Test: Introduction to Oscillators


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10 Questions MCQ Test GATE Electrical Engineering (EE) 2023 Mock Test Series | Test: Introduction to Oscillators

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Test: Introduction to Oscillators - Question 1

Oscillators are used to ______ AC voltage.

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Oscillators are used for generating AC voltage. They are often characterized by the frequency of the oscillations produced. There are two main types of electronic oscillators, linear/harmonic and nonlinear/relaxation oscillator.

Test: Introduction to Oscillators - Question 2

Negative resistance are incorporated in oscillator for ___________

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Negative resistance are incorporated in oscillator for sustained oscillation. Negative resistance will cancel the damping by positive (normal) resistance.

Test: Introduction to Oscillators - Question 3

Primary trigger for oscillation is obtained from ___________

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The primary trigger for oscillation is obtained from noise voltage.

Test: Introduction to Oscillators - Question 4

The output of a stable oscillator have ___________

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Output of a stable oscillator have constant amplitude and frequency. A common criteria is the Barkhausen stability criteria, wherein it states that loop gain should be unity and feedback should be positive.

Test: Introduction to Oscillators - Question 5

In an oscillator if phase of feedback is same as that of oscillation waveform then feedback is called ___________

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In an oscillator if phase of feedback is same as that of oscillation waveform then feedback is called positive feedback.

Test: Introduction to Oscillators - Question 6

Oscillator __________ an AC input for giving an AC output.

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An oscillator is an amplifier with positive feedback. It usually has a noise which is an amplifier as an oscillating output. They do not require any type of specific input to function properly.

Test: Introduction to Oscillators - Question 7

For accomplishing negative resistance in oscillator we use _____________

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The input or output impedance of an amplifier with positive feedback applied, can be negative. When loop gain is greater than 1, the input impedance is a negative value, over a linear range. These are also called active resistors.

Test: Introduction to Oscillators - Question 8

The AC power of output signal is obtained by ___________

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The Ac power of output signal is obtained by DC biasing voltage of amplifier.

Test: Introduction to Oscillators - Question 9

The output waveform of a stable oscillator have ___________

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Output of a stable oscillator have constant amplitude and frequency.

Test: Introduction to Oscillators - Question 10

The output of oscillator will not depend upon ___________

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The output of the oscillator will not depend upon input voltage. There is no input voltage for an oscillator.

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