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  • Question

  • 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

  • Correct Answer
  • ?40 dB/decade 

    • Basic Op-Amp Circuits problems

    Search Results

    • 1. 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
    • 2. 

      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
    • 3. 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
    • 4. 

      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
    • 5. If a periodic pulse waveform is applied to an RC differentiating circuit, which two conditions are possible?

    • Options
    • A. tw ≥ 5Τ or tw > 5Τ
    • B. tw = 5Τ or tw > 5Τ
    • C. tw ≤ 5Τ or tw < 5Τ
    • D. tw ≥ 5Τ or tw < 5Τ
      • Discuss
    • 6. 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
      • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. 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

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