Flip Flop Characteristic Equations

Discussion in 'Homework Help' started by n0th1n2b3sa1d, May 27, 2009.

  1. n0th1n2b3sa1d

    Thread Starter New Member

    May 27, 2009
    4
    0
    An easy one.

    I just try to understand how I can write a flip flop's characteristic equation with using its characteristic table ?

    Could you explain how can i implement J K flip flop characteristic equation, with using J K flip flop characteristic table ?

    http://faculty.kfupm.edu.sa/COE/ash.../COE022_200/Chapter4_1_files/jk-flip-flop.gif


    My major job is about implementing the characteristic equations of custom(user defined) flip flops, whose characteristic table is given. I thought that J K ff would be a good example for me.

    Thanks.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Do you mean a truth table? Could you explain what you mean by -
     
  3. n0th1n2b3sa1d

    Thread Starter New Member

    May 27, 2009
    4
    0
    for example i have a 2 input flip flop which is states are :
    when 1, 1 = set state;
    when 1, 0 = reset state;
    when 0, 1 = complement;
    when 0, 0 = no change.

    i can draw its characteristic table, but i don't know how to get characteristic equation from its characteristic table.
     
  4. n0th1n2b3sa1d

    Thread Starter New Member

    May 27, 2009
    4
    0
    By the way, yes. I meant the truth table, which belongs to characteristic equation.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You may notice that there is also a clock input involved. Your typical J - K flip flop does not operate according to you table. You will need some external gates to control the J and K inputs so the flip flop will act as you wish.

    Look up the data sheet for a 74XX73 to see how a J - K operates.
     
  6. n0th1n2b3sa1d

    Thread Starter New Member

    May 27, 2009
    4
    0
    thank you.
     
Loading...