| Title |
A Design of the Redundant Binary Coded Decimal Adder for the Carry-Free Binary Coded Decimal Addition |
| Authors |
제정민(Je, Jung-Min) ; 정태상(Chung, Tae-Sang) |
| Keywords |
carry-free addition ; redundant number systems ; binary coded decimal number ; BCD adder |
| Abstract |
In the adder design, reduction of the delay of the carry propagation or ripple is the most important consideration. Previously, it was introduced that, if a redundant number system is adopted, the carry propagation is completely eliminated, with which addition can be done in a constant time, without regarding to the count of the digits of numbers involved in addition. In this paper, a RBCD(Redundant Binary Coded Decimal) is adopted to code 0 to 11, and an efficient and economic carry-free BCD adder is designed. |