- 15th May 2008, 04:46 #1

- Join Date
- Nov 2007
- Posts
- 263
- Helped
- 19 / 19
- Points
- 2,981
- Level
- 12

## not gate using mux

Can anyone send me a material on NOT ,AND ,XOR,XNOR,NAND,INVERTER using MUX ???

Plz its urgent send me a material i will give u 20 points

- 15th May 2008, 04:46

- 15th May 2008, 05:47 #2

- Join Date
- Mar 2008
- Location
- Hyderabad, India
- Posts
- 23
- Helped
- 10 / 10
- Points
- 1,316
- Level
- 8

## nand using mux

Realization of GATE USING MUX

If any one finds wrong in this reply me

If u other design share with us

with regards

khalandar basha

basha_vlsi@yahoo.co.in[/img]

8 members found this post helpful.

- 15th May 2008, 06:47 #3

- Join Date
- Nov 2007
- Posts
- 263
- Helped
- 19 / 19
- Points
- 2,981
- Level
- 12

## mux as inverter

thanks

2 members found this post helpful.

- 15th May 2008, 06:53 #4

- Join Date
- Jan 2007
- Posts
- 208
- Helped
- 27 / 27
- Points
- 4,334
- Level
- 15

## mux logic gates

hii basha u missed Nor gate

2 members found this post helpful.

- 15th May 2008, 07:01 #5

- Join Date
- Mar 2008
- Location
- Hyderabad, India
- Posts
- 23
- Helped
- 10 / 10
- Points
- 1,316
- Level
- 8

## inverter using mux

hi vlsi technolgy

i hope i designed not gate correctly.

hi venkat_kvr

as he didn't mentioned abt nor gate i didn't draw

and ur's design for nor gate is correct yaar

and thanks for helping out

- 15th May 2008, 08:08 #6

- Join Date
- Feb 2007
- Posts
- 97
- Helped
- 7 / 7
- Points
- 1,509
- Level
- 8

## nand inverter

Sorry but really i cant realize what is the advantage of using mux to design those logic gate ? With respect to digital, again you have to use gates to build mux, and with respect to analog surely the number of transistor you are going to use to build a logic gate by mux will more than the no you have to spend to directly build a gate.

Those above designs are effective in which aspect ? Resolution ( i mean true replica of output waveform ) ?

- 15th May 2008, 08:08

- 15th May 2008, 08:59 #7

- Join Date
- Feb 2008
- Location
- At home
- Posts
- 1,166
- Helped
- 119 / 119
- Points
- 7,421
- Level
- 20

## xnor using nand

Originally Posted by**atena**

- 15th May 2008, 08:59

- 19th May 2008, 16:25 #8

- Join Date
- May 2008
- Location
- Munich, Germany
- Posts
- 74
- Helped
- 15 / 15
- Points
- 1,349
- Level
- 8

## instrucciones nor, xor, and,in, out, not

Originally Posted by**AdvaRes**

Some designers like to combine muxes as spare cells. If in later stage you need to add logic, you gotta be able to generate your logic from mux structures. Therefore understanding these implementations is important.

Actually one can also use muxes to create memory elements like latches and flip flops. One of my blog posts dealt exactly with that issue, check it out here:

http://asicdigitaldesign.wordpress.c...-10-mux-logic/

hope this helps,

ND.

2 members found this post helpful.

- 17th January 2009, 21:08 #9

- Join Date
- Jan 2009
- Posts
- 1
- Helped
- 1 / 1
- Points
- 703
- Level
- 5

## mux nand

thanks a lot..

1 members found this post helpful.

- 21st January 2009, 10:49 #10
## implement or gate and and gate using mux

I feel we should not mix the advantage of implementation of logic in CMOS comparing the same with implementation of logic using gates.

**Each has its own importance**. The simple implementation of logic using gates (as we realize mux logic using gates) helps a clearer understanding while the reduced implementation in CMOS provides faster operation (in ns) and smaller area too by reducing the transistor count. Finally it is a logic equation which is being realized.

