GATE ECE 2017 Paper 2 — page 5

Questions 13–15 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 5 of 22

In the figure, D1 is a real silicon

junction diode with a drop of 0.7 V under forward bias condition and D2 is a Zener diode with breakdown voltage of

V. The input

is a periodic square wave of period T, whose one period is shown in the figure.

Assuming

, where

is the time constant of the circuit, the maximum and minimum values of the output waveform are respectively

Your answerChoose one option.

7.5 V and −20.5 V

6.1 V and −21.9 V

7.5 V and −21.2 V

6.1 V and −22.6 V

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Consider the circuit shown in the figure. Assume base-to-emitter voltage

and common-base current gain

of the transistor is unity.

The value of the collector-to-emitter voltage

(in volt) is _____.

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For the circuit shown in the figure,

and

are the inputs and

is the output.

The logic implemented by the circuit is

Your answerChoose one option.

XNOR

XOR

NOR

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2017 · Paper 2