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

提出了合成器的基本模块，包括预分频器，鉴相器，充电泵振荡器。

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.

主要介了在矿井提升激光位置跟踪系统中一种新型数字鉴相器的研究方法,该方法是基于FPGA器件运用FFT算法完成的。