Discussion in 'Homework Help' started by alien53, Oct 9, 2010.

1. ### alien53 Thread Starter New Member

Oct 9, 2010
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0
So I've been pretty much staring at this all night and I honestly have no clue as to what to do. I have attached the problem, so if someone could help out or just point me in the right direction, it would be greatly appreciated.

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2. ### Georacer Moderator

Nov 25, 2009
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Do you have any knowledge on building logic functions with MUXes?

If so, did you notice that the function you want to build is comprised by a sum of terms that consist of an expression multiplied by all the permutations of A and B?

In general, when you see an expression of the type X*A+X'*B, that can be build by giving X at the MUX's select and A and B in their respective inputs. In the same logic, for an expression X'Y'*A+X'Y*B+XY'*C+XY*D, X and Y are the select variables and A,B,C,D are the inputs.

Can you use that to build the function given?

I admit that I simplified a little C and D epxressions in brackets in order to get rid of the small MUXes. I built the whole function using only the big MUX.

It was an interesting exercise all in all.