Just imagine the no. of transistors required to implement XOR gate using individual gates and then using mux ... the difference is clearly visible.

Regards,

Anuj.

- 21st January 2009, 12:35 #11

- Join Date
- Feb 2008
- Location
- At home
- Posts
- 1,166
- Helped
- 119 / 119
- Points
- 7,421
- Level
- 20

## how to use a mux as an inverter

Originally Posted by**anuj.joamon**

- 12th October 2009, 03:02 #12

- Join Date
- Oct 2009
- Location
- hyd
- Posts
- 2
- Helped
- 0 / 0
- Points
- 570
- Level
- 5

## Re: AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

and≡

take two cases i.e for a==0,a==1;('a' is a selected line for 2:1mux)

take 0 and b as inputs to mux

if(a==0)

out =0;

elsif(a==1)

out=b;[/img][/code]

- 18th October 2009, 16:00 #13

- Join Date
- Mar 2009
- Posts
- 2
- Helped
- 0 / 0
- Points
- 686
- Level
- 5

## AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

thanks guys, does anyone know how to use mux4 to generate Y=a(~b)(~c)+(~b)(~C)+(~a)(~c)...

that will be helpful..

Added after 1 minutes:

FYI just only one mux4

- 18th February 2010, 07:37 #14

- Join Date
- Apr 2009
- Posts
- 1
- Helped
- 0 / 0
- Points
- 659
- Level
- 5

## AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

same thing i can get for CMOS i.e. AND,NOT,OR,XOR,XNOR,NAND,INVERTER using CMOS

- 4th May 2010, 00:49 #15

- Join Date
- May 2010
- Location
- US
- Posts
- 2
- Helped
- 0 / 0
- Points
- 469
- Level
- 4

## Re: AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

Hi all,

I am a little bit confused on the OR gate.

The OR gate boolean expression is Y = BA' + AA => B(1-A) + A => A + B - AB. Shouldn't the OR gate boolean expression be A + B ? However, the definition of OR operation is A U B = A + B - AB. Did I miss anything? Correct me if I am wrong.

Thank you.

- 4th May 2010, 05:12 #16

- Join Date
- Jan 2008
- Posts
- 83
- Helped
- 28 / 28
- Points
- 1,693
- Level
- 9

## Re: AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

Hi,

Just to avoid confusion:

B(1-A) = B•(1-A)

which means "B is *dependent* on the inverse of input A".

Meaning, we only need to check B input if A=0.

B(1-A) + A should not be written as (B + A - A•B) to avoid confusion since we are not dealing with normal maths but Boolean logic.

Comparatively, (B + A•B) can be reduced to B using Boolean logic, i.e.:

B + A•B = B

but this is wrong in conventional maths.

So, how do we define the statement (B - A•B) in words for Boolean logic?

BTW, (1 - A•B) would define the NAND logic of inputs A & B.

Best regards.

- 4th May 2010, 18:35 #17

- Join Date
- May 2010
- Location
- US
- Posts
- 2
- Helped
- 0 / 0
- Points
- 469
- Level
- 4

## Re: AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

Hi,

I guess in this case the boolean multiplication is not like algebra multiplication. Some other cases, like

a--

b--OR--

c-------AND-- Y

will get Y = (a+b)•c = ac + bc.

Is there a rule indicates when the boolean multiplication cannot be used as algebra multiplication? How do we derive the b•(1-a)+ a to a + b as the OR gate boolean expression?

Thanks.

- 5th May 2010, 16:40 #18

- Join Date
- Jan 2008
- Posts
- 83
- Helped
- 28 / 28
- Points
- 1,693
- Level
- 9

## Re: AND,NOT,OR,XOR,XNOR,NAND,INVERTER using MUX

I think we just opened a can of worms !^_^ .

What I was trying to say was, don't expand minus signs.

Safer to leave 1-XXXXX as 'inverse of'.

Of course some one out there might be able to make sense of A-C.

Best regards.