4-bit ALU

Discussion in 'General Electronics Chat' started by assassinelec, Jan 9, 2012.

  1. assassinelec

    Thread Starter New Member

    Mar 22, 2011
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    hi all, i want to make a 4-bit ALU with logic gates only and i'm looking for a complete circuit diagram that can allow me to do so, till now i can't find anyone all the circuits i found are missing the reset and CLK buttons, does any one have the complete circuit for a 4-bit ALU ? , any help would be appreciated.
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
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    Alu is a combinatorial circuit, so the reset and clock inputs would serve no purpose.
    Look here at a complete 4bit ALU, no clock or reset in there.
     
  3. wire

    New Member

    Dec 18, 2011
    13
    1
    I have to implement 8 bit Alu.....but it should be a sequential circuits,,,,,confused ....Basically I would use registers to store the input data and output.
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,452
    3,371
    For our final year project in digital electronics, my partner and I built a 4-bit computer using the 74181 ALU. The DG Nova minicomputer also used this chip in its CPU.
     
  5. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Yes. You will also need to connect flag bits in the right way to make it truly 8bit.
     
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