GATE Questions & Answers of Zener Diode

What is the Weightage of Zener Diode in GATE Exam?

Total 3 Questions have been asked from Zener Diode topic of Electronic Devices subject in previous GATE papers. Average marks 1.00.

In the figure, D1 is a real silicon pn junction diode with a drop of 0.7 V under forward bias condition and D2 is a Zener diode with breakdown voltage of -6.8 V. The input Vin(t) is a periodic square wave of period T, whose one period is shown in the figure.

Assuming  10 $\tau$ << T, where $\tau$ is the time constant of the circuit, the maximum and minimum values of the waveform are respectively.