logo

CuriousTab




Buy on Amazon
Counters (Digital Electronics) Question and Answers-Page first

Counters problems


Share: 
  • 1. What is the difference between a 7490 and a 7492?

  • Options
  • A. 7490 is a MOD-12, 7492 is a MOD-10
  • B. 7490 is a MOD-12, 7492 is a MOD-16
  • C. 7490 is a MOD-16, 7492 is a MOD-10
  • D. 7490 is a MOD-10, 7492 is a MOD-12

  •           Discuss     

  • 2. List the state of each output pin of a 7447 if RBI = 0, LT = 1, A0 = 1, A1 = 0, A2 = 0, and A3 = 1.

  • Options
  • A. RBO = 0, a = 0, b = 0, c = 0, d = 1, e = 1, f = 0, g = 0
  • B. RBO = 1, a = 0, b = 0, c = 0, d = 1, e = 1, f = 0, g = 0
  • C. RBO = 0, a = 0, b = 0, c = 0, d = 0, e = 1, f = 0, g = 0
  • D. RBO = 1, a = 0, b = 0, c = 0, d = 0, e = 1, f = 0, g = 0

  •           Discuss     

  • 3. The hexadecimal equivalent of 15,536 is ________.

  • Options
  • A. 3CB0
  • B. 3C66
  • C. 63C0
  • D. 6300

  •           Discuss     

  • 4. Referring to the given figure, at which point is the serial data transferred to the parallel output?

    Digital Electronics Counters: Referring to the given figure, at which point is the serial data transferred to the parallel output?


  • Options
  • A. W
  • B. X
  • C. Y
  • D. Z

  •           Discuss     

  • 5. Three cascaded decade counters will divide the input frequency by ________.

  • Options
  • A. 10
  • B. 20
  • C. 100
  • D. 1,000

  •           Discuss     

  • 6. The terminal count of a 3-bit binary counter in the DOWN mode is ________.

  • Options
  • A. 000
  • B. 111
  • C. 101
  • D. 010

  •           Discuss     

  • 7. For a one-shot application, how can HDL code be used to make a circuit respond once to each positive transition on its trigger input?

  • Options
  • A. By using a counter
  • B. By using an active clock
  • C. By using an immediate reload
  • D. By using edge trapping

  •           Discuss     

  • 8. One of the major drawbacks to the use of asynchronous counters is:

  • Options
  • A. low-frequency applications are limited because of internal propagation delays
  • B. high-frequency applications are limited because of internal propagation delays
  • C. asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications
  • D. asynchronous counters do not have propagation delays and this limits their use in high-frequency applications

  •           Discuss     

  • 9. When two counters are cascaded, the overall MOD number is equal to the ________ of their individual MOD numbers.

  • Options
  • A. product
  • B. sum
  • C. log
  • D. reciprocal

  •           Discuss     

  • 10. A 4-bit ripple counter consists of flip-flops, which each have a propagation delay from clock to Q output of 15 ns. For the counter to recycle from 1111 to 0000, it takes a total of ________.

  • Options
  • A. 15 ns
  • B. 30 ns
  • C. 45 ns
  • D. 60 ns

  •           Discuss     


First 2 3 4 ... 9 .. 15 16 Last