GATE EE
Analog Electronics
Feedback Amplifiers and Oscillator Circuits
Previous Years Questions

Marks 1

In the Wien Bridge oscillator circuit shown in figure, the bridge is balanced when ...
In the feedback network shown below, if the feedback factor $$k$$ is increased, then the ...
As shown in the figure, a negative feedback system has an amplifier of gain $$100$$ with $$ \pm 10\% $$ tolerance in the forward path, and an attenuat...
An op-amp has an open-loop gain of $${10^5}$$ and an open-loop upper cutoff frequency of $$10$$ $$Hz.$$ If this op-amp is connected as an amplifier wi...
A practical $$R$$-$$C$$ sinusoidal oscillator is built using a positive feedback amplifier with a closed loop gain slightly less than unity.
Given figure shows a two stage small signal transistor feedback amplifier. Match the defective component (listed on the left hand side below) with its...
A Wein bridge oscillator is shown in figure. Which of the following statements are true if $$'f'$$ is the frequency of oscillation? ...
In a common Emitter amplifier, the un bypassed emitter resistance provides
The voltage series feedback in a feedback amplifier leads to

Marks 2

An oscillator circuit using ideal op-amp and diodes is shown in the figure. The duration for $$+ve$$ part of the cycle $$\Delta {t_1}$$ and for $$...
The circuit shown is a ...

Marks 5

Determine the transfer function $$\left( {{{{V_y}} \over {{V_x}}}} \right)$$ for the $$RC$$ network shown in figure $$(1).$$ The network is used ...
Show that the circuit given in fig. will work as an oscillator at $$f = {1 \over {2\pi RC}},$$ if $${R_1} = 2{R_2}$$ ...
Determine the frequency of Oscillation of the circuit shown in figure, Assume the OP-amp to be ideal ...
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