Question 21: Semiconductors and Logic Gates

Question

Consider the following logic circuit.
The output is Y = 0 when :

Accepted Answer

$$\begin{aligned}
& \mathrm{Y}_1=\mathrm{A} \cdot \mathrm{~B}, \mathrm{Y}_2=\overline{\mathrm{A}}+\mathrm{B} \
& \mathrm{Y}=\overline{\mathrm{Y}_1 \cdot \mathrm{Y}_2}=\overline{\mathrm{Y}}_1+\overline{\mathrm{Y}}_2 \
& \mathrm{Y}=\overline{\mathrm{A} \cdot \mathrm{~B}}+\overline{\overline{\mathrm{A}}+\mathrm{B}} \
& \mathrm{Y}=\overline{\mathrm{A}}+\overline{\mathrm{B}}+\mathrm{A} \cdot \overline{\mathrm{~B}}
\end{aligned}$$

Answer

A = 1 and B = 0

Answer

A = 0 and B = 0

Answer

A = 1 and B = 1

Answer

A = 0 and B = 1

Semiconductors and Logic Gates

Consider the following logic circuit. The output is Y = 0 when :

Choose the correct answer: