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Home ‣ Digital Electronics ‣ Flip-Flops Comments
  • Question

  • When using edge-triggered flip-flops, the data is entered into the flip-flop on the leading edge of the clock, but the output does not change until the trailing edge of the clock.


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  • A. True
  • B. False

  • Correct Answer
  • False 

    • Flip-Flops problems

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    • 1. A one-shot is a special type of multivibrator that must be triggered to produce each output pulse.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A latch can act as a contact-bounce eliminator.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Pulse-triggered or level-triggered devices are the same.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A TOGGLE input to a J-K flip-flop causes the Q and outputs to switch to their opposite state.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The propagation delay time tPLH is measured from the triggering edge of the clock pulse to the LOW-to-HIGH transition of the output.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. In VHDL, each instance of a component is given a name followed by a semicolon and the name of the library primitive.

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    • A. True
    • B. False
      • Discuss
    • 7. PRESET and CLEAR inputs are normally synchronous.

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    • A. True
    • B. False
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    • 8. Edge-triggered flip-flops can be identified by the triangle on the clock input.

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    • A. True
    • B. False
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    • 9. A J-K flip-flop and associated waveforms are shown below. The circuit is operating properly.


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    • A. True
    • B. False
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    • 10. A D-type latch is able to change states and "follow" the D input regardless of the level of the ENABLE input.

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    • A. True
    • B. False
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