| 基于89C55和FPGA的频率特性测试仪 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 李璐 李腾飞 李飞飞 |
| |
| 作者单位： | 武汉大学电子信息学院,湖北,武汉,430079 |
| |
| 摘 要： | 为了能够直接显示待测网络的幅频相频特性，设计了一个以89C55和FPGA构成的最小系统为控制核心的频率特性测试仪。系统基于DDS（直接数字频率合成）原理和多周期同步计数相位测量法，由信号发生器，被测双T网络，真有效值检波，相位检测，LCD显示及幅频特性曲线显示等部分构成。其中，信号发生和相位检测在FPGA内部实现。用户可通过按键输入需求，频率特性曲线实时显示于示波器上。整个系统性能稳定，界面友好，操作简单，实现了数字化频率特性分析。
|
| 关 键 词： | 89C55 FPGA DDS 真有效值检波 相位测量 |
Frequency Characteristic Tester Based on 89C55 and FPGA |
| |
| LI Lu,LI Teng-fei,LI Fei-fei.Frequency Characteristic Tester Based on 89C55 and FPGA[J].Modern Electronic Technique,2011,34(14):179-182. |
| |
| Authors: | LI Lu LI Teng-fei LI Fei-fei |
| |
| Institution: | LI Lu,LI Teng-fei,LI Fei-fei(School of Electronic Information,Wuhan University,Wuhan 430079,China) |
| |
| 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 d... |
| |
| Keywords: | 89C55 FPGA DDS RMS detection phase detection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
