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Home ‣ Digital Electronics ‣ Flip-Flops See What Others Are Saying!
  • Question

  • The circuit given below fails to function; the inputs are checked with a logic probe and the following indications are obtained: CLK, J1, J2, J3, K1, K2, and K3 are pulsing. Q and The circuit given below fails to function; the inputs are checked with a logic probe and the followi are HIGH. The circuit given below fails to function; the inputs are checked with a logic probe and the followi and PRE are LOW. What could be causing the problem?

    The circuit given below fails to function; the inputs are checked with a logic probe and the followi


  • Options
  • A. There is no problem.
  • B. The clock should be held HIGH.
  • C. The PRE is stuck LOW.
  • D. The CLR is stuck HIGH.

  • Correct Answer
  • The PRE is stuck LOW. 

    • More questions

    • 1. A NAND gate output is LOW only if all the inputs are HIGH.

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

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. How many select lines would be required for an 8-line-to-1-line multiplexer?

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 8
      • Discuss
    • 4. A(n)________ is not a functional unit of a computer.

    • Options
    • A. input unit
    • B. memory unit
    • C. modem
    • D. control unit
      • Discuss
    • 5. A modulus-12 ring counter requires a minimum of ________.

    • Options
    • A. 10 flip-flops
    • B. 12 flip-flops
    • C. 6 flip-flops
    • D. 2 flip-flops
      • Discuss
    • 6. Which is not characteristic of a shift register?

    • Options
    • A. Serial in/parallel in
    • B. Serial in/parallel out
    • C. Parallel in/serial out
    • D. Parallel in/parallel out
      • Discuss
    • 7. The base of the hexadecimal system is:

    • Options
    • A. eight.
    • B. sixteen.
    • C. ten.
    • D. two.
      • Discuss
    • 8. Hexadecimal is a base 4 numbering system.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. How many inputs must a full-adder have?

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
      • Discuss
    • 10. In a negative logic system, a high is represented by 0.

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

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