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Home ‣ Digital Electronics ‣ Describing Logic Circuits See What Others Are Saying!
  • Question

  • The effect of an inverted output being connected to the inverting input of another gate is to effectively eliminate one of the inversions, resulting in a single inversion.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • More questions

    • 1. The delay between a change on the digital input of a DAC and the appearance of the change on the output is called settling time.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. An invalid condition in the operation of an active-HIGH input S-R latch occurs when ________.

    • Options
    • A. HIGHs are applied simultaneously to both inputs S and R
    • B. LOWs are applied simultaneously to both inputs S and R
    • C. a LOW is applied to the S input while a HIGH is applied to the R input
    • D. a HIGH is applied to the S input while a LOW is applied to the R input
      • Discuss
    • 3. The term buffer/driver signifies the ability to provide low output currents to drive light loads.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The time needed for an output to change from the result of an input change is known as:

    • Options
    • A. noise immunity
    • B. fan-out
    • C. propagation delay
    • D. rise time
      • Discuss
    • 5. Why are the maximum value of VOL and the minimum value of VOH used to determine the noise margin rather than the typical values for these parameters?

    • Options
    • A. These are worst-case conditions.
    • B. These are normal conditions.
    • C. These are best-case conditions.
    • D. It doesn't matter what values are used.
      • Discuss
    • 6. Which of the following is correct for a gated D flip-flop?

    • Options
    • A. The output toggles if one of the inputs is held HIGH.
    • B. Only one of the inputs can be HIGH at a time.
    • C. The output complement follows the input when enabled.
    • D. Q output follows the input D when the enable is HIGH.
      • Discuss
    • 7. Data transfer from I/O to external data memory can only be done with the MOV command.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. A 64-bit word consists of ________.

    • Options
    • A. 4 bytes
    • B. 8 bytes
    • C. 10 bytes
    • D. 12 bytes
      • Discuss
    • 9. What is the difference between a 7490 and a 7492?

    • Options
    • A. 7490 is a MOD-12, 7492 is a MOD-10
    • B. 7490 is a MOD-12, 7492 is a MOD-16
    • C. 7490 is a MOD-16, 7492 is a MOD-10
    • D. 7490 is a MOD-10, 7492 is a MOD-12
      • Discuss
    • 10. A data acquisition system may communicate via two common buses: the data bus and the control bus.

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

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