一种高精度信号源的设计

信号源是现代电子系统的重要组成部分,目前电子测量仪器对信号源的频率稳定度和准确度的要求越来越高,频率合成技术成为目前研制信号源的关键技术;文中介绍了一种基于直接数字频率合成技术的信号源的实现,信号产生选用DDS专用芯片AD9852;介绍了系统的总体方案,详细论述了信号产生模块、人机交互模块和控制与数据处理模块的设计与实现,并给出了软件控制框图;利用该技术研制的信号源精度高、频率范围宽,结构简单、使用方便、交互性好,性能稳定可靠。

Design of A High Accurate Signal Generator

Signal generator is an important component in modern electronic system.The requirements of frequent accuracy and stabiliza- tion of the signal generator is increasing.Technology of frequency synthesize is important in designing signal generator.The paper introduces a signal generator based on the DDS chip AD9852.The design of the whole system,the signal generating module,man-machine interactive module,control and data processing module and the software flow are mainly discussed.The signal generator adopts DDS technology to gen- erate high accuracy and wide frequency range signal.The system achieves concise structure,convenience usage and stable and reliable per- formance.