摘要
本文提出了一种以直接数字频率合成(DDS)技术为基础的信号发生器的设计。采用单片机AT89C51控制DDS芯片AD9850产生频率可调的正弦信号,并通过低通滤波器得到纯正的信号,最后经过功率放大驱动电路输出目标信号。该信号发生器用在变压器绕组变形测试仪中,用来产生频率自动可调的1KHZ-1MHZ的扫频信号。发生器具有频率精度高,频率范围宽,操作快捷方便等优点。
A kind of intelligent signal generator based on direct digital synthesizer technology is proposed in my paper. MCU AT89C51 is adopted to control DDS chip AD9850 to produce the sine signal which frequency may be adjusted. The pure signal can be obtained through the low pass filter,and then target signal is drove by the power amplifier. The signal generator was applied to measure instrument of deformation of power transformer windings for generating the sine signal which frequency during 1KHZ-1MHZ is able to be adjusted automatically. This generator,has such advantages as high frequency precision,wide frequency range,and quickly facilitate and so on.
出处
《微计算机信息》
北大核心
2007年第04Z期298-299,301,共3页
Control & Automation
基金
基于GSM的农业温室参数检测及专家咨询装置的研制
河北省科技厅(04213528)
