Suvarna Gadde

 Profile Answers by Suvarna Gadde 

• Dec 8th, 2010

 

To design the XOR using 2:1 mux, we need to tie the “Zeroth” input of mux to one of the input of XOR and another input of MUX to the inverted of first input. The another input of XOR gate would be applied to the select line of the MUX.

Now, the output of the MUX would be AB’ + A’B which is as same as the output of XOR Gate.

uzipereg

 Profile Answers by uzipereg 

• Jul 30th, 2011

 

A xor B= A'B + AB'

hence, if A=0, then the output is B
if A=1, then the output is B'

so we need only ONE mux (2:1), which is controlled by A, and its inputs are B --> mux_in_0
B' --> mux_in_1