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GATE 2022 : Analog Electronics Quiz 4

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Question 1

Consider the Colpitts oscillator circuit shown in figure below with parameters L = 1 μH, C1 = 1 nF, C2 = 1 nF, R = 4 kΩ. What is the oscillator frequency (in MHz, rounded upto 2 decimal values)?

Question 2

A 555 timer is configured to run in astable mode. Determine the duty cycle of the output.

Question 3

For 555 astable multivibrator, if C = 0.01 μF, RA = 10 kΩ, RB = 50 kΩ, the frequency and the duty cycle will be nearly

Question 4

The circuit shown is a sinusoidal oscillator. Find the value of resistor Rx (in kΩ) for sustained oscillations.




Question 5

Design the RC elements of a Wein bridge oscillator as in below figure for operation at f0 = 10 kHz



Question 6

Find the relation between R1 and R2 for sustained oscillations.

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Aug 6ESE & GATE EE