Logic Gates – Combination of Logic Gate

  1. Logic gates can be combined together to perform certain tasks.
  2. The output can be determined by constructing a truth table.
Example 1:
In the combination of logic gate above, find the outputs X, Y and Z of of the inputs A and B. Answer:
INPUT OUTPUT
A B X Y Z
0 0 1 1 1
0 1 1 0 1
1 0 1 1 1
1 1 0 0 0
 
 
Example 2:
In the combination of logic gate above, find the outputs X, Y and Z of of the inputs A and B. Answer:
INPUT OUTPUT
A B X Y Z
0 0 1 1 1
0 1 1 0 1
1 0 0 1 1
1 1 0 0 0
 
 
Example 3:
In the combination of logic gate above, find the outputs X, Y and Z of of the inputs A and B. Answer:
INPUT OUTPUT
A B W X Y Z
0 0 0 0 1 0
0 1 1 0 0 0
1 0 1 1 0 0
1 1 1 1 0 0
 
 
Example 4:
In the combination of logic gate above, find the outputs X, Y and Z of of the inputs A and B. Answer:
INPUT OUTPUT
A B W X Y Z
0 0 0 0 1 1
0 1 1 0 0 0
1 0 1 0 0 0
1 1 1 1 0 1