4-Bit Full Adder

Discussion in 'Homework Help' started by eki_tisna_amijaya, Nov 4, 2006.

  1. eki_tisna_amijaya

    Thread Starter New Member

    Nov 4, 2006
    I need to know how to design 4-bit full adder using half adder. Also, the design of logic diagram is needed. Just a simple question.:)
  2. Dave

    Retired Moderator

    Nov 17, 2003
    Ok I will help you with this one since I have the schematic and derivations for a Full Adder comprosed of Half Adders (4 inverters, 6 NORs and an Or gate), but I won't just give it to you.

    So have you attempted this question? If so what have you come up with?

    If not, can you tell me what the truth-table is for a half and full adder?