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Digital circuits 2-input multiplexer implemented into an and gate

  1. Feb 11, 2012 #1
    How do you implement different gates by using a two-input multiplexer? What are the inputs supposed to be? How do you implement an AND gate, for example? An OR?
     
  2. jcsd
  3. Feb 11, 2012 #2
    There are different ways of building logic with a 2-to-1 multiplexer.

    One way is to built a 4-to-1 multiplexer with your 2-to-1 chips; once you have a 4-to-1 multiplexer, you can implement any logic function with 2 inputs.

    Food for thought: what happens if you choose your inputs to be:

    f(0,0) = 0
    f(0,1) = 1
    f(1,0) = 1
    f(1,1) = 0

    [​IMG]

    what will be the truth table for your inputs I0 and I1? which function f(x,y) are you implementing?

    Same process for AND / OR function.
     

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    Last edited: Feb 11, 2012
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