Basic principles of Sine Wave Oscillator – 3 MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Basic principles of Sine Wave Oscillator – 3″.

1. Sustained oscillation in wein bridge oscillator is possible when the value of ß is
a) 3
b) 1/3
c) 1
d) None of the mentioned

2. Determine the value of fo, ß and Rf from the following circuit diagram.

Determine the value of frequency of oscillation for the given circuit

a) fo = 80Hz, ß = 0.162 and Rf = 7kΩ
b) fo = 100Hz, ß = 1.62 and Rf = 7kΩ
c) fo = 60Hz, ß = 0.0162 and Rf = 7kΩ
d) fo = 120Hz, ß = 16.2 and Rf = 7kΩ

3. What is the frequency of oscillation of wein bridge oscillator?
a) fo = 1/(2πRC)
b) fo = 2π/RC
c) fo = RC/2π
d) fo = 2πRC

4. What is the problem faced by the wein bridge oscillator?
a) Output sinewave get clipped
b) Output sinewave remain constant without growing
c) Output sinewave keep on decreasing and die out
d) All of the mentioned

5. Calculate the value of capacitance in wein bridge oscillator, such that fo =1755Hz and R=3.3kΩ.
a) 2.7µF
b) 0.91µF
c) 0.03µF
d) 0.05µF

6. Which of the following component is not used for audio frequency?
a) RC oscillator
b) Wein bridge oscillator
c) LC oscillator
d) None of the mentioned

7. Find the type of oscillator shown in the diagram

Find the type of oscillator shown in the diagram

a) Quadrature oscillator
b) Biphasic oscillator
c) RC phase shit oscillator
d) None of the mentioned

8. Quadrature oscillators have signals with
a) Different frequency
b) Same frequency
c) Opposite frequency
d) Parallel frequency

9. Find the signal waveform for Quadrature oscillators?

Quadrature signal graph with phase shift of 90 degree

a) 

Phase difference and phase shift of an AC

b)

Phase shift waveform with 180 degree between sine waveform and cosine waveform

 c) 
d) All of the mentioned

10. What is the possible method used in Quadrature oscillator to remove distortion from the output waveform?
a) Replace the resistor at the input of non-inverting type amplifier with a potentiometer
b) Replace the resistor at the output of non-inverting type amplifier with a potentiometer
c) Replace the resistor at the input of inverting type amplifier with a potentiometer
d) None of the mentioned

11. If the resistor and capacitor values are same in Quadrature oscillator. Find its frequency of oscillation for R=50kΩ and C=0.01µF.
a) 112Hz
b) 275Hz
c) 159Hz
d) 318Hz

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