现代电子技术2011，Vol.34Issue(14)：179-182,4.
基于89C55和FPGA的频率特性测试仪
Frequency Characteristic Tester Based on 89C55 and FPGA
李璐 1李腾飞 1李飞飞1
作者信息
- 1. 武汉大学电子信息学院,湖北,武汉,430079
- 折叠
摘要
Abstract
In order to show the amplitude-frequency phase-frequency characteristics of the network under test directly, a frequency tester using 89C55 and FPGA as control core is designed. The system is based on DDS (Direct Digital Synthesis) principle and multi-cycle synchronous counting phase measurement method, and consists of the signal generator, the measured double-T network, RMS detection, phase detection, LCD display and amplitude-frequency characteristic curve display parts.Among them, the signal generator and phase detection is realized in FPGA. Users can use key to input demand and the frequency characteristic curve can be displayed on the oscilloscope real-timly. The entire system has stable performance, friendly interface and simple operation. It has achieved the digital frequency analysis.关键词
89C55/FPGA/DDS/真有效值检波/相位测量Key words
89C55/ FPGA/ DDS/ RMS detection/ phase detection分类
信息技术与安全科学引用本文复制引用
李璐,李腾飞,李飞飞..基于89C55和FPGA的频率特性测试仪[J].现代电子技术,2011,34(14):179-182,4.
