程序可变分频器是数字式频率合成器的一个重要组成部分,这种计数器实际上是选择状态数字的一部分预置到计数器中,使其计到最终状态。然后,这些特定的数再次置入计数器,于是,来自压控振荡器的频率被N除。所以预置决定了希望的分频比。但是,要完成这样的功能,我们在实验中遇到了不少的矛盾。主要是提高工作频率和降 Programmable frequency divider is an important part of the digital frequency synthesizer, this counter is actually part of the selected state number preset to the counter, to make it to the final state. Then, these specific numbers are reset to the counter again, so that the frequency from the voltage-controlled oscillator is divided by N. So the preset determines the desired frequency division ratio. However, in order to accomplish such a function, we encountered many contradictions in the experiment. Mainly to improve the working frequency and drop