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Homework Help: Implementing a Multiplexor

  1. May 28, 2009 #1
    1. The problem statement, all variables and given/known data

    The question is to:

    Implement an eight-input multiplexor using a three-input decoder and NAND gates

    3. The attempt at a solution

    Not sure how to work this at all. The decoder has 3 inputs and the multiplexor has 8. So if the selectors of the Multiplexor are 101 that implies that it outputs x_5, but how can you get x_5 out of a decoder and some NAND gates?

    edit: Oh wow, nevermind. Was about to go to sleep then it just hit me like lightning to figure it out. the decoder's the selects and goes into nand gates which are fed x_0 to x_7, that's ridiculously easy
    Last edited: May 28, 2009
  2. jcsd
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