本文介绍一种利用控制器控制分频器的工作状态,以实现小数点分频的方法。文中提出二种分频(置位法与置数法)的原理及实现的具体方法。置位法是利用控制器在分频器工作周期结束对J—K触发器进行置位控制,以实现分频的一种方法;而置数法则是利用控制器对分频器进行周期置数实现分频的一种方法。 This article describes a method using the controller to control the operation of the divider in order to achieve a fractional-point frequency. The paper presents two kinds of frequency division (set method and set number method) and the realization of the specific methods. Set method is to use the controller at the end of the divider to set the J-K trigger control, in order to achieve a method of frequency; and set the number of rules is to use the controller on the frequency divider cycle set A way to achieve frequency.