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

  • A Wien-bridge oscillator uses _________.


  • Options
  • A. positive feedback
  • B. negative feedback
  • C. both types of feedback
  • D. an LC tank circuit

  • Correct Answer
  • both types of feedback 

    • Basic Op-Amp Circuits problems

    Search Results

    • 1. The control element in a basic shunt voltage regulator is a zener diode.

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

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. 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
    • 4. 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
    • 5. The output voltage of a summing amplifier is proportional to the product of the input voltages.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the Acl _______.

    • Options
    • A. reduced, equals one
    • B. reduced, is less than one
    • C. increased, is more than one
    • D. increased, is much greater than one
      • Discuss
    • 7. 

      The reference voltage for the comparator in the given circuit equals ______.


    • Options
    • A. 0 V
    • B. +8.8 V
    • C. +16 V
    • D. +7.2 V
      • Discuss
    • 8. 

      In the given circuit, VIN1 equals ______.


    • Options
    • A. +4 V
    • B. +20 V
    • C. ?4 V
    • D. ?20 V
      • Discuss
    • 9. The ______________ input makes the summing amplifier circuit possible.

    • Options
    • A. virtual ground at the noninverting
    • B. virtual ground at the inverting
    • C. low-voltage
    • D. high-voltage
      • Discuss
    • 10. A mathematical operation that determines the rate of change of a curve is called __________.

    • Options
    • A. differentiation
    • B. integration
    • C. curve averaging
    • D. linear regression
      • Discuss

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