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Homework Help: A clock counter question

  1. Apr 3, 2008 #1
    i understood that each time a digit complements
    and complements the next digit etc..
    but i cant see how it works
    because if its truee then from the 0000 state
    by one pulse we will have 1111

    i cant ubderstand how we get the numbers between

    here is circuit
  2. jcsd
  3. Apr 3, 2008 #2


    User Avatar

    Staff: Mentor

    No, the first clock pulse increments the first FF 0-->1, then the next clock pulse toggles the output of the first FF 1-->0, and that falling edge is the clock edge to the 2nd FF. So the 2nd clock takes the output from 0001--> 0010.

    The key here is that the output of on FF feeds the next higher significant bit FF. Do you see that now?
  4. Apr 3, 2008 #3
    oohh ok i am starting to see it
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