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Homework Help: Digital Design

  1. Dec 1, 2009 #1
    1. The problem statement, all variables and given/known data
    1. Implement the following Boolean function F using no more than two NOR gates and draw the circuit.F(A,B,C,D)=∑(0,1,2,9,11)+d(8,10,14,15)
    2. Implement the following Boolean function using two - level forms:
    NAND - AND
    OR - NAND and
    2. Relevant equations

    3. The attempt at a solution
    The first one is kinda easy but I didn't what's the meaning of d.
    The second one I'm actually Confused about the solution .First one is I draw NAND then AND
    is this correct.
  2. jcsd
  3. Dec 1, 2009 #2
    The d means does not matter. So that values of 8, 10, 14 and 15 can be either 1 or 0, whichever gives the neatest solution. I'm unsure about the second part, sorry.
  4. Dec 3, 2009 #3
    Thank you for replying .Now,I know 'd' what's mean it's don't care .
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