# DLD

Discussion in 'Homework Help' started by Zoro, Oct 8, 2013.

1. ### Zoro Thread Starter New Member

Oct 8, 2013
2
0
Hi... i need your help urgently... can anyone tell me how to implement full adder circuit using two (4x1) multiplexer????

2. ### Papabravo Expert

Feb 24, 2006
11,703
2,464
You start by writing the Boolean Equations for a full adder. There are three inputs and two outputs.

3. ### Zoro Thread Starter New Member

Oct 8, 2013
2
0
I know how to implement it using boolean algebra but i want to know how am i supposed to make full adder circuit using two (4x1) multiplexer....
i want to know how to make two (4x1) multiplexer circuit...

4. ### WBahn Moderator

Mar 31, 2012
23,089
6,941
Since you haven't shown any attempt to work YOUR homework problem, we have to start with basics. So,

Start by writing the Boolean equations for a full adder.

Then write the Boolean equation for a 4:1 multiplexer.

5. ### Papabravo Expert

Feb 24, 2006
11,703
2,464
Once you have the Boolean equations for the full adder you can wire the inputs to produce a 1 or a 0. Now what should you do with the select lines?