Question
You have two counters counting upto 16, built from negedge dff , first circuit is synchronous and second is "ripple" (cascading), which circuit has a less propagation delay? why?

Answers

The synchronous counter will have lesser delay as the input to each flop is readily available before the clock edge. Whereas the cascade counter will take long time as the output of one flop is used as clock to the other. So the delay will be propagating. For E.g.: 16 state counter = 4 bit counter = 4 Flip flops Let 10ns be the delay of each flop The worst case delay of ripple counter = 10 * 4 = 40ns The delay of synchronous counter = 10ns only.(Delay of 1 flop)   Your Comment






Search
Can you Answer!!
  • Q Answering this question with a simple yes will come across as though you are only working for money. If you would retire, what would you do with your time? Travel, volunteer? If you wouldn't retire, explain why.
  • Q Who are included in national development council-
  • Q When a person acts as Governor of more than one State, his / her salary is
  • Q What film was the first sequel to win a Best Picture Oscar?
  • Q What is the use of a array in C?
  • Q What is special about the insat 3d satellite?
  • Q Can you create a class in PHP
  • Q How can we remove unwanted sideband from SSB modulation?
  • Q How do you find inflorescence in Metaxyaceae ?
  • Q Who was the first Australian aborigine to win a gold medal in Olympic games
  • Q DPSP are contained in (OR) Welfare provisions under Indian Constitution are guaranteed under