摘要
该设计目的在于给出一型高性能键控信号源的设计方案,设计中采用直接数字频率合成方法,以DDS芯片AD9951作为核心芯片,以AD9951作为主控制器,设计一种通过键盘控制、液晶显示输出频率与波形的信号源。该设计可以输出频率为0.1 kHz^80 MHz的正弦波方波和三角波。实验结果表明,硬件电路结构简单,软硬件拓展性好,输出信号频率稳定,分辨率高。
The aim of this experiment is to give a design of a key- controlled signal source with high performance. In the design process, Direct Digital Frequency Synthesis （DDS） method is used. By using AD9951 DDS chip as the core chip and the main controller,a signal source is obtained and the output frequency and waveform can be controlled by keyboard and displayed by LCD. This design can output sine wave, square wave and triangular wave between 0.1 kHz-80 MHz. Results of the experiment shows that this design has many advantages：the structure of hardware circuit is simple, the software and hardware circuit have a good extend space and the output signal has a stable frequency with high frequency resolution.
出处
《现代电子技术》
2009年第23期115-117,120,共4页
Modern Electronics Technique
