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  • Question
  • The terminal count of a typical modulus-10 binary counter is ________.


  • Options
  • A. 0000
  • B. 1010
  • C. 1001
  • D. 1111

  • Correct Answer
  • 1001 


  • Counters problems


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    • 1. Why can a synchronous counter operate at a higher frequency than a ripple counter?

    • Options
    • A. The flip-flops change one after the other.
    • B. The flip-flops change at the same time.
    • C. A synchronous counter cannot operate at higher frequencies.
    • D. A ripple counter is faster.
    • Discuss
    • 2. A modulus-10 counter must have ________.

    • Options
    • A. 10 flip-flops
    • B. flip-flops
    • C. 2 flip-flops
    • D. synchronous clocking
    • Discuss
    • 3. How can a digital one-shot be implemented using HDL?

    • Options
    • A. By using a resistor and a capacitor
    • B. By applying the concept of a counter
    • C. By using a library function
    • D. By applying a level trigger
    • Discuss
    • 4. Which of the following is an invalid output state for an 8421 BCD counter?

    • Options
    • A. 1110
    • B. 0000
    • C. 0010
    • D. 0001
    • Discuss
    • 5. Which of the following statements best describes the operation of a synchronous up-/down-counter?

    • Options
    • A. The counter can count in either direction, but must continue in that direction once started.
    • B. The counter can be reversed, but must be reset before counting in the other direction.
    • C. In general, the counter can be reversed at any point in its counting sequence.
    • D. The count sequence cannot be reversed, once it has begun, without first resetting the counter to zero.
    • Discuss
    • 6. What is the difference between combinational logic and sequential logic?

    • Options
    • A. Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
    • B. Combinational and sequential circuits are both triggered by timing pulses.
    • C. Neither circuit is triggered by timing pulses.
    • Discuss
    • 7. The parallel outputs of a counter circuit represent the:

    • Options
    • A. parallel data word
    • B. clock frequency
    • C. counter modulus
    • D. clock count
    • Discuss
    • 8. Which of the following statements are true?

    • Options
    • A. Asynchronous events do not occur at the same time.
    • B. Asynchronous events are controlled by a clock.
    • C. Synchronous events do not need a clock to control them.
    • D. Only asynchronous events need a control clock.
    • Discuss
    • 9. Which is not an example of a truncated modulus?

    • Options
    • A. 8
    • B. 9
    • C. 11
    • D. 15
    • Discuss
    • 10. What is the maximum delay that can occur if four flip-flops are connected as a ripple counter and each flip-flop has propagation delays of tPHL = 22 ns and tPLH = 15 ns?

    • Options
    • A. 15 ns
    • B. 22 ns
    • C. 60 ns
    • D. 88 ns
    • Discuss


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