Sum of Minterms clarification

Discussion in 'Homework Help' started by victoria277, Nov 6, 2011.

  1. victoria277

    Thread Starter New Member

    Nov 6, 2011
    4
    0
    Hi,

    Just starting out with logic gates so apologies if you have seen this question so many times

    Can someone tell me the difference between ∑m (which I know is sum of min terms)
    ∑ d (which I have no idea what this means) are these sum of Don't cares


    I am still researching on my own but will be grateful for any input



    Thanks
     
  2. Georacer

    Moderator

    Nov 25, 2009
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    1,266
    Can you provide the context of that information? I have never seen a reference to the sum of don' care terms before.
     
  3. victoria277

    Thread Starter New Member

    Nov 6, 2011
    4
    0
    @Georacer

    Sure here is what the full question looks like
    I am to find the simplified expression for "F"
    F(A,B, C, D) = ∑m(0,1,3,7,8,10) + ∑d (2,12,14)
     
  4. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    Yes, 2,12 and 14 seem to be don't care terms. So just throw them in a Karnaugh map, stir 'em a bit and see what comes out of the pot.
     
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