Integrator and Differentiator Circuits — MCQs – EE

1. An Op-Amp integrator produces an output that is proportional to the:
(A) Input voltage
(B) Derivative of the input
(C) Integral of the input
(D) Square of the input

2. An Op-Amp differentiator produces an output that is proportional to the:
(A) Input voltage
(B) Derivative of the input
(C) Integral of the input
(D) Constant value

3. In an ideal integrator circuit, the feedback element is a:
(A) Resistor
(B) Capacitor
(C) Inductor
(D) Diode

4. In an ideal differentiator circuit, the input element is a:
(A) Resistor
(B) Capacitor
(C) Inductor
(D) Transformer

5. The output of an ideal integrator for a constant DC input is:
(A) A DC level
(B) A linear ramp
(C) A sine wave
(D) A square wave

6. The output of an ideal differentiator for a constant DC input is:
(A) Constant DC
(B) Zero
(C) Increasing ramp
(D) Decreasing ramp

7. In a practical integrator, a resistor is connected in parallel with the feedback capacitor to:
(A) Increase gain
(B) Limit DC drift
(C) Reduce noise
(D) Improve phase shift

8. In a practical differentiator, a resistor is connected in series with the input capacitor to:
(A) Prevent high-frequency noise
(B) Increase bandwidth
(C) Increase output voltage
(D) Decrease input impedance

9. An ideal Op-Amp integrator has a phase shift of:
(A) 0°
(B) 45°
(C) 90°
(D) 180°

10. A differentiator circuit has a phase shift of:
(A) 0°
(B) 90°
(C) 180°
(D) 270°

11. The output waveform of an integrator for a square wave input is:
(A) Square wave
(B) Triangular wave
(C) Sine wave
(D) DC

12. The output waveform of a differentiator for a triangular input is:
(A) Triangular
(B) Square
(C) Sine
(D) Constant

13. The input impedance of an ideal integrator at low frequency is:
(A) Low
(B) High
(C) Zero
(D) Constant

14. The input impedance of a differentiator at high frequency is:
(A) High
(B) Low
(C) Zero
(D) Infinite

15. The practical integrator behaves as an inverting amplifier at:
(A) High frequency
(B) Low frequency
(C) DC
(D) Both (B) and (C)

16. A differentiator can act as a:
(A) High-pass filter
(B) Low-pass filter
(C) Band-stop filter
(D) Band-pass filter

17. An integrator can act as a:
(A) High-pass filter
(B) Low-pass filter
(C) Band-pass filter
(D) All-pass filter

18. The gain of an ideal integrator decreases with:
(A) Frequency
(B) Input voltage
(C) Feedback resistance
(D) Temperature

19. The gain of an ideal differentiator increases with:
(A) Frequency
(B) Input voltage
(C) Output current
(D) Temperature

20. An ideal differentiator circuit amplifies:
(A) Low-frequency signals
(B) High-frequency signals
(C) Only DC
(D) Noise signals

21. The main limitation of a practical differentiator is:
(A) High-frequency noise amplification
(B) Low gain
(C) High output impedance
(D) Narrow bandwidth

22. The capacitor in an integrator is responsible for:
(A) Differentiation
(B) Summation
(C) Accumulation of charge
(D) Limiting current

23. The capacitor in a differentiator is responsible for:
(A) Storing energy
(B) Producing current proportional to rate of voltage change
(C) Maintaining constant voltage
(D) Integrating the signal

24. An Op-Amp integrator circuit is commonly used in:
(A) Filters
(B) Analog computers
(C) Signal generators
(D) All of the above

25. An Op-Amp differentiator circuit is commonly used in:
(A) Edge detection and wave shaping
(B) DC amplification
(C) Voltage regulation
(D) Audio amplification

26. The feedback path of an integrator contains:
(A) Resistor only
(B) Capacitor only
(C) Both resistor and capacitor
(D) Inductor

27. The feedback path of a differentiator contains:
(A) Resistor only
(B) Capacitor only
(C) Inductor only
(D) Diode

28. The output voltage of an inverting integrator is:
(A) In phase with input
(B) 180° out of phase with input
(C) 90° out of phase
(D) Constant

29. The output voltage of an inverting differentiator is:
(A) In phase with input
(B) 180° out of phase with input
(C) 90° out of phase
(D) Random phase

30. A practical Op-Amp differentiator circuit is designed to:
(A) Limit high-frequency gain and noise
(B) Increase gain at high frequencies
(C) Amplify all signals equally
(D) Work as a voltage follower