MCQOPTIONS
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MCQOPTIONS
This section includes 31 Mcqs, each offering curated multiple-choice questions to sharpen your Active Filter Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Initially, the closed-loop gain ( A cl ) of a Wien-bridge oscillator should be |
| A. | A cl < 3 |
| B. | A cl > 3 |
| C. | 0 |
| D. | A cl 1 |
| Answer» C. 0 | |
| 2. |
If the value of resistor R f in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs, the output will be equal to |
| A. | the average of the individual inputs |
| B. | the inverted sum of the individual inputs |
| C. | the sum of the individual inputs |
| D. | the inverted average of the individual inputs |
| Answer» E. | |
| 3. |
The formula shows that for a given capacitor, if the voltage changes at a constant rate with respect to time, the current will |
| A. | increase |
| B. | decrease |
| C. | be constant |
| D. | decrease logarithmically |
| Answer» D. decrease logarithmically | |
| 4. |
A comparator with hysteresis is sometimes known as a(n) |
| A. | integrator. |
| B. | differentiator. |
| C. | Schmitt trigger. |
| D. | none of the above |
| Answer» D. none of the above | |
| 5. |
Which of the following are variations of the basic summing amplifier? |
| A. | averaging amplifier |
| B. | scaling amplifier |
| C. | both of the above |
| D. | - |
| Answer» D. - | |
| 6. |
In a comparator with output bounding, what type of diode is used in the feedback loop? |
| A. | Schottky |
| B. | junction |
| C. | zener |
| D. | varactor |
| Answer» D. varactor | |
| 7. |
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 |
| Answer» D. uses a resistor in its feedback circuit or uses a capacitor in its feedback circuit | |
| 8. |
________ is a mathematical process for determining the rate of change of a function. |
| A. | Integration |
| B. | Differentiation |
| C. | Summing |
| D. | Comparatoring |
| Answer» C. Summing | |
| 9. |
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. | none of the above |
| D. | - |
| Answer» B. scaling | |
| 10. |
Refer to the given figure. Determine the lower trigger point. |
| A. | +V (out)max |
| B. | –V (out)max |
| C. | –2.47 V |
| D. | +2.47 V |
| Answer» D. +2.47 V | |
| 11. |
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. |
| Answer» E. | |
| 12. |
What type(s) of circuit(s) use comparators? |
| A. | summer |
| B. | nonzero-level detector |
| C. | averaging amplifier |
| D. | summer and nonzero-level detector |
| Answer» C. averaging amplifier | |
| 13. |
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 |
| D. | - |
| Answer» C. both of the above | |
| 14. |
Refer to the given figure. With the inputs shown, determine the output voltage. |
| A. | 7 V |
| B. | –7 V |
| C. | +V sat |
| D. | –V sat |
| Answer» D. –V sat | |
| 15. |
Refer to the given figure. Determine the output voltage, V OUT . |
| A. | 1.05 V |
| B. | –0.35 V |
| C. | 0.35 V |
| D. | –1.05 V |
| Answer» B. –0.35 V | |
| 16. |
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. |
| Answer» E. | |
| 17. |
A good example of hysteresis is a(n) |
| A. | AM radio. |
| B. | thermostat. |
| C. | alarm clock. |
| D. | none of the above |
| Answer» C. alarm clock. | |
| 18. |
Refer to the given figure. Determine the output voltage. |
| A. | 1 V |
| B. | –1 V |
| C. | +V sat |
| D. | –V sat |
| Answer» D. –V sat | |
| 19. |
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 |
| Answer» B. differentiator | |
| 20. |
An op-amp has an open-loop gain of 90,000. V sat = ±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 V p-p |
| D. | 26 V p-p |
| Answer» E. | |
| 21. |
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. |
| Answer» C. select the lowest value input. | |
| 22. |
Refer to the given figure. If V in = 5 V, the rate of change of the output voltage in response to a single pulse input is: |
| A. | 15.2 mV/ s |
| B. | 1.52 V/ s |
| C. | 1.52 mV/ s |
| D. | 15.2 V/ s |
| Answer» D. 15.2 V/ s | |
| 23. |
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 |
| Answer» E. | |
| 24. |
Refer to the given figure. Determine the upper trigger point. |
| A. | V (out)max |
| B. | –V (out)max |
| C. | –1.41 V |
| D. | +1.41 V |
| Answer» E. | |
| 25. |
A comparator with a Schmitt trigger has |
| A. | two trigger levels. |
| B. | a fast response. |
| C. | a slow response. |
| D. | one trigger level. |
| Answer» B. a fast response. | |
| 26. |
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. |
| Answer» C. 10 V. | |
| 27. |
Refer to the given figure. What is the output voltage? |
| A. | 2 V |
| B. | –2 V |
| C. | +V sat |
| D. | –V sat |
| Answer» E. | |
| 28. |
Refer to the given figure. A square-wave input is applied to this amplifier. The output voltage is most likely to be |
| A. | a square wave. |
| B. | a triangle wave. |
| C. | a sine wave. |
| D. | no output. |
| Answer» C. a sine wave. | |
| 29. |
Refer to the given figure. This circuit is known as |
| A. | a noninverting amplifier. |
| B. | a differentiator. |
| C. | an integrator. |
| D. | a summing amplifier. |
| Answer» C. an integrator. | |
| 30. |
The output of a Schmitt trigger is a |
| A. | pulse waveform. |
| B. | sawtooth waveform. |
| C. | sinusoidal waveform. |
| D. | triangle waveform. |
| Answer» B. sawtooth waveform. | |
| 31. |
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. |
| Answer» C. a comparator with three trigger points. | |