摘要
本设计是以STC89C52单片机作为主控芯片,控制一片高速DDS数字频率合成器AD9850,产生两路相正交的扫频信号并实现闭环稳幅,通过D/A和A/D转换器等接口电路,实现扫频信号频率的步进调整、数字显示等。本设计克服了传统模拟扫频仪的缺点,针对目前中低频段的扫频仪比较少的现状,具有很大的应用前景。
This design is based on STC89C52 single-chip microcomputer as the master control chip, controls a lalgla-speea olgltal frequency synthesizer AD9850 DDS, produce two orthogonal frequency sweep signals, they are measured through the network to observe the changes of frequency and waveform, through D/A and A/D converter interface circuit, implement step adjustment of the frequency sweep signal frequency and digital display, etc. This design overcomes the drawback of traditional analog frequency sweep meter, aiming at the current situation of the low frequency range of frequency sweep meter is less, has great application prospect.
出处
《自动化与仪器仪表》
2014年第8期41-43,共3页
Automation & Instrumentation
