采用低端FPGA实现直接数字频率合成的优化设计

当前大多数DDS实现方案要满足工程要求，成本和复杂度都很高。为此，提出一种基于 相位合成利用低端FPGA实现DDS的优化设计方案，介绍了其硬件和软件实现。 实测结果表明，所设计的DDS功耗低，输出信号频率稳定度高，频率转换速度快，输出频 点灵活，任意设置信号波形效果好，能普遍应用于通信调制、仪表检测、信号发生中。

Optimized design of a direct digital frequency synthesizer based on low-end FPGA

Most existing DDS design schemes are costly and complex to satisfy engineering requirements.In this paper,an optimization design based on phase synthesis and low-end FPGA is proposed.The hardware and software design are provided. Test resuts show that the designed DDS consumes low power and can output stable signal, convert frequency fastly, output flexible frequency sig nals and has good effect in setting arbitrary waveforms. It can be widely appl ied in communication signal modulation,instrument detction and signal generation .