| 基于DDS技术的高速等效采样示波器设计 |
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| 引用本文： | 刘瑞华,何明,乔龙飞,许朋,雷莉.基于DDS技术的高速等效采样示波器设计[J].实验室研究与探索,2011,30(9):58-62. |
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| 作者姓名： | 刘瑞华 何明 乔龙飞 许朋 雷莉 |
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| 作者单位： | 1. 河南省濮阳供电公司,河南濮阳,457000
2. 武汉大学电子信息学院,湖北武汉,430079 |
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| 摘 要： | 为了更好地实现对高频周期信号的采样,设计了基于DDS技术高速等效采样的数字示波器,以不大于1 MHz的实时采样率实现了最高2.5 GHz的等效采样率。系统电路以CycloneIII FPGA芯片为核心,结合外围器件,完成了测量频率范围10 Hz～15 MHz,输入信号范围2 mV～16 V,水平显示分辨率25点/div,垂直灵敏度包括2 V/div、2 mV/div共10档可调,实时采样与等效采样相结合的数字存储示波器。本设计电路结构简单,以低速AD实现了高速信号的采集,实现方案新颖。
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| 关 键 词： | 等效采样 直接数字频率合成 数字存储示波器 |
Design of High-Speed Sampling Oscilloscope Based on DDS |
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| LIU Rui-hua,HE Ming,QIAO Long-fei,XUPeng,LEI Li.Design of High-Speed Sampling Oscilloscope Based on DDS[J].Laboratory Research and Exploration,2011,30(9):58-62. |
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| Authors: | LIU Rui-hua HE Ming QIAO Long-fei XUPeng LEI Li |
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| Institution: | LIU Rui-hua1,HE Ming2,QIAO Long-fei2,XU Peng2,LEI Li2(1.Power Company of Puyang,Puyang 457000,China,2.Electronic and Information School,Wuhan University,Wuhan 430079,China) |
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| Abstract: | In order to achieve the sampling of high-frequency signal,this system,based on the DDS technology,to designed a high-speed equivalent sampling digital oscilloscope,realizing 2.5 GHz equivalent sampling with less than 1 MHz.This circuit uses the CycloneIII FPGA chip as the core and combines the peripheral devices together to complete a real-time and equivalent sampling digital storage oscilloscope,which can measure the signal ranging from 10 Hz to 15 MHz,2 mV to 16 V,and include the horizontal display of 25 ... |
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| Keywords: | equivalent sampling DDS digital storage oscilloscope |
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