Decoder logic using a NAND gate

Discussion in 'Homework Help' started by sealpuncher, Oct 17, 2011.

  1. sealpuncher

    Thread Starter New Member

    Oct 17, 2011
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    0
    Hi there. I'm so lost right now. For my prelab I'm supposed to draw a schematic using a 3-8 decoder and an 8 input NAND gate to implement the minterm list (0,1,3,5,7) If I was given the decoder and an OR gate I could do this pretty easily but the NAND gate completely throws me off. I really have no idea what I'm supposed to do. I know that each output on the decoder corresponds to each minterm number and that a normal OR gate would check to see if one of the minterms is high or not.

    Help would be appreciated..
     
  2. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    Could it be that your decoder has an active LOW output? That would allow you to use the NAND gate in the same manner as an OR gate with an active HIGH decoder.
     
  3. sealpuncher

    Thread Starter New Member

    Oct 17, 2011
    2
    0
    Yeah I just figured out from carefully reading a note in my textbook haha. Thanks though. PROBLEM SOLVED Now I can play starcraft. College...
     
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