基于DDS的波形发生器的设计

The Design of Waveform Generator based on DDS

以ALTERA公司的FPGA为核心,以AT89S52单片机为控制器,利用Keil软件编写AT89S52的控制程序;利用微控制器、键盘、LCD显示、DDS模块、D/A转换、低通滤波器(LPF)模块设计并实现了多波形、频率范围大的波形发生器;利用第三方仿真工具ModelSim进行仿真。结果证明,可以得到可靠的波形。同时可以根据要求,修改波形存储器中的信息,得到不同种类的波形。

Taking FPGA ifi ALTERA Company as the core and AT89S52 single chip microcomputer as the controller, it makes use of Keil software to compile AT89S52 control program. It uses micro-controller, keyboard, LCD display, DDS module, D/A conversion, low-pass filter （LPF） module to design and realize waveform generator of multi-waveform and wide t^equency range. It makes use of ModelSim of the third party simulation tool to make simulation. The result shows it can gain the reliable waveform. At the same time, according to the requirement, it can modify wave information in memory and get different kinds of waveform.