GATE 2022 EE – Question 25

Analog and Digital Electronics · Simple diode circuits: clipping, clamping, rectifiers · 1 mark · Multiple choice

For the circuit shown below with ideal diodes, the output will be

Diagram for GATE 2022 EE question 25

$V_{out}=V_{in}$ for $V_{in}>0$
$V_{out}=V_{in}$ for $V_{in}<0$
$V_{out}=-V_{in}$ for $V_{in}>0$
$V_{out}=-V_{in}$ for $V_{in}<0$

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Correct answer: (A) $V_{out}=V_{in}$ for $V_{in}>0$

Explanation

For $V_{in}>0$ the current flows from the source through $D_1$, the resistor $R_1$ and then back through $D_2$, which are both forward biased, so $V_{out}=V_{in}$. For $V_{in}<0$ both diodes are reverse biased and $V_{out}=0$.