Operational Amplifier and Its Applications MCQs

140 questionsElectronics-EngineeringPage 15 of 16

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Question 127easy
In a practical clamping circuit, a resistor R is placed across the diode. This is
Question 128easy
If the polarity of the diode in the above circuit is reversed, the circuit would behave
Question 129easy
If the step-up ratio of a pulse transformer is increased by a factor of 4, the rise time
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Question 130easy
In order to reduce the drop in the flat top portion of the pulse and the backswing at the end of the pulse, it is required to have
Question 131easy
The flat-top response of the pulse transformer is nothing out
Question 132easy
Rise time response of a pulse transformer is nothing but its
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Question 133easy
A pulse transformer is to be designed to handle 1 is wide pulses. The source resistance from which it is fed is about 1 k.G. To minimize both percentage tilt and backswing, the magnetizing inductance should be of the order of
Question 134easy
In pulse-transformers, it is always desirable to use
Question 135easy
A differential amplifier has a differential gain of 20,000. CMRR = 80 dB. The common mode gain is gain by
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