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How to use 4-bit parallel adders to perform 2Cs' subtraction?

  1. Dec 8, 2006 #1
    Does anyone know how to use 4-bit parallel adders to perform 2Cs' subtraction? Thanks.
     
    Last edited: Dec 8, 2006
  2. jcsd
  3. Dec 8, 2006 #2
    Just complement one input with inverters and add it to the other input.
     
  4. Dec 14, 2006 #3
    oh i see. Thks!
     
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