该高频正弦信号发生器基于直接数字频率合成（DDS）和数字锁相环技术（DPLL），以微控制器（MCU）和现场可编程逻辑门阵列（FPGA）为核心，辅以必要的外围电路设计而成。系统主要由正弦信号发生、红外遥控、高速模数（A/D）－数模（D/A）转换、信号调制和后级处理等模块组成。-The high-frequency sinusoidal signal generator based on Direct Digital Synthesis (DDS) and digital PLL (DPLL), a

The design of the All Digital FM Receiver circuit in this project uses Phase Locked Loop (PLL) as the main core. The task of the PLL is to maintain coherence between the input (modulated) signal frequency,iωand the respective output frequency,oωvia p