how can i convert this..??(logic circuit)

Discussion in 'Homework Help' started by shimene03, Jul 28, 2010.

  1. shimene03

    Thread Starter New Member

    Jul 27, 2010
    4
    0
    how can i make a code conversion..

    8 4 -2 -1 to Excess 4 to BCD

    please help....to make a truth table of this.......

    thx....:):):)
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. shimene03

    Thread Starter New Member

    Jul 27, 2010
    4
    0
    no,it have a negative 2 and 1..,

    i make a truth table of this......im not sure if its correct....

    8 4 -2 -1 >>> Excess 4 >>> BCD
    ..............16 8 4 2 1
    0 0 0 0.... 0 0 1 0 0
    0 0 1 1.... 0 0 1 1 1
    0 1 1 0.... 0 1 0 1 0
    0 1 0 1.... 0 1 0 0 1
    0 1 0 0.... 0 1 0 0 0
    1 0 1 1.... 0 1 0 1 1
    1 0 1 0.... 0 1 1 1 0
    1 0 0 1.... 0 1 1 0 1
    1 0 0 0.... 0 1 1 0 0
    1 1 1 1.... 1 0 0 1 1
    1 1 1 0.... 1 0 0 1 0
    1 1 0 1.... 1 0 0 0 1
    1 1 0 0.... 1 0 0 0 0


    8 4 -2 -1 to excess 4....????that is correct???
     
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