Hello People I need some help with 2 bit comporator

Discussion in 'Homework Help' started by tetova, May 30, 2012.

  1. tetova

    Thread Starter New Member

    May 30, 2012
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    Hi to everyone I would apperciave everyones help, I have an project in Fundamental of logic design, I've done all of it expect the EXPERIMENTAL BOARD with series number can anyone tell me how to do it ?

    Best Regards.
     
  2. tetova

    Thread Starter New Member

    May 30, 2012
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    any solution ?
     
  3. crutschow

    Expert

    Mar 14, 2008
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    Have no idea what the EXPERIMENTAL BOARD is. :confused:
     
  4. tetova

    Thread Starter New Member

    May 30, 2012
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    This is the one I did [​IMG]
    Now I have to design it like this but I have no Idea how to do it, if you can do it for I would apperciate it very much couse its very urgently :(
    [​IMG]
     
  5. MrChips

    Moderator

    Oct 2, 2009
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    Just remember that no one is going to do your homework for you.
    If you have a problem or a question maybe someone will try to help.
     
  6. tetova

    Thread Starter New Member

    May 30, 2012
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    Dear MrChips am not asking to do my homework am asking help for this thing :).
    If you can help I would apperciate couse this asnwer didn't help me at all :]
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    Well then what is your question?
     
  8. WBahn

    Moderator

    Mar 31, 2012
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    Q1) What is the truth table for what you WANT to have happen?

    Q2) What is the truth table for what IS happening?

    Q3) Which of the three outputs is not behaving properly?
     
  9. WBahn

    Moderator

    Mar 31, 2012
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    But in the your previous reply, that is exactly what you asked for.

     
  10. absf

    Senior Member

    Dec 29, 2010
    1,492
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    First you have to change U1 U2 and U3 to something easier for u to understand.

    Let's assume the 3 inputs of U1 are A, B and C and the output is (A>B).

    (A>B) = A' + B' +C' = (A.B.C)' So U1 & U2 are actually 3-input NAND gates.
    Applying the same method, U3 is 2-input NOR gate.

    Then you can google for TTL inverter, TTL 2-input NOR. TTL 2-input NAND and TTL 3-input NAND gates. Get the chip numbers and and their datasheets. Put the pin # onto your schematic as well as the part numbers. Then you can start connecting your Experiment Board...

    HTH

    Allen
     
  11. tetova

    Thread Starter New Member

    May 30, 2012
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    This helped me a lot thank you very much :)

    And you others thanks for waisting my time :)
     
  12. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,356
    You're very welcome. Please don't come again.
     
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