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在设计、分析和调试锁相环路时,常常遇到许多繁琐的计算。如果需要改变环路的某个参数,要估计其它各主要参数的变化情形,就觉得很费时费力,不能准确、迅速地得到结果。因此,我们提出这样两个问题:第一,能不能避免这些重复性的繁琐计算。第二,能不能简化这些计算?我们知道,短波通信机中采用锁相技术,目的是用单一的高稳定度晶体做成标准频率
There are many tedious calculations often encountered when designing, analyzing, and debugging PLLs. If one of the parameters of the loop needs to be changed, it is time-consuming and laborious to estimate the changes of other major parameters and the result can not be obtained accurately and rapidly. Therefore, we put forward two questions: First, can we avoid these cumbersome and repetitive calculations? Second, can we simplify these calculations? We know that shortwave communication machine using phase-locked technology, the purpose is to use a single high-stability crystal made of standard frequency