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ESE 2019 Technical (Analog Circuits: Quiz 4 )
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Question 1
Which among the following circuit has large noise margin which is suitable for And-OR-Invert function?
Question 2
For JFET, the drain current I0 is:
Question 3
Assuming VCE(Sat) = 0.3V for a Silicon transistor at ambient temperature of 25oC and hFE = 50, the minimum base current IB required to drive the transistor into saturation for the circuit shown is
Question 4
Assertion (A): It is not desirable to drive a transistor into hard saturation in high speed switching circuits.
Reason (R): It may not be possible to bring it back to cut off state, if it is driven into hard saturation.
Reason (R): It may not be possible to bring it back to cut off state, if it is driven into hard saturation.
Question 5
Statement (I) : The β of a bipolar transistor is reduced, if the base width is increased.
Statement (II) : The β of a bipolar transistor increases, if the doping concentration in the base is increased.
Statement (II) : The β of a bipolar transistor increases, if the doping concentration in the base is increased.
Question 6
Consider the following statements regarding Wien Bridge oscillator:
1) It has a larger bandwidth than the phase shift oscillator.
2) It has a smaller bandwidth than the phase shift oscillator.
3) It has 2 capacitors while the phase shift oscillator has 3 capacitors.
4) It has 3 capacitors while the phase shift oscillator has 2 capacitors.
Which of the above statements are correct?
1) It has a larger bandwidth than the phase shift oscillator.
2) It has a smaller bandwidth than the phase shift oscillator.
3) It has 2 capacitors while the phase shift oscillator has 3 capacitors.
4) It has 3 capacitors while the phase shift oscillator has 2 capacitors.
Which of the above statements are correct?
Question 7
Consider the following statements regarding optocouplers:
1) Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output
2) Optocoupler is LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing
3) Optocouplers are used as temporary non-fixed joints between optical fibre terminations Which of the above statements are correct?
1) Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output
2) Optocoupler is LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing
3) Optocouplers are used as temporary non-fixed joints between optical fibre terminations Which of the above statements are correct?
Question 8
Consider the following statements:
1) A Schmitt trigger circuit can be emitter- coupled bi-stable circuit.
2) Schmitt trigger circuit exhibits hysteresis phenomenon.
3) The output of a Schmitt trigger will be triangular if the input is a square wave.
Which of these statements are correct?
1) A Schmitt trigger circuit can be emitter- coupled bi-stable circuit.
2) Schmitt trigger circuit exhibits hysteresis phenomenon.
3) The output of a Schmitt trigger will be triangular if the input is a square wave.
Which of these statements are correct?
Question 9
In the order to obtain repetitive pulses of unequal mark space one can use:
1) A voltage comparator fed with a triangular wave signal and dc voltage.
2) An astable multi-vibrator
3) A mono-stable multi-vibrator fed with a square wave input
1) A voltage comparator fed with a triangular wave signal and dc voltage.
2) An astable multi-vibrator
3) A mono-stable multi-vibrator fed with a square wave input
Question 10
The maximum efficiency of half-wave rectifier is.
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Nov 25ESE & GATE EC
