基于FPGA的DDS正弦信号发生器的设计和实现

利用FPGA芯片及D／A转换器，采用直接数字频率合成技术，设计实现了一个频率、相位可控的正弦信号发生器，同时阐述了直接数字频率合成（DDS）技术的工作原理、电路结构，及设计的思路和实现方法。经过设计和电路测试，输出波形达到了技术要求，控制灵活、性能较好，也证明了基于FPGA的DDS设计的可靠性和可行性。

Design and Implementation of Direct Digital Frequency Synthesis Sine Wave Generator Based on FPGA

Based on FPGA and D/A chip, a sine wave generator that frequency and phase is controllable is designed with direct digital frequency synthesis (DDS) technology. The principle and structure of DDS is expounded, and also the design thinking and implementation method. The output wave by test achieves the required aims, easy control and high performence. It is proved that the design based on FPGA with DDS is dependable and feasible.