| 基于单片机与AD9851的信号发生器 |
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| 引用本文： | 陈小桥,黄恩民,张雪滨,吴晓潭,葛文丽.基于单片机与AD9851的信号发生器[J].实验室研究与探索,2011,30(8):98-102. |
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| 作者姓名： | 陈小桥 黄恩民 张雪滨 吴晓潭 葛文丽 |
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| 作者单位： | 1. 武汉大学电子信息学院,湖北武汉,430079
2. 河南省濮阳供电公司,河南濮阳,457000 |
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| 摘 要： | 基于直接数字频率合成(DDS)原理,以单片机AT89S52为控制核心,结合现场可编程门阵列(FPGA),利用DDS集成芯片AD9851实现了在1 Hz～20 MHz的正弦信号发生器。AD9851输出的信号通过滤波、自动增益控制、功率放大后,在输出为50Ω负载的条件下,输出电压峰峰值可达10 V。此外,本系统还附有输出AM、FM、ASK、PSK、FSK等多种调制信号的功能。信号信噪比高,驱动能力强;系统复杂度低,易于在实验室中自制使用。
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| 关 键 词： | 正弦信号 AD9851 直接数字频率合成 数字调制 |
Siginal Generator Based on MCU and AD9851 |
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| CHEN Xiao-qiao,HUANG En-min,ZHANG Xue-bin,WU Xiao-tan,GE Wen-li.Siginal Generator Based on MCU and AD9851[J].Laboratory Research and Exploration,2011,30(8):98-102. |
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| Authors: | CHEN Xiao-qiao HUANG En-min ZHANG Xue-bin WU Xiao-tan GE Wen-li |
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| Institution: | CHEN Xiao-qiao1,HUANG En-min1,ZHANG Xue-bin1,WU Xiao-tan1,GE Wen-li2 (1.Electronic and Information School,Wuhan University,Wuhan 430079,China,2.Power Company of Puyang,Puyang,457000,China) |
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| Abstract: | This system is based on the theory of direct digital synthesis(DDS),adopting t he high performance chip of AD9851 that uses advanced DDS technology to generate perfect sine signals with the frequency range from 1 Hz to 20 MHz.The system t akes a single chip(AT89S52) as the control core,and combines the field program mable gate array(FPGA).The sine wave generated by AD9851 takes through the AGC and PGA to achieve the steady output and the programming control of the treads o f the amplitude modulation(AM) sig... |
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| Keywords: | sinewave AD9851 direct digital synthesis(DDS) digital modulation |
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