本文将电子计算机中加法功能的进位部份特别抽出用逻辑代数加以描述,文中叙述了用晶体管、二极管、脈冲变压器构成这种功能的进位电路于一拍时鐘脈冲的间隔内完成,并采用元件数量比较少的并行加法器,使加法速度飞跃地上升。其次,还谈到用于二进位的情况,也叙述了用到十进位的效果。考虑到科学计算上所需耍的位数制成了一个40位的进位电路,所得的工作特性很好。 In this paper, the carry part of the addition function in electronic computer is specially extracted and described by logical algebra. The article describes that the carry circuit composed of transistors, diodes and pulse transformers is completed within one clock pulse interval. Adopt the parallel adder that the component quantity is relatively few, make the addition speed leap rise. Secondly, we also talk about the situation for binary, also described the effect of using the decimal. Considering the number of bits needed for scientific computing, a 40-bit carry circuit was made and the resulting work performed well.