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How to determine a characteristic table and design a frequecy divider

  1. Mar 31, 2009 #1
    How do you determine a characteristic table with the given D-Flip Flop equation
    Q+ = X.Q + X'. Q'

    Also how do you use this flip flop and design a frequency divider. I am not really clear on these concepts. Can anyone help? I have attached my design of the circuit.
     

    Attached Files:

  2. jcsd
  3. Mar 31, 2009 #2
    Your inputs from the equation are X and Q so start with them
    XQ
    00
    01
    10
    11

    from this we fill out X' and Q'
    X'Q'
    11
    10
    01
    00

    using these columns solve Q+
    for example the first part XQ = 0 0 = 0
    the second part X'Q' = 1 1 = 1
    0 or 1 = 1 therefore Q+ = 1

    creating the characteristic table
    X Q X' Q' Q+
    __________
    0 0 1 1 1
    0 1 1 0 0
    1 0 0 1 0
    1 1 0 0 1

    make sense ???
     
  4. Apr 1, 2009 #3
    Thank you that does help clear it up a lot! Now how do I design the frequency divider. I am not clear on how the frequency divider works can you help clarify?
     
    Last edited: Apr 1, 2009
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