simple logic circuit

Discussion in 'Homework Help' started by yagmai, Nov 2, 2005.

  1. yagmai

    Thread Starter New Member

    May 19, 2005
    Dear all, I kind of confuse by the question.

    A logic circuit has 5 inputs: A*, B, C*, D*, E and one output Y. The ouput Y is asserted if one or more of the following conditions occurs:

    . A*, C* and E are all asserted
    . B is asserted but neither A* nor D*is asserted
    . B is negated but D* or E is asserted

    Using suitable logic symbols, draw a clearly labelled logic circuit diagram to illustrate the circuits's behaviour.

    The B* asserted , A asserted is confusing me. Thanks
  2. Brandon

    Senior Member

    Dec 14, 2004
    If B is asserted, then it means that B* is not. I.e. If B is True,. B* is False
    If B* is asserted then B is NOT. i.e. if B* is True then B is False

    Get it?

    The word but typically means AND in logic, Asserted = TRUE, Negated = FALSE, Neither __ nor __ also is AND. Or is obvious. Just like is substitutes for an = sign in word problems, etc.

    Hope this helps.