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CuriousTab

Counters problems


  • 1. A 5-bit asynchronous binary counter is made up of five flip-flops, each with a 12 ns propagation delay. The total propagation delay (tp(tot)) is ________.

  • Options
  • A. 12 ms
  • B. 24 ns
  • C. 48 ns
  • D. 60 ns
  • Discuss
  • 2. Integrated-circuit counter chips are used in numerous applications including:

  • Options
  • A. timing operations, counting operations, sequencing, and frequency multiplication
  • B. timing operations, counting operations, sequencing, and frequency division
  • C. timing operations, decoding operations, sequencing, and frequency multiplication
  • D. data generation, counting operations, sequencing, and frequency multiplication
  • Discuss
  • 3. Which of the following is an invalid state in an 8421 BCD counter?

  • Options
  • A. 0011
  • B. 1001
  • C. 1000
  • D. 1100
  • Discuss
  • 4. A counter with a modulus of 16 acts as a ________.

  • Options
  • A. divide-by-8 counter
  • B. divide-by-16 counter
  • C. divide-by-32 counter
  • D. divide-by-64 counter
  • Discuss
  • 5. Four cascaded modulus-10 counters have an overall modulus of ________.

  • Options
  • A. 10
  • B. 100
  • C. 1,000
  • D. 10,000
  • Discuss
  • 6. Using four cascaded counters with a total of 16 bits, how many states must be deleted to achieve a modulus of 50,000?

  • Options
  • A. 50,000
  • B. 65,536
  • C. 25,536
  • D. 15,536
  • Discuss
  • 7. What type of device is shown below?

    Digital Electronics Counters: What type of device is shown below?


  • Options
  • A. 4-bit bidirectional universal shift register
  • B. Parallel in/parallel out shift register with bidirectional data flow
  • C. 2-way parallel in/serial out bidirectional register
  • D. 2-bit serial in/4-bit parallel out bidirectional shift register
  • Discuss
  • 8. After 10 clock cycles, and assuming that the DATA input had returned to 0 following the storage sequence, what values would be stored in Q4, Q3, Q2, Q1, Q0 of the register in Figure 7-5?

  • Options
  • A. 0,1,0,1,1
  • B. 1,1,0,1,0
  • C. 1,0,1,0,1
  • D. 0,0,0,0,0
  • Discuss
  • 9. A four-channel scope is used to check the counter in the figure given below. Are the displayed waveforms correct?

    Digital Electronics Counters: A four-channel scope is used to check the counter in the figure given below. Are the displayed wavef


  • Options
  • A. Yes
  • B. No
  • Discuss
  • 10. Three cascaded modulus-5 counters have an overall modulus of ________.

  • Options
  • A. 5
  • B. 25
  • C. 125
  • D. 500
  • Discuss

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