Hello Everyone,

I have
4 Inputs A,B,C,D and outputs is high for (0,3,6,9,12).

I found the truth table and I now have to plot a two level of 4x1 MUX

I have trouble to do it :0

I know how to do it using only one MUX but now I am really struggling

Thanks for your answer and help

Nori

 

I take it you will use 2 4x1 MUXs for the first level and another 2x1 MUX for the final selection.

Break your truth table in rows of 8. That will result in 2 separate tables. Use only the columns B,C and D to produce a partial solution of the problem. That way you will have a result that is valid only if A=0 and another that stands when A=1.

Use the 2x1 MUX controlled by the input A to filter the two results. Presto! You have your result.