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 $\_\_\_\_$ .

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 $B . Y_2=Y_1+B=\bar{A}+B$
A
Y
1
=
A
B
Output (Y
2
=
A
+ B)
1
0
1
1
0
1
1
1
$Y_3$ is the output of AND Gate which takes inputs $Y_1$ and $B \cdot Y_3=Y_1 \cdot B=\bar{A} \cdot B$
A
Y
1
=
A
B
Output (Y
3
=
A
ÃÂ· B)
1
0
1
0
0
1
1
1
$Y$ is the output of NOR Gate which takes inputs $Y_2$ and $Y_3 . Y=\overline{Y_2+Y_3}$
A
B
Y
2
=
A
+ B
Y
3
=
A
ÃÂ· B
Y =
Y
2
+ Y
3
1
1
1
0
1 + 0
=
1
= 0
0
1
1
1
1 + 1
=
1
= 0
For both input sets ( $A=1, B=1$ ) and ( $A=0, B=1$ ), the output $Y$ is 0 .
Thus, the correct option is ( $C$ ).

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: