MUX problem question...

Discussion in 'Homework Help' started by blackcoatman, Jun 24, 2007.

  1. blackcoatman

    Thread Starter New Member

    Jun 24, 2007
    I am typing a question from a past exams paper in our school:

    "Choose the proper Multiplexer for solving the equation: F=Σ(1,3,5,7,9,11). Give the table of truth of the multiplexer, as well as a drawing of the circuit."

    I guess a 4bit MUX and consecutively selecting each of the 6 numbers above in their binary form to let the MUX give them as an output does the trick, but what then? How to I get the "Σ" of them? Should I use a circuit to store the numbers, then add them? I'm a bit confused, because I remember in these past exams some people tried something with a simple gate, which I don't recall. Sorry If I sound like a noob :p Any help appreciated!
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
  3. recca02

    Senior Member

    Apr 2, 2007
    follow mrmeval's tip.
    the 'Σ' is for summation of minterms that wud give the output.
    try reading abt sop (sum of products).