DDS在模拟调制系统中的应用

介绍了DDS在模拟调制系统中的应用。系统以CPLD为主控芯片,包括CPLD控制部分、高速AD采集部分、按键控制模块以及DDS输出部分四部分。该系统充分发挥了CPLD的高速处理能力以及DDS芯片的的高精度,将模拟信号转换为数字信号进行调制,通过多次的调试与测量,证明系统可以较好地实现对模拟信号的幅度调制和频率调制,同时输出频率较高,精度以及抗干扰性也较强。

This paper introduces the application of DDS at analog modulation system.The system is comprised of controlling part CPLD,acquisition part of high-speed AD,the module of key control as well as the DDS out-put part,with CPLD as the control chip.By fully utilizing handling quickly of CPLD and the high-precision of DDS,the analog signals convers to digital signals for modulation.By numbers of testing and measurement.