 1
Question
1.why is the input A2 not used for encoding operations?
2. For this 4 to 2 encoder's truth table is there don't care terms? If yes, describe the meaning of that cases.
A3
A2
A1
A0
F0
F1
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
0
1
0
0
0
1
1
1
0
0
1
0
0
0
1
0
1
0
1
0
0
0
1
1
0
1
0
0
1
1
1
1
0
1
0
0
0
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
0
0
1
1
1
1
0
1
1
0
1
1
1
0
1
0
1
1
1
1
1
0
A3
A2
A1
A0
F0
F1
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
0
1
0
0
0
1
1
1
0
0
1
0
0
0
1
0
1
0
1
0
0
0
1
1
0
1
0
0
1
1
1
1
0
1
0
0
0
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
0
0
1
1
1
1
0
1
1
0
1
1
1
0
1
0
1
1
1
1
1
0
0 1 321 0Explanation / Answer
1. A2 is not attached to any of the gates. Basicaly it is not being used.Thatswhy it isw not used in encoding purpose