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Boolean circuit electrical engg 2nd year

  1. Oct 3, 2012 #1
    hi everyone i have a lab due tomorrow and wondering if someone can help me with question b. See attachment. I have done the k graph and got my boolean equation

    c'd+bd+b'cd'+ab'd. i just simply cant make the circuit.
    i have to use only and or gates.
    can someone please help

    Not sure if you can view the attachment. if you cant i have uploaded alternate links

    http://i46.tinypic.com/wtt7a8.png

    http://s9.postimage.org/vwyydvd7z/Sc...1_07_05_PM.png [Broken]

    Thanks
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Oct 4, 2012 #2

    CWatters

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    The problem actually says inverters are allowed as well. So you can also use NAND and NOR gates if you wish (eg make a NAND from an AND and an inverter, however you may not actually need a NAND gate).
     
  4. Oct 4, 2012 #3

    LCKurtz

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    Of course, you never need a NAND gate since the three (AND OR NOT) are sufficient for any logical expression. I guess the interesting thing about that is that NAND's and NOR's each by themselves are also sufficient.
     
  5. Oct 5, 2012 #4

    CWatters

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    Indeed. Many early gate arrays were nothing but a sea of one type of gate.
     
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