Thread Starter


Joined Apr 17, 2009
The Boolean function f (w, x, y, z) Ʃ(2, 3, 9, 11, 12, 13, 14, 15) is given.
Realize the function with only a four-to-one (4:1) multiplex!

Please help me with this task i really doesnt know how to solve it.
I did a karudiagram i got: w´x´y+wx+wz dont know if thats needed...

Thanks for help


Joined May 21, 2009
On the multiplexer, you have several signals: 4 input bits, 2 select bits and an output. For these sorts of problems, you have to hard code the input bits and select bits of the multiplexer as either the inputs (W, X, Y, Z) or 0 or 1. I did out the truth table for this function and chose W and X to be my select bits with W as the most significant bit. Comparing with the truth table, I found the input bits, from MSB to LSB, to be 1, Z, 0, Y.

Hope that helped.