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  • Question
  • Synchronous (parallel) counters eliminate the delay problems encountered with asynchronous (ripple) counters because the:


  • Options
  • A. input clock pulses are applied only to the first and last stages.
  • B. input clock pulses are applied only to the last stage.
  • C. input clock pulses are applied simultaneously to each stage.
  • D. input clock pulses are not used to activate any of the counter stages.

  • Correct Answer
  • input clock pulses are applied simultaneously to each stage. 


  • Counters problems


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    • 1. A principle regarding most display decoders is that when the correct input is present, the related output will switch:

    • Options
    • A. HIGH
    • B. to high impedance
    • C. to an open
    • D. LOW
    • Discuss
    • 2. A MOD-16 ripple counter is holding the count 10012. What will the count be after 31 clock pulses?

    • Options
    • A. 10002
    • B. 10102
    • C. 10112
    • D. 11012
    • Discuss
    • 3. Once an up-/down-counter begins its count sequence, it cannot be reversed.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. MOD-6 and MOD-12 counters and multiples are most commonly used as:

    • Options
    • A. frequency counters
    • B. multiplexed displays
    • C. digital clocks
    • D. power consumption meters
    • Discuss
    • 5. How many different states does a 3-bit asynchronous counter have?

    • Options
    • A. 2
    • B. 4
    • C. 8
    • D. 16
    • Discuss
    • 6. What function will the counter shown below be performing during period "B" on the timing diagram?


    • Options
    • A. Counting up
    • B. Counting down
    • C. Inhibited
    • D. Loading
    • Discuss
    • 7. Any divide-by-N counter can be formed by using external gating to ________ at a predetermined number.

    • Options
    • A. HIGH
    • B. reset
    • C. LOW
    • D. preset
    • Discuss
    • 8. The terminal count of a modulus-11 binary counter is ________.

    • Options
    • A. 1010
    • B. 1000
    • C. 1001
    • D. 1100
    • Discuss
    • 9. Which of the following is an example of a counter with a truncated modulus?

    • Options
    • A. 8
    • B. 13
    • C. 16
    • D. 32
    • Discuss
    • 10. Which of the following procedures could be used to check the parallel loading feature of a counter?

    • Options
    • A. Preset the LOAD inputs, set the CLR to its active level, and check to see that the Q outputs match the values preset into the LOAD inputs.
    • B. Apply LOWs to the parallel DATA inputs, pulse the CLK input, and check for LOWs on all the Q outputs.
    • C. Apply HIGHs to all the DATA inputs, pulse the CLK and CLR inputs, and check to be sure that the Q outputs are all LOW.
    • D. Apply HIGHs to all the Q terminals, pulse the CLK, and check to see if the DATA terminals now match the Q outputs.
    • Discuss


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