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Home ‣ Digital Electronics ‣ Flip-Flops Comments
  • Question

  • The 555 timer can be used in either the astable or monostable modes.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Flip-Flops problems

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    • 1. Simple gate circuits, combinational logic, and transparent S-R flip-flops are synchronous.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Multivibrators must be level-triggered.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A flip-flop's normal starting state when power is first applied to a circuit is always the SET state.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Using knowledge from previous chapters, an S-R flip-flop circuit is easy to design.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The gated S-R flip-flop is asynchronous.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The Q output of a flip-flop is normally HIGH when the device is in the "CLEAR" or "RESET" state.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The S-R flip-flop has no invalid or unused state.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. A one-shot circuit is also known as a timer.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Generally, a flip-flop's hold time is short enough so that its output will go to a state determined by the logic levels present at its synchronous control inputs just prior to the active clock transition.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Inputs that cause the output of a flip-flop to change instantaneously are asynchronous.

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

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