方案:

系统组织部分: 信号发生芯片AD9850+单片机STC89C52+显示LCD1206+按键

芯片功能简单介绍(详细资料可参见21ic网站参阅.)

AD9850采用DDS(直接数字频率合成)技术, 即输入频率值, 通过内部调制, 经DAC产生信号 理论上可产生0~40MHz的正弦波信号

在此设计运用上, 用户通过按键电路经单片机设置的频率值送至AD9850,产生正弦波信号.

-Program: the system part of the organization: signal chip AD9850+ SCM STC89C52+ show LCD1206+ key chip features a brief (details can be found in 21ic website see.) AD9850 using DDS (direct digital synthesis) technology, that is, input frequency, through internal modulation, the DAC generates the signal　theoretically can produce 0 ~ 40MHz sine wave signal　used in this design, the user through the key circuit to set the frequency value by the microcontroller sent to AD9850, generate sine wave signals.