可编程控制移相器设计与实现

The Design and Implementation of Programmable Control Phase Shifter

本论文主要研究了锁相环的特性，得出通过加入控制电压，可以得到不同的移相信号。然后将原始信号和输出信号与移相后的信号通过鉴相器来比较，将比较结果通过MCU辨别是否达到要求；若没达到要求就将输出信号继续输入移相，直到达到要求后再停止。其中锁相环是用到74HC4046，它是一个集成的低功率锁相环，其中集成了一个VCO，三个鉴相器。通过74HC4046和辅助电路的设计来实现一定范围的移相。

This paper mainly study the features of Phase Lock Loop（PLL）.It can come out that through an control voltage,different phase output signals can be obtained.Then we can compare the differences among the original signal,the output signal and the phase signal and checkout the compared result through MCU.If the result can not reach our needs,the output signal should continue to be shifted until the result according to our request.The 74HCA046 is a low power phase lock loop that contains a low power linear voltage controlled oscillator （VCO） and three phase comparators.The shift can be achieved through a demo circuit for the design.