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

  • Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be


  • Options
  • A. Acl < 3
  • B. Acl > 3
  • C. 0
  • D. Acl ≅ 1

  • Correct Answer
  • Acl > 3 

    • Basic Op-Amp Circuits problems

    Search Results

    • 1. A two-pole high-pass active filter would have a roll-off rate of

    • Options
    • A. 40 dB/decade
    • B. ?40 dB/decade
    • C. 20 dB/decade
    • D. ?20 dB/decade
      • Discuss
    • 2. A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)

    • Options
    • A. differentiator
    • B. amplifier
    • C. integrator
    • D. multivibrator
      • Discuss
    • 3. 

      What has the voltage across the resistor decayed to by the end of the pulse in the given circuit?


    • Options
    • A. 0 V
    • B. 0.75 V
    • C. 5.55 V
    • D. 14.25 V
      • Discuss
    • 4. An RL integrator and an RC differentiator can act as what types of filters, respectively?

    • Options
    • A. low-pass, low-pass
    • B. low-pass, high-pass
    • C. high-pass, high-pass
    • D. high-pass, low-pass
      • Discuss
    • 5. 

      How long will it take the capacitor in the given circuit to discharge?


    • Options
    • A. 16.4 µs
    • B. 32.8 µs
    • C. 65.6 µs
    • D. 82 µs
      • Discuss
    • 6. If the input to a comparator is a sine wave, the output is a

    • Options
    • A. ramp voltage
    • B. sine wave
    • C. rectangular wave
    • D. sawtooth wave
      • Discuss
    • 7. A zero-level detector is a

    • Options
    • A. comparator with a sine-wave output
    • B. comparator with a trip point referenced to zero
    • C. peak detector
    • D. limiter
      • Discuss
    • 8. The formula shows that for a given capacitor, if the voltage changes at a constant rate with respect to time, the current will

    • Options
    • A. increase
    • B. decrease
    • C. be constant
    • D. decrease logarithmically
      • Discuss
    • 9. The center frequency of a band-pass filter is always equal to the

    • Options
    • A. bandwidth
    • B. ?3 dB frequency
    • C. bandwidth divided by Q
    • D. geometric average of the critical frequencies
      • Discuss
    • 10. If the value of resistor Rf 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

    • Options
    • 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
      • Discuss

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