Exam Tomorrow!

Discussion in 'Homework Help' started by mikewilliams, Nov 9, 2008.

  1. mikewilliams

    Thread Starter Member

    Nov 4, 2008
    10
    0
    Hi all I am studying for my exam, and I am looking at different problems, that will be of similarity to the questions tomorrow. I am stuck on how to approach these two however. If you could help me out quickly that would be great as my exam is tomorrow!

    Thanks
     
    Last edited: Nov 10, 2008
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Both are way too small to read.
     
  3. mikewilliams

    Thread Starter Member

    Nov 4, 2008
    10
    0
    beenthere, I think when you open them you can click on it with the magnifying glass and then they are full size. If that doesn't work for you I will try to repost.

    Thanks
     
  4. veritas

    Active Member

    Feb 7, 2008
    167
    0
    I am unable to read the first image.

    For the second problem, you can think of part (a) as being two different independent steps:
    1) Find f1(a, b) such that f1 = 1 if a < b
    2) Find f2(a, b) such that f2 = 1 if a = b

    What questions do you have about these two steps?
     
  5. veritas

    Active Member

    Feb 7, 2008
    167
    0
    You can define the function by the truth-table
     
  6. mikewilliams

    Thread Starter Member

    Nov 4, 2008
    10
    0
    hi veritas,
    I have figured out that F1 = A'B and F2 = A'B' + AB and I have drawn that implementation. i think what i am having trouble with is part b and c. Do G1 and G2 just follow F1 and F2? I dont believe so but I am not seeing how to solve these.

    Also I will work on reposting problem #1
     
  7. mikewilliams

    Thread Starter Member

    Nov 4, 2008
    10
    0
    ok i have made them word attachments, you should be able to read both now.

    Thanks
     
  8. veritas

    Active Member

    Feb 7, 2008
    167
    0
    G1 will have 4 inputs: f1_0, f2_0, f1_1, and f2_1, where '_n' is subscript bit.

    One or more of those inputs may simplify away, but start by using all of them.

    The same is true for G2
     
  9. mikewilliams

    Thread Starter Member

    Nov 4, 2008
    10
    0
    any ideas on the other problem?
     
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