Clippers and Clampers MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Clippers and Clampers”.

1. The clipping level in op-amp is determined by
a) AC supply voltage
b) Control voltage
c) Reference voltage
d) Input voltage

2. In a positive clipper, the diode conducts when
a) Vin < Vref
b) Vin = Vref
c) Vin > Vref
d) None of the mentioned

3. Which circuit is used for obtaining desired output waveform in operational amplifier?
a) Clipper
b) Clamper
c) Peak amplifier
d) Sample and hold

4. What happens if the potentiometer Rp is connected to negative supply?

Find the output waveform if the potentiometer Rp is connected to negative supply

a) Output waveform below -Vref will be clipped off
b) Output waveform above +Vref will be clipped off
c) Output waveform above -Vref will be clipped off
d) Output waveform below +Vref will be clipped off

5. What happens if the input voltage is higher than reference voltage in a positive clipper?
a) Output voltage = Reference voltage
b) Output voltage = DC Positive voltage
c) Output voltage = Input voltage
d) All of the mentioned

6. Determine the output waveform of negative small signal half wave rectifier.

Determine the output waveform of negative small signal half wave rectifier

a)
Find output waveform of negative small signal from the given diagram
b)
Find the positive alteration of Vin from the given diagram
c)
Find the negative alteration of Vin from the given diagram
d)
Find D1 forward biased of diode from the given diagram

7. Find the output waveform for when Vin < Vref

Find the output waveform for when Vin less than Vref from given circuit

a)
Find negative portion of the output voltage from the given diagram
b)
Find the diode in off condition from the given diagram
c)
Find positive portion of the output voltage from the given diagram
d)
Find the -Vref when clipped off from the given diagram

8. A positive small signal halfwave rectifier can
a) Rectify signals with peak value only
b) Rectify signals with value of few millivolts only
c) Rectify signals with both peak value and down to few millivolts
d) None of the mentioned

9. Diode in small signal positive halfwave rectifier circuit acts as
a) Ideal diode
b) Clipper diode
c) Clamper diode
d) Rectifier diode

10. Why a voltage follower stage is connected at the output of the negative small signal half wave rectifier?
a) Due to Non-uniform input resistance
b) Due to Non-uniform output resistance
c) Due to Uniform output voltage
d) None of the mentioned

11. Determine the output waveform for a peak amplifier with input =4Vpsinewave and Vref=1V.
a)
Find output waveform for a peak amplifier from the given diagram
b)
Find input waveform peak from the given diagram
c)
Find the op-amp clamper circuit from the given diagram
d)
Find input 4Vp sinewave from the given diagram

12. How to minimize the response time and increase the operating frequency range of the op-amp?
a) Positive halfwave rectifier with two diodes
b) Positive halfwave rectifier with one diode
c) Negative halfwave rectifier with two diodes
d) Negative halfwave rectifier with one diode

13. A circuit with a predetermined dc level is added to the output voltage of the op-amp is called
a) Clamper
b) Positive clipper
c) Halfwave rectifier
d) None of the mentioned

14. An op-amp clamper circuit is also referred as
a) DC cutter
b) DC inserter
c) DC lifter
d) DC leveller

15. At what values of Ci and Rd a precision clamping can obtained in peak clamper when the time period of the input waveform is 0.4s?
a) Ci=0.1µF and Rd=10kΩ
b) Ci=0.47µF and Rd=10kΩ
c) Ci=33µF and Rd=10kΩ
d) Ci=2.5µF and Rd=10kΩ

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