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GATE 2023 Analog Circuits Quiz 57

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Question 1

Three amplifiers each of gain (A0/2) and producing a phase of 60° are connected in tandem. The feedback loop is closed through a positive gain of 0.008. What should be the value of A0 for the system to be oscillatory?

Question 2

RX for sustained oscillation is


Question 3

What is the frequency of oscillation for an RC phase shift oscillator with R of 10 kΩ and C of 0.002 μF in each of its three RC sections?

Question 4

A quartz crystal oscillator has an equivalent inductance of L = 10 mH and series and parallel capacitances of Cs = 10 μF and Cp = 10 μF. Find the series and parallel resonant frequencies of this oscillator?

Question 5

For the Hartley oscillator shown in figure, what is the value of oscillation frequency (in kHz)?

Question 6

The phase shift oscillator shown below operate at f = 80kHz. The value of resistance RF is ____ kΩ


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Jul 5ESE & GATE EC