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 4-Bit Multiplier [Simple]
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By: farhan89 (offline) on Thursday, October 29 2009 @ 07:51 AM PDT (Read 14304 times)  
farhan89

Hello all,
Can anyone give me any link for the Circuit Diagram of Simple 4 Bit multiplier. I need it Badly . The Circuit should be simple , no repple adders or Shift register. Just Ic's and Half adders and full adders.


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By: Windell (offline) on Thursday, October 29 2009 @ 10:06 AM PDT  
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"Just Ic's" is a pretty broad requirement-- why not just use a SN74285? Or program a microcontroller, like an ATtiny2313 to do it? The final circuit in either of those cases will be much simpler than if you build it with adders.


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By: farhan89 (offline) on Thursday, October 29 2009 @ 11:17 AM PDT  
farhan89

Quote by: Windell

"Just Ic's" is a pretty broad requirement-- why not just use a SN74285? Or program a microcontroller, like an ATtiny2313 to do it? The final circuit in either of those cases will be much simpler than if you build it with adders.



Actually i want to use adders, my teacher told me that i can't use any extra device which i don't know. Till Know i know about gates , Adders, decoders, encoders, Multiplexers, De multiplexers . SO i have to built this Circuit using these components.


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By: Windell (offline) on Thursday, October 29 2009 @ 11:43 AM PDT  
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Well, if it's a homework assignment, then I certainly shouldn't just give you the answer, should I? Twisted Evil

You should probably at least have to use Google to research the subject. There are a few example circuits of this online. You can find one of them.


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By: farhan89 (offline) on Thursday, October 29 2009 @ 11:05 PM PDT  
farhan89

Quote by: Windell

Well, if it's a homework assignment, then I certainly shouldn't just give you the answer, should I? Twisted Evil

You should probably at least have to use Google to research the subject. There are a few example circuits of this online. You can find one of them.



Not the Home assignment at all , just a challenge with my friend he told me that No one can make without using the shift register and ripple adders Laughing Out Loud . So i have challenged him that i can make and he gave me the time till Monday. I just want circuit diagram then i will mail him and also post it to our Notice Board.

i have searched Google but i didn't got the desired results . Can u help me plz. Can u give me any link to the circuit diagram image.

Thanks


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By: Windell (offline) on Thursday, October 29 2009 @ 11:12 PM PDT  
Windell

Look a little harder. I found a circuit within the first two minutes of looking. Smile


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By: farhan89 (offline) on Thursday, October 29 2009 @ 11:24 PM PDT  
farhan89

Quote by: Windell

Look a little harder. I found a circuit within the first two minutes of looking. Smile



plz can u give me that circuit image , I need it badly. plz


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By: farhan89 (offline) on Friday, October 30 2009 @ 12:04 AM PDT  
farhan89

look thgis pic:
http://upload.wikimedia.org/wikipedia/en/7/7b/Binary_multi1.jpg

can i add two more "A" and "B" to make this a 4 bit multiplier?


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By: Windell (offline) on Friday, October 30 2009 @ 12:10 AM PDT  
Windell

If you understand how that circuit works, you'll understand how to extend it.
Another way is to... actually figure it out yourself. Write down the procedure that you use to multiply two four-bit numbers and see what happens!


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By: farhan89 (offline) on Friday, October 30 2009 @ 02:09 AM PDT  
farhan89

Quote by: Windell

If you understand how that circuit works, you'll understand how to extend it.
Another way is to... actually figure it out yourself. Write down the procedure that you use to multiply two four-bit numbers and see what happens!



Yeah i Know It's Working but i am confused because the image link which i gave to you has first b1 and then b0 on right side while on left side a1 is after a0.
If u can give me ur Circuit it would be appreciated Big Grin

P.S: I m trying to extend it and may be i will post the diagram here then tell me whether i am correct or not ok?


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By: farhan89 (offline) on Friday, October 30 2009 @ 02:47 AM PDT  
farhan89

Ok i have Implemeted the Logic.

A0 , A1, A2, A3 will have 4 And Gates Each and First B0, B1, B2 B3 Will be Multiplied to the 4 and Gates of A0 then With A1 then With A2 then with A3. Is it Ok?

Now i want to Know How i give Inputs to the 74283 IC, Just Tell me This I will do the Rest of Work.


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By: farhan89 (offline) on Friday, October 30 2009 @ 07:56 AM PDT  
farhan89

Where are u Admin , plz help me . I have SHows this to my friend and he told me that It's Wrong , beacasue it can perform anser upto 5 bits.

plz help plz

I badly need that circuit


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By: Windell (offline) on Friday, October 30 2009 @ 09:49 AM PDT  
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Where are u Admin , plz help me . I have SHows this to my friend and he told me that It's Wrong , beacasue it can perform anser upto 5 bits.

If you multiply two four-bit numbers, your answer may have up to 8 bits. Example: 15*15= 225.


I've tried to point you in the right direction a few times, but here: I'll show you how it's done. Click here.


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By: farhan89 (offline) on Saturday, October 31 2009 @ 12:20 AM PDT  
farhan89

Quote by: Windell

Where are u Admin , plz help me . I have SHows this to my friend and he told me that It's Wrong , beacasue it can perform anser upto 5 bits.


<p>
If you multiply two four-bit numbers, your answer may have up to 8 bits. Example: 15*15= 225.
<p>
<br>
I've tried to point you in the right direction a few times, but here: I'll show you how it's done. <a href="http://tinyurl.com/yjux8ll">Click here</A>.



lol! Nice Link.
But i have tried searched this 10 times and i didn't got the Exact Results. Even i built the Logic . Now i want to simulate it but the multisim is not showing that L.E.D is Glowing. I placed a Volt mater around L.E.D and It Shows 0.15mV. I have testes the 2 bit Multiplier on Multisim . I design a Circuit of the Image that i shows u yesterday


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By: farhan89 (offline) on Saturday, October 31 2009 @ 09:56 AM PDT  
farhan89

Hurrah I have mad the Circuit Diagram , Now It's Working Fine on Multsism .


Thanks Windell for ur Help!


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