boolean expressions

Discussion in 'Math' started by gilbertkunda, Mar 15, 2009.

  1. gilbertkunda

    Thread Starter New Member

    Mar 15, 2009
    1
    0
    Hi! there,
    Guys I have just started doing boolean expressions and Iam really stuck with my assignment which in three days. Any help would be appreciated greatly.
    I know all about the rules and regulations but Iam really in a fix. Please help.
    The question is: Write the following boolean expression in sum-of-minterms form: F(A,B,C) = A.
    At least this will get me started.
     
  2. ako

    Member

    Mar 14, 2009
    10
    0
    F(A,B,C) = A = ∑(4,5,6,7)
    Not sure about the notation.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
  4. RiottoiR

    New Member

    Dec 20, 2008
    6
    0
    mate this is basic stuff, you should know this!!!

    basically you should start with a truth table for F(A,B,C) = A , which means where A is high (1), your out put is high. min terms
    0 0 0 = 0 = m0
    0 0 1 = 0 = m1
    0 1 0 = 0 = m2
    0 1 1 = 0 = m3
    1 0 0 = 1 = m4
    1 0 1 = 1 = m5
    1 1 0 = 1 = m6
    1 1 1 = 1 = m7

    therefore your sum of min-terms would be F(A,B,C) = ∑m(4,5,6,7)

    this then leads on to, Standard Sum of Products (SSOP)

    SSOP = AB'C' + AB'C + ABC' + ABC

    make sure you learn how to get from SSOP to SOP, SPOS and POS. these will most likely be asked in an exam.
     
  5. bmealhendi

    New Member

    Mar 23, 2009
    8
    0
    hi,,, u see that expression fix in A so u add A in all minterms and the rest varaible u alternate between their values
    so the minterms 4,5,6,7 and note that A appears uncomplemented
     
  6. Ratch

    New Member

    Mar 20, 2007
    1,068
    3
    gilbertkunda,

    You really ought to download the program found in this link. http://forum.allaboutcircuits.com/showthread.php?t=22347 . It will give you the minterms of just about any Boolean expression in a flash. Maxterms also. Make sure you read the short documentation and set the program for the right number of logic variables.

    Although you cannot bring this program into a test, it is a great educational help because it allows you to check your work on practice problems.

    Ratch
     
  7. lqyromeo

    New Member

    Oct 28, 2008
    8
    0
    0^1=0
    0^0=0
    0U1=1
    0U0=0
    1^1=1
    1U1=1
    This is boolean math question, another expression is ture and fause.
    You should be learn it up.
     
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