Question

A waveform shown when applied to the following circuit will produce which of the following output waveforms. Assume ideal diode configuration and $R_1=R_2$

• A.
• B.
• C.
• D.

Answer 1

Answer: (D)

The $PN$ junction will conduct only when it is forward biased i.e. when $-5V$ is fed to it. So, it will conduct only for third-quarter part of the signal shown and when it conducts potential drop $5V$ will be across both the resistors, so output voltage across $R_2$ is $2.5V$ .
$\therefore {\text{V}}_0=-2.5\text{V}$
When input voltage is $5V$ , $PN$ junction is reversed biased. So, output voltage will be zero at that time.