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自动仪器、仪表检测中,往往要进行一些数字计算,实现加、减、乘都比较方便,但遇到除法就感到麻烦些,其控制部分更觉困难。本文就如何选择和实现既快速而元件又少的除法器谈些看法。一、脉冲累加计数法这种方案从原理上说是很简单的,即对某计数器每加入相等于除数数值的脉冲个数时,商计数1,一直灌到该计数器的数字与被除数相等时刻,符合门输出停止指令,关闭脉冲源。这种方案原理简单,易于掌握,但其最大缺点是速度太慢。尽管在线路上可作一些改进,如添加一些程序控制门等来提高运算速度,但一般还是难以满足自动
Automatic instruments, instrumentation testing, often to carry out some numerical calculations, to add, subtract, multiply are more convenient, but encountered in the division of trouble, the control part of the more difficult. This article talked about how to choose and implement a fast, low-component divider. First, the cumulative pulse counting method This scheme in principle is very simple, that is, for each counter is added to equal the number of divisor pulse number, the quotient 1, has been filled to the counter number and dividend equal time, In line with the gate output stop command, turn off the pulse source. The principle of this scheme is simple, easy to master, but its biggest drawback is the speed is too slow. Although some improvements can be made on the line, such as adding some program control gates to improve the operation speed, it is generally difficult to meet the automatic