The Numerically Controlled Oscillator is the key component it the implementation of DPLL. Two methods were adopted to achieve NCO based on the combination of Verilog language and FPGA of Xilinx.

• 数字锁相环数控振荡器设计是数字锁相环电路的关键部分,在利用Verilog语言配合Xilinx的FPGA的基础上,采用两种方法实现数控振荡电路。