question_answer

Identify the logic gates marked P and Q in the given logic circuit. Write down the output at X for the inputs (i) \[\mathbf{A}\text{ }=\text{ }\mathbf{0},\text{ }\mathbf{B}\text{ }=\text{ }\mathbf{0}\]and (ii) \[\mathbf{A=1,B=1}\]

Answer:

                    The logic gate P is NOR gate and Q is AND gate.  

Input A	Input B	Output of NOR gate \[\Upsilon =\overline{\text{A+B}}\]	\[X=B.\Upsilon \]
0	0	1	0
1	1	0	0