Basic Op-Amp Circuits Mcqs | N4notes

Basic Op-Amp Circuits Mcqs

1. The output of a Schmitt trigger is a

  • A. pulse waveform.
  • B. sawtooth waveform.
  • C. sinusoidal waveform.
  • D. triangle waveform.

2. A Schmitt trigger is

  • A. a comparator with only one trigger point.
  • B. a comparator with hysteresis.
  • C. a comparator with three trigger points.
  • D. none of the above.

3. An integrator circuit

  • A. uses a resistor in its feedback circuit.
  • B. uses an inductor in its feedback circuit.
  • C. uses a capacitor in its feedback circuit.
  • D. uses a resistor in its feedback circuit or uses a capacitor in its feedback circuit

4. In a(n) _____, when the input voltage exceeds a specified reference voltage, the output changes state.

  • A. integrator
  • B. differentiator
  • C. summing amplifier
  • D. comparator

5. A good example of hysteresis is a(n)

  • A. AM radio.
  • B. thermostat.
  • C. alarm clock.
  • D. none of the above

6. A comparator with hysteresis is sometimes known as a(n)

  • A. integrator.
  • B. differentiator.
  • C. Schmitt trigger.
  • D. none of the above

7. What is (are) the necessary component(s) for the design of a bounded comparator?

  • A. rectifier diodes
  • B. zener diodes
  • C. both of the above

8. Which of the following are variations of the basic summing amplifier?

  • A. averaging amplifier
  • B. scaling amplifier
  • C. both of the above

9. What circuit produces an output that approximates the area under the curve of an input function?

  • A. integrator
  • B. differentiator
  • C. summing amplifier
  • D. comparator

10. _____ is a mathematical process for determining the rate of change of a function.

  • A. Integration
  • B. Differentiation
  • C. Summing
  • D. Comparatoring

11. A(n) ______ amplifier is a summing amplifier with a closed-loop gain equal to the reciprocal of the number of inputs.

  • A. averaging
  • B. scaling
  • C. differentiating
  • D. none of the above

12. What type(s) of circuit(s) use comparators?

  • A. summer
  • B. nonzero-level detector
  • C. averaging amplifier
  • D. summer and nonzero-level detector

13. If an op-amp comparator has a gain of 100,000, an input difference of 0.2 mV above reference, and a supply of ±12 V, the output will be

  • A. 20 V.
  • B. 12 V.
  • C. 10 V.
  • D. 15 V.

14. To reduce the effects of noise resulting in erratic switching of output states of a comparator, you can use

  • A. the upper trigger point.
  • B. the lower trigger point.
  • C. nonzero-level detection.
  • D. hysteresis.

15. A comparator with a Schmitt trigger has

  • A. two trigger levels.
  • B. a fast response.
  • C. a slow response.
  • D. one trigger level.

16. In a comparator with output bounding, what type of diode is used in the feedback loop?

  • A. Schottky
  • B. junction
  • C. zener
  • D. varactor

17. In a flash A/D converter, the priority encoder is used to

  • A. select the first input.
  • B. select the highest value input.
  • C. select the lowest value input.
  • D. select the last input.

18. A differentiator is used to measure

  • A. the sum of the input voltages.
  • B. the difference between two voltages.
  • C. the area under a curve.
  • D. the rate of change of the input voltage.

19. An op-amp has an open-loop gain of 90,000. Vsat = ±13 V. A differential voltage of 0.1 V p-p is applied between the inputs. What is the output voltage?

  • A. 13 V
  • B. –13 V
  • C. 13 Vp-p
  • D. 26 Vp-p