| 基于单片机控制的DDS信号源设计 |
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| 引用本文： | 查荣. 基于单片机控制的DDS信号源设计[J]. 机械制造与自动化, 2011, 40(1): 135-137 |
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| 作者姓名： | 查荣 |
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| 作者单位： | 无锡工艺职业技术学院,江苏,宜兴,214206 |
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| 摘 要： | 介绍了直接数字频率合成(DDS)信号源的设计.该系统分成3个主要模块,分别是:直接数字频率模块,键盘和LCD控制模块和低通椭圆滤波模块.基于单片机有足够的空闲输入输出引脚,DDS模块中的AD9851采用并行工作模式.在低通椭圆滤波模块,采用了基于反归一法设计的截止频率为25 MHz的低通椭圆滤波器.最后附上了电路图和系...
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| 关 键 词： | 直接数字频率合成器 AD9851 椭圆低通滤波器 |
Design of DDS Signal Source Based on MCU |
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| ZHA Rong. Design of DDS Signal Source Based on MCU[J]. Machine Building & Automation, 2011, 40(1): 135-137 |
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| Authors: | ZHA Rong |
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| Affiliation: | ZHA Rong(Wuxi Institute of Arts and Technology,Yixin 214206,China) |
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| Abstract: | In this paper,a design of signal source of direct digital frequency synthesis(DDS) is presented.The system is divided into three main modules;DDS module,keyboard and LCD control module and low-pass elliptic filter module.In DDS module,AD9851 is designed to work in parallel mode for the MCU which can provide enough free I/O pins for it.In low-pass elliptic filter module,a new design of a low pass filter of 25MHz of cut-off frequency is proposed by antinormalization.The circuit diagram and waveform diagram of... |
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| Keywords: | AD9851 |
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