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Homework Statement
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Impliment the expression which is already in minimum sum of products form using only two-input NAND gates. No gate may be used as a NOT. All inputs are available both uncomplemented and complemented. (The number of gates required is shown in parentheses.)
f = ab'd' + bde' + bc'd + a'ce (10 gates)
Homework Equations
(ab)' = a' + b'
(a')' = a
(a+b) = a'b'
The Attempt at a Solution
first my idea was to try and work in reverse by imagining that the end result had come out of a NAND gate and then getting an idea of what the inputs might be. I spend a lot of time on that and gave up because I wasn't going to have the right number of gates.
second idea. I tried to manipulate the original equation by hand to see if i could toggle any variables or do anything that would help me. I gave up on that because I couldn't get a grasp on what exactly I was doing.
third idea. I first tried drawing the equation with AND and NOT gates and then tried to convert them to only NAND gates but I just keep getting lost.
During this time I've tried to use my textbook, but it doesn't have a good example with all these restrictions that I have to implement.
I wouldn't mind putting some more effort into some method or even something I've already tried if I had some direction as to how to go about solving something like this.
Thanks
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