How to Implement F1 and F2 Using an 8:1 MUX?

[MagLok]

Homework Statement

F1 = AB + AC + BC
F2 = (A + C’ + D’)(B + C + D)(A + B’ + C)

2) Draw the 8-to-1 MUX implementation of F1 and F2; show your work.

I understand doing a 4:1 of one function, but how do you do an 8:1 with two functions?

 

[rootX]

Homework Statement

F1 = AB + AC + BC
F2 = (A + C’ + D’)(B + C + D)(A + B’ + C)

2) Draw the 8-to-1 MUX implementation of F1 and F2; show your work.

I understand doing a 4:1 of one function, but how do you do an 8:1 with two functions?

put three select signals at the top: A,B,C
F1 would take only 1,0s for each output
and for F2, you would need some of inputs in terms of D

 

[MagLok]

Alright, let me try it and see. the method that I've used for 4:1 is draw the k-map (2 rows, 4 columns) and then derive the mux from that, is this a similar method? I'm assuming so and that's what I'll try again. Thanks for the quick response by the way.

-Mikael

 

[MagLok]

Alright, here's what I got and I'm pretty sure it's wrong (see the note..the MUX I drew is essentially the MUX for F2, and I'm not sure about what to do with the final value relationship between F1(4) and F1(7)

Thanks again in advance,

-Mikael

Edit: I should probably post a link to my work huh :-) http://img510.imageshack.us/img510/227/1331013oi1.jpg Thanks again