nand problem

Discussion in 'Homework Help' started by Wizardi, Mar 27, 2007.

  1. Wizardi

    Thread Starter New Member

    Mar 18, 2007
    5
    0
    having problems getting this equation into nand gates only... I'll type the gates because I don't have any program where I could get the symbols...
    (a1 xnor b1) and (a2 xnor b2) and (a3 xnor b3) and (a4 xnor b4)
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    That instructor of yours really likes NAND gates, don't they? Adimittedly, enough NAND gates can indeed perform any logic function, but I disagree with the notion of their economy.

    Anywhoo, here's a hint from the 'ol Boolean Bag O Tricks:

    A XNOR B = (A NAND (A NAND B)) NAND (B NAND (A NAND B))
     
  3. Wizardi

    Thread Starter New Member

    Mar 18, 2007
    5
    0
    not sure I understand your advice. Looks like one xnor gates turns into 5 nand gates? we have limited supply of gates in our schools laboratory so thats why we have to use nand gates...
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    First convert, then simplify. ;)
     
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