Question 2: Semiconductors and Logic Gates

Question

Refer to the logic circuit given below. For two inputs ( $A=1, B=1$ ) and ( $A=0, B=1$ ), output ( Y ) will be $\_\_\_\_$ .
![](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1mnt2wtlq/cae23d14-5d00-45ad-bb39-875dcc1118c7/7f2a4fe0-34f4-11f1-a0ba-554d230e3732/file-6y3zli1mnt2wtlr.png?format=png)

Accepted Answer

${Y}_1$ is the output of NOT Gate which takes input $A . Y_1=\bar{A}$ $\$
$ \begin{array}{|l|l|} \hline 	ext { Input }(\mathrm{A}) & 	ext { Output }\left(\mathrm{Y}_1=\overline{\mathrm{A}}ight) \ \hline 1 & 0 \ \hline 0 & 1 \ \hline \end{array} $ $\$
$Y_2$ is the output of OR Gate which takes inputs $Y_1$ and $B . $\$
Y_2=Y_1+B=\bar{A}+B$ $\$
$ \begin{array}{|l|l|l|} 
\hline 	ext { Input }(\mathrm{Y}_1) & 	ext { Input }(\mathrm{B}) & 	ext {Output}(\mathrm{Y}_2 = \bar{A} + B) \ 
\hline 0 & 1 & 0+1=1\ \hline 1 & 1 & 1+1=1\ \hline \end{array} $
$\$
$Y_3$ is the output of AND Gate which takes inputs $Y_1$ and $B \cdot $\$
Y_3=Y_1 \cdot B=\bar{A} \cdot B$ $\$
$ \begin{array}{|l|l|l|} 
\hline 	ext { Input }(\mathrm{Y}_1) & 	ext { Input }(\mathrm{B}) & 	ext {Output}(\mathrm{Y}_3 = \bar{A} \cdot B) \ 
\hline 0 & 1 & 0 \cdot 1=0\ \hline 1 & 1 & 1 \cdot 1=1\ \hline \end{array} $
$\$
$Y$ is the output of NOR Gate which takes inputs $Y_2$ and $Y_3 . $\$
Y=\overline{Y_2+Y_3}$ $\$
$ \begin{array}{|l|l|l|l|l|} 
\hline 	ext { Input A} & 	ext { Input B} & 	ext { Input }(\mathrm{Y}_2) & 	ext { Input }(\mathrm{Y}_3) & 	ext {Output}(\mathrm{Y} = \overline{Y_2+Y_3}) \ 
\hline 0 & 1 & 1 & 0 & \overline{1+0}=0\ \hline 1 & 1 & 1 & 1 & \overline{1+1}=0\ \hline \end{array} $
$\$
For both input sets ( $A=1, B=1$ ) and ( $A=0, B=1$ ), the output $Y$ is 0 . $\$
Thus, the correct option is ( $C$ ).
![](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1mo4fa6et/2e05c888-f196-4aed-96df-2b1c13b0cadb/7f457250-3b31-11f1-8c42-c7a7a182458c/file-6y3zli1mo4fa6eu.png?format=png)

Answer

1, 0 respectively

Answer

0, 1 respectively

Answer

0, 0 respectively

Answer

1, 1 respectively

Semiconductors and Logic Gates

Refer to the logic circuit given below. For two inputs ( A=1, B=1 ) and ( A=0, B=1 ), output ( Y ) will be \_\_\_\_ .

Choose the correct answer: