DeMorgans Law using NAND gates

  • Thread starter aurao2003
  • Start date
  • #1
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Homework Statement


Hi
I am struggling with the diagram of this question. Can anyone help? I would have loaded my diagram but unsure how to do it. This is the question:

Starting with the following statement (A+B).(A+C), show how this can be implemented using NAND gates using DeMorgans law.



Cheers


Homework Equations





The Attempt at a Solution


After doubly negating, I obtained (A.B) + (A.C). And this is where I get stuck.
Please help. I have a deadline looming this week.
 

Answers and Replies

  • #2
ehild
Homework Helper
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Try to expand and then simplify the expression first.

ehild
 
  • #3
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Thanks for a response. I am okay with the maths but unsure about the actual diagram. Any pointers? Thanks.
 
  • #4
ehild
Homework Helper
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The double-negated (A+B).(A+C) is not A.B+A.C.

If you do not know how to draw the diagram, see http://www.kpsec.freeuk.com/gates.htm. Copy the figures and construct the circuit from them.
If you do not know how to upload it into your post, click on "Go Advanced".

ehild
 

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