How do I implement an 8-1 multiplexer in a full adder?

Thread Starter


Joined Jul 24, 2006

I am having trouble with the following question :

Implement a full adder using two 8-to-1 MUXes. Connect X,Y, and Cin to the control inputs of the MUXes and connect 1 or 0 to each data input.

Do I need to wire the two muxes to a full adder circuit or do I need to make a full adder out of two multiplexers?

Any help would be greatly appreciated



Joined Oct 14, 2005
You need to implement the full adder by using the two muxes, not just wiring the muxes to a full adder. If you need a hint on how to achieve this, think of a full adder truth table, mapped to the muxes input and the correct output values are selected by three control lines, which are mapped full adder input.


Joined Apr 2, 2007
Am I having a problem viewing the image or is the image supposed to be blank, which would make a perfect sense in this case as well?
or we can make it look the same as "the king is not wearing any clothes".:D
at first i was expecting something in it:(:p

(btw, its blank or r we both r not lucky enuf to be able to see it;))

for the question: read the first reply to the op and ask any doubts u may have.