2's complementer using mux

Status
Not open for further replies.
R

research_vlsi

Advanced Member level 4
Joined
Nov 15, 2006
Messages
108
Helped
11
Reputation
22
Reaction score
7
Trophy points
1,298
Activity points
1,902
2 input xor using mux

Hi friends,

To design 4-bit 2's complementer using minimum number of 2:1 Mux.

I tryed and got a result, First I found the boolean equation's using K'Map. The equations are
If A,B,C,D are inputs and W,X,Y,Z are outputs

W=A xor (B+C+D)
X=B xor (C+D)
Y=C xor D
Z= D

After that I implemented these equation using 2:1 mux, I got 5 mux's.

If any body have solution to reduce the no: of mux.ie, below 5 mux.

Regards...
 

mux xor 2:1

hi research_vlsi

can you tell me how to implemented xor use 2:1 mux?

thanks
 

function xor using only 2 to 1 mux

u can design xor by giving the select line of mux as B input of xor and input at '0' pin of mux as A and input at '1' as Abar. Then the complete design is xor using 2:1 mux
 

two 2:1 mux = one xor

hi haneet
whether we need two 2:1 mux to implement xor
one for Abar ?

THANKS
 

xor with 2 2:1 mux

hi addn,
yes u would need two 2:1 mux to implement xor and u hav rightly said one is to implement Abar and other one to implement the function.
 

2 to 1 mux xor

Hi addn & haneet

We can implement XOR using one 2:1 mux. I attached a file...

My question is whether we can reduce the no of mux for 4 bit 2's complementer, I got 5 (2:1) Mux....

Thanks and regards..
 

implement xor function using three 2:1 muxes

A XOR B = A/B +/AB
SEL LINE==A
FOR 0 INPUT GIVE B;(Abar B when a=0 means Abar we should have B so /A.B)
FOR 1 INPUT GIVE /B (ABbar when a=1 means A we should have /B so A/B)

Added after 12 minutes:



Hi, research_vlsi
I too getting the same 5 mux
1 for generating c+d
2 for generating b+c+d
3 for w
4 for x
5 for y
If u get in another way please inform me

Thanks
Regards...[/quote]
 

xor using 2 to 1 mux

research_vlsi
wht u hav drawn is 1 mux and 1 not gate. but when u implement not gate in mux then it is 1 mux. thus, total no. of mux = "2".
i hope u got it. im attaching the diagram.
 

a xor b with two 2-1 muxes

Hi Mr.Vinod

Ya only 5 mux will be used for that function... It is correct I think so..

Also haneet ur logic also fine...

Thanks & Regards
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…