 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)

• 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