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Home ‣ Electronics ‣ Basic Op-Amp Circuits Comments
  • Question

  • When used as a comparator, an op-amp is wired in a closed-loop configuration.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • Basic Op-Amp Circuits problems

    Search Results

    • 1. A zero-level detector is a type of comparator circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. The feedback component in an op-amp integrator is a capacitor.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. When the capacitance in an active high-pass filter increases, the critical frequency decreases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. 

      It takes ______ for the output voltage in the given circuit to reach its maximum value.


    • Options
    • A. 0 s
    • B. 243.9 µs
    • C. 1 ms
    • D. 1.22 ms
      • Discuss
    • 5. The _____ is the time it takes for a capacitor to fully charge or discharge.

    • Options
    • A. transient time
    • B. pulse response
    • C. time constant
    • D. steady state
      • Discuss
    • 6. To operate properly, an oscillator requires an external ac input signal.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The output voltage of a summing amplifier is proportional to the product of the input voltages.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The effectiveness of a filter in rejecting signals beyond cutoff frequency is a function of the filter roll-off rating.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. For a Wien-bridge oscillator to produce a sustained sine-wave output, the phase shift around the positive feedback loop must be greater than 0°.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A two-pole active filter produces a roll-off rate of ?20 dB/decade.

    • Options
    • A. True
    • B. False
      • Discuss

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