Output of a Triple AND logic Gate

Discussion in 'General Electronics Chat' started by blank, Jun 18, 2008.

  1. blank

    Thread Starter Member

    Apr 26, 2008
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    the output of the AND logic gate is F=A*B

    in this tripple AND should be 0*C*D(bar) ?

    whats the meaning of "0" ?

    I need to take the logic integrand of a bigger combinative logic circuit and im stuck here.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    With three inputs, F = A*B*C. Just satisfy the input conditions.
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,144
    1,791
    We know this because AND is commutative and associative.

    If "0" means logic zero or false then the output can never be true. I'm guessing "0" means that something else is zero.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    This thread is a duplicate of one I answered in the Projects forum early this afternoon:
    http://forum.allaboutcircuits.com/showthread.php?t=12427

    Like Papabravo mentioned, I'd pointed out in the other thread that if the "0" input is indeed a logic low, the output will always be low/false no matter what the other inputs do.
     
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