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Home Digital Electronics Multivibrators and 555 Timer See What Others Are Saying!
  • Question
  • What is the duty cycle of the waveform at the output of the circuit given below?

    What is the duty cycle of the waveform at the output of the circuit given below? 78% 56% 50% 44%


  • Options
  • A. 78%
  • B. 56%
  • C. 50%
  • D. 44%

  • Correct Answer
  • 56% 


  • More questions

    • 1. The noise immunity of a logic circuit refers to the circuit's ability to tolerate noise by causing spurious charges in the output voltage.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The main advantage of bipolar (TTL) memories over MOS memories is speed.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. A very critical dimension in project management is ________.

    • Options
    • A. cost
    • B. skill
    • C. time
    • D. personnel
    • Discuss
    • 4. A counter-ramp ADC stops counting when ________.

    • Options
    • A. the input voltage equals the DAC staircase voltage
    • B. the counter reaches a maximum count
    • C. the input voltage equals 5 volts
    • D. the DAC staircase voltage equals 5 volts
    • Discuss
    • 5. With regard to a D latch, ________.

    • Options
    • A. the Q output follows the D input when EN is LOW
    • B. the Q output is opposite the D input when EN is LOW
    • C. the Q output follows the D input when EN is HIGH
    • D. the Q output is HIGH regardless of EN's input state
    • Discuss
    • 6. The device shown in the given figure is checked with a logic probe and the output is HIGH.


    • Options
    • A. The device is working properly.
    • B. For the input conditions shown the output should be LOW; the input is shorted to ground.
    • C. For the input conditions shown the output should be neither HIGH nor LOW; the device is shorted to .
    • D. The device is probably alright; the problem is most likely caused by the stage connected to the output of the device.
    • Discuss
    • 7. What is the current in R1 and the current in R2 for the circuit shown below?


    • Options
    • A. I1 = 0.416 mA, I2 = 0.416 mA
    • B. I1 = 0.357 mA, I2 = 0.357 mA
    • C. I1 = 1.25 mA, I2 = 0.625 mA
    • D. I1 = 0.625 mA, I2 = 1.25 mA
    • Discuss
    • 8. Referring to the given figure, what should the display on the scope look like if the A/D converter is working properly?


    • Options
    • A. It should be a circular Lissajous pattern resulting from the simultaneous application of ramps to the vertical and horizontal inputs of the oscilloscope.
    • B. The pattern should be a straight line across the screen due to the equal but opposite voltages being applied to the scope inputs.
    • C. A uniform stairstep pattern should be displayed.
    • D. The scope should display a sequential binary count with the LSB on the left and the MSB on the right side of the display.
    • Discuss
    • 9. Referring to the given figure, what appears to be wrong, if anything, with the output of the D/A converter?


    • Options
    • A. The input signal is probably noisy.
    • B. There appears to be some nonlinearity in the scope display.
    • C. The converter has a nonmonotonic output error.
    • D. It appears that certain input codes are incorrect; double-check the input coding.
    • Discuss
    • 10. What is the output voltage of the given circuit if the inputs are as follows:
      20 = 1, 21 = 1, 22 = 0, 23 = 0?


    • Options
    • A. ?3.115 volts
    • B. ?2.8025 volts
    • C. ?1.875 volts
    • D. ?1.24 volts
    • Discuss


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