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Homework Help: Determine the Main Cycle of a Counter (JK flip-flops)

  1. Sep 22, 2013 #1
    The problem statement, all variables and given/known data
    For the counter shown below, determine the main cycle, and for each of the unused states, show what happens if it starts up there.


    Relevant equations

    The attempt at a solution
    Based on the diagram in the link I provided, I know that:

    JA = QB'
    KA = 1
    JB = QC'
    KB = QC
    JC = QA
    KC = QA

    The problem is I do not know what to do after that. Can anyone explain to me how to do this? Thanks.
  2. jcsd
  3. Sep 23, 2013 #2


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    2017 Award

    Staff: Mentor

    Do you know how a JK flip-flop works?

    What happens if A,B,C are active and we get the next clock cycle?
    What happens if A,B,C' are active?
    What happens for all other combinations?
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