How do I implement an 8-1 multiplexer in a full adder?

Discussion in 'Homework Help' started by anaki73, Jul 24, 2006.

  1. anaki73

    Thread Starter New Member

    Jul 24, 2006
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    Help,

    I am having trouble with the following question :

    Implement a full adder using two 8-to-1 MUXes. Connect X,Y, and Cin to the control inputs of the MUXes and connect 1 or 0 to each data input.

    Do I need to wire the two muxes to a full adder circuit or do I need to make a full adder out of two multiplexers?

    Any help would be greatly appreciated

    Anaki
     
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
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    You need to implement the full adder by using the two muxes, not just wiring the muxes to a full adder. If you need a hint on how to achieve this, think of a full adder truth table, mapped to the muxes input and the correct output values are selected by three control lines, which are mapped full adder input.
     
  3. Dave

    Retired Moderator

    Nov 17, 2003
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    As a reference you may wish to refer to the following information on Full Adders.

    Dave
     
  4. baluraja

    New Member

    Aug 13, 2007
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    Please show me the correct sketch!!!!
     
  5. Dave

    Retired Moderator

    Nov 17, 2003
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    I've got a better suggestion - you show us how you think the sketch will look and we'll give you some feedback on it.

    Dave
     
  6. Papabravo

    Expert

    Feb 24, 2006
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    Dave,

    Was it exclamation point #2, #3, or #4 that pushed you over the edge?
     
  7. recca02

    Senior Member

    Apr 2, 2007
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    why is it that you do not wish to try or do no want to share your idea on the topic?
    this forum is to help u learn.
     
  8. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    recca,

    Attached is the schematic some have when they post their inquiry especially in the homework area.

    It's a shame.
     
  9. recca02

    Senior Member

    Apr 2, 2007
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    well, MR. Joe,
    that speaks for itself. :p
     
  10. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    Am I having a problem viewing the image or is the image supposed to be blank, which would make a perfect sense in this case as well? :p
     
  11. recca02

    Senior Member

    Apr 2, 2007
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    or we can make it look the same as "the king is not wearing any clothes".:D
    at first i was expecting something in it:(:p

    (btw, its blank or r we both r not lucky enuf to be able to see it;))


    for the question: read the first reply to the op and ask any doubts u may have.
     
  12. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    The second part of your assessment is correct N9352527. :D
     
  13. Dave

    Retired Moderator

    Nov 17, 2003
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    Lol! I think it was #3! #4 was just adding salt to the wounds!

    Is that one of my designs! :D

    Very apt.

    Dave
     
  14. Papabravo

    Expert

    Feb 24, 2006
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    Looks like we just minted another Art History Major.
     
  15. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    In case you didn't recognize it .... that picture was two polar bear's getting it on ... in a white out. :D
     
  16. Dave

    Retired Moderator

    Nov 17, 2003
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    Discrete! :D

    Dave
     
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