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Homework Help: Multiplexer universality

  1. Sep 5, 2008 #1
    1. The problem statement, all variables and given/known data
    How to build a AND gate using a 2X1(2 inputs, 1 select,1 output) multiplexer?
    The same for a NOT gate?
    I am stuck on it!
    thank you

    2. Relevant equations

    3. The attempt at a solution
    Sorry I tried but I am confuse about what are consired as input if we decide to fix one input.
  2. jcsd
  3. Sep 6, 2008 #2


    User Avatar
    Science Advisor

    If you decide to fix one of the inputs, it'll still be considered an input, just an input that always has the same value.

    HINT1: How many inputs has an AND gate? You shouldn't need to fix any inputs on your MUX (at least, not to 0 or 1)
    HINT2: How many inputs has a NOT gate? You will need to fix MUX inputs.
  4. Sep 8, 2008 #3
    Thank you
    I will work on it!
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