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Analysing flip-flops

  1. Nov 13, 2009 #1
    Hi,

    Im trying to analyse this counter
    http://img509.imageshack.us/img509/113/pngimg1.png [Broken]

    And my conclusion is that it has a very strange sequence
    from state 000 ->100 ->100 and back again to 100....

    I just wanted to check with you if that's correct.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Nov 14, 2009 #2

    LCKurtz

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    What is the 1T input? Is it the D input on a D flip-flop or the J input on a JK flip-flop or something different? And is the picture correct with neither the Q0 or Q1 outputs connected to anything?
     
    Last edited by a moderator: May 4, 2017
  4. Nov 16, 2009 #3
    Hi, they are T flip-flops, and yes the picture is correct with neither the q0 nor q1 connected to anything.
     
  5. Nov 16, 2009 #4

    LCKurtz

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    I don't think your sequence can be correct. One thing for sure is that Q2 will toggle on every clock pulse which your sequence doesn't do. And Q0 won't change from whatever its starting state is. You just have to figure out Q1 knowing its T input is Q2. I get a repeating pattern of 4 independent of what Q0 is.
     
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