GATE EE 1993 | Feedback Amplifiers and Oscillator Circuits Question 12 | Analog Electronics

GATE EE 1993

MCQ (More than One Correct Answer)

-0.3

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

GATE EE 1993 Analog Electronics - Feedback Amplifiers and Oscillator Circuits Question 2 English

For $$R = 1\,k\Omega ,\,C = {1 \over {2\pi }}\mu F,\,\,f = 1\,kHz$$

$$R = 3\,k\Omega ,\,C = {1 \over {18\pi }}\mu F,\,\,f = 3\,kHz$$

The gain of the op-amp stage should be less than two for proper operation

The gain of the op-amp stage should be three for proper operation

GATE EE 1992

MCQ (Single Correct Answer)

-0.3

In a common Emitter amplifier, the un bypassed emitter resistance provides

Voltage - shunt feedback

Current - Series feedback

Negative - Voltage feedback

Positive - current feedback

GATE EE 1992

MCQ (Single Correct Answer)

-0.3

The voltage series feedback in a feedback amplifier leads to

increase in band width, while the voltage gain becomes less sensitive to variations in components and device characteristics

decrease in overall gain, while the input resistance decreases

increase in distortion, while the output resistance decreases

decrease in input resistance, while the output resistance increases

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