Full adder module

Discussion in 'Homework Help' started by khanner, Nov 27, 2008.

  1. khanner

    Thread Starter New Member

    Nov 27, 2008
    3
    0
    Q) How do i design a Full adder module with data inputs X and Y, carry input Cin, Sum output S, and Carry output Cout using:

    a) a 3-8 decoder and NAND gates
    b) 4 to 1 multiplexer
     
  2. blazedaces

    Active Member

    Jul 24, 2008
    130
    0
    This is a place to aid you when you can not go any further in your problem, not a place to have your homework done for you.

    Please attempt the problem first, using the resources you already have and come back if you get stuck after that...

    -blazed
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Make up a truth table and see if that doesn't point you in a direction.
     
  4. khanner

    Thread Starter New Member

    Nov 27, 2008
    3
    0
    i constructed a truth table and finished part (a).
    I now need help with the 4 to 1 multiplxer, if there are 3 inputs what do i put for the 4th input.

    Thanks for looking at my question
     
  5. khanner

    Thread Starter New Member

    Nov 27, 2008
    3
    0
    i constructed a truth table and finished part (a).
    I now need help with the 4 to 1 multiplxer, if there are 3 inputs what do i put for the 4th input.

    Thanks for looking at my question
    [​IMG]
     
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