1
GATE EE 1993
MCQ (More than One Correct Answer)
+1
-0
A Wein bridge oscillator is shown in figure. Which of the following statements are true if $$'f'$$ is the frequency of oscillation? GATE EE 1993 Analog Electronics - Feedback Amplifiers and Oscillator Circuits Question 2 English
A
For $$R = 1\,k\Omega ,\,C = {1 \over {2\pi }}\mu F,\,\,f = 1\,kHz$$
B
$$R = 3\,k\Omega ,\,C = {1 \over {18\pi }}\mu F,\,\,f = 3\,kHz$$
C
The gain of the op-amp stage should be less than two for proper operation
D
The gain of the op-amp stage should be three for proper operation
2
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
In a common Emitter amplifier, the un bypassed emitter resistance provides
A
Voltage - shunt feedback
B
Current - Series feedback
C
Negative - Voltage feedback
D
Positive - current feedback
3
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
The voltage series feedback in a feedback amplifier leads to
A
increase in band width, while the voltage gain becomes less sensitive to variations in components and device characteristics
B
decrease in overall gain, while the input resistance decreases
C
increase in distortion, while the output resistance decreases
D
decrease in input resistance, while the output resistance increases
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