基于Verilog的数字锁相环。包括三个模块，数字鉴相器DPD、数字环路滤波器DLF、数控振荡器 DCO三部分构成-Verilog-based digital PLL. Consists of three modules, the digital phase detector DPD, digital loop filter DLF, digitally controlled oscillator DCO three parts

可增可减的计数器，可以用于全数字锁相环中的环路低通滤波器-Either upwards or downwards counter low-pass filter can be used for all-digital phase-locked loop in the loop