Details

Autor(en) / Beteiligte

• Chang, T.-Y.
• Hsiao, M.-J.

Titel

Carry-select adder using single ripple-carry adder

Ist Teil von

• Electronics letters, 1998-10, Vol.34 (22), p.2101-2103

Erscheinungsjahr

1998

Beschreibungen/Notizen

• Instead of using dual carry-ripple adders, a carry select adder scheme using an add-one circuit to replace one carry-ripple adder requires 29.2% fewer transistors with a speed penalty of 5.9% for bit length n identical with 64. If speed is crucial for this 64 bit adder, then two of the original carry-select adder blocks can be substituted by the proposed scheme with a 6.3% area saving and the same speed.