摘要
根据直接数字频率合成(DDS)技术,以可编程DDS集成芯片AD9833为核心,设计了一种便携式信号发生器,可产生正弦波和方波信号。该信号发生器由供电系统、单片机系统、DDS波形发生模块、幅度调节模块、方波发生模块、继电器输出模块等构成,介绍了相应的硬件和软件。实验表明:该信号发生器具有信号频率误差小、分辨率高、体积小、质量轻等优点。
According to direct digital synthesis （DDS） , a portable signal generator was designed based on the DDS chip- AD9833,which could output sinusoidal wave and square wave. The portable signal generator consisted of power supply module, MCU control module, DDS signal generate module, amplitude modulation module, square wave generate module and output module. The system structure, the design of software and hardware are analyzed in detail. Experiments show that the portable signal generator has some advantages, such as little frequency error, high resolution, low cost, small volume.
出处
《仪表技术与传感器》
CSCD
北大核心
2009年第4期67-70,共4页
Instrument Technique and Sensor
