Logic gates

Question 1

Truth table for NOT logic gate

Answer 1

INPUT OUTPUT
A Q = NOT A
0 1
1 0

Question 2

Truth table for AND logic gate

Answer 2

INPUTS	OUTPUT
A	B	Q
0	0	0
0	1	0
1	0	0
1	1	1

Question 3

Truth table for OR logic gate

Answer 3

INPUTS	OUTPUT
A	B	Q
0	0	0
0	1	1
1	0	1
1	1	1

Question 4

Truth table for XOR logic gate

Answer 4

INPUTS   	OUTPUT
A    	B	        A XOR B
0	0	        0
0	1	        1
1	0	        1
1	1	        0

Question 5

Truth table for NAND logic gate

Answer 5

A	B	A AND B  	NOT (A AND B)
0	0	0	                1
0	1	0                  	1
1	0	0              	1
1	1	1               	0

Question 6

Truth table for NOR logic gate

Answer 6

A	B	A OR B	 NOT (A OR B)
0	0	0	         1
0	1	1	         0
1	0	1	         0
1	1	1	         0

Question 7

Construct a half adder

Answer 7

A and B leading to both AND gate and XOR gate. Top line (Carry A.B) bottom line (SUM A+B)

Question 8

What is the use of an edge triggered D type flip flop circuit?

Answer 8

Every other clock signal, the value of Q changes