Question

Identify the gates P and Q shown in the figure. Write the truth table for the combination of the gates shown.



Name the equivalent gate representing this circuit and write its logic symbol.

Answer 1

Logic gate P is an AND gate and logic gate Q is a NOT gate. The truth table for output X and Y is given below.

Truth Table
$\begin{array}{cccc}A& B& X=AB& Y=\overline{AB}\\ 0& 1& 0& 1\\ 1& 0& 0& 1\\ 0& 1& 0& 1\\ 1& 1& 1& 0\end{array}$

The combination is a NAND gate.