The essential blocks of the synthesizer, the prescaler, the phase detector, the chargepump, and the voltagecontrolled oscillator were presented.

提出了合成的基本模块，包括预分频，鉴相，充电泵和压控振。

A new type of digital phasometer applied to the infrared laser position-tracking system of mine hoister is introduced in the paper,which is based on FPGA and FFT algorithm.

要介绍了在矿井提升机红外激光位置跟踪系统中种新型数字鉴相的研究方法,该方法是基于FPGA件FFT法完成的。