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Digital logic equation problem

  • Thread starter Koopan
  • Start date
  • #1
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Hi,
I'm new to this forum.
My problem led me here.

Homework Statement


I need to solve this, using simplifying rules.
∫ = Ʃ(0,5,6,7,13)

But I always get one extra area when checking with Karnaugh map, which isn't necessary.

Homework Equations


∫() = a' b' c' d' + a' b c' d + a' b c d' + a' b c d + a b c' d


The Attempt at a Solution


Well I get always this as a solution, no matter the order i simplify

∫() = a' b' c' d' + b c' d + a' b c + a' b d


Now when applied to Karnaugh map the areas (equation parts from left to right 1-4) 1, 2, 3 are the solution I get when only using the map. But 4 overlaps with 2 and 3.

http://s8.postimage.org/dbo6zqrab/img.jpg [Broken]
img.jpg


If anyone has time to help me out, then please do.

Thanks
 
Last edited by a moderator:

Answers and Replies

  • #2
NascentOxygen
Staff Emeritus
Science Advisor
9,244
1,071
I need to solve this, using simplifying rules.
[itex] \int = \sum (0,5,6,7,13) [/itex]
Can you explain what this means, and how you went about solving it? I might catch on to what you are doing.
 
  • #3
186
0
The k-map produces the right result: The simplified equation is:

a' b c +b c' d + a' b' c' d'

There is more you can do with your equation

a' b' c' d' + b c' d + a' b c + a' b d

Hint: Consensus Theorem :)
 
  • #4
2
0
Thank you Ivan92 your advice helped me solve this.

Now as I'm here does anyone know any free or opensource software for modelling this function visually?
 

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