| 多功能计数器的设计 |
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| 引用本文： | 佘景希,邵波,伍玉.多功能计数器的设计[J].国外电子元器件,2009,17(5):18-19,23. |
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| 作者姓名： | 佘景希 邵波 伍玉 |
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| 作者单位： | 武汉大学电子信息学院;武汉大学国际软件学院; |
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| 摘 要： | 该系统由单片机89S52控制模块,程控宽带放大模块,整形模块,FPGA内频率、相位差测量模块等构成,采用等精度测频法测出频率和周期,可测量有效值为0.01～5 V,频率范围1 Hz～20 MHz信号的频率、周期信号,精度高达10-6。采用计数法测量相位差,该系统可测量有效值0.5～5 V,频率10 Hz～100 kHz信号的相位差,精度为1°。系统功能由按键控制,测量结果实时显示,人机界面友好。
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| 关 键 词： | 测频 测相 等精度测频法 程控放大 |
Design of multi-functional counter |
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| SHE Jing-xi,SHAO Bo,WU Yu.Design of multi-functional counter[J].International Electronic Elements,2009,17(5):18-19,23. |
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| Authors: | SHE Jing-xi SHAO Bo WU Yu |
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| Affiliation: | 1.School of Electronic Information;Wuhan University;Wuhan 430079;China;2.School of International Software;China |
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| Abstract: | The system consists of the following functional blocks:89S52 microcontroller controlling module,programmable amplifier module,comparator module,frequency and phase difference testing module in the FPGA.The system use the equal accuracy frequency-examining technique it measures frequency and circle of signal which its ranges is from 1Hz to 20 MHz and the amplitude of which its range is from 0.01Vrms to 5Vrms,precision is up to 10-6.Using of count method,the system detects the phase difference of signal,the a... |
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| Keywords: | frequency measurement phase measurment equal precision frequency-measurment method programmable amplifier |
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