| 频率相位可调的信号源设计 |
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| 引用本文： | 章晓眉,赵冬娥,冯彦君,管敏杰.频率相位可调的信号源设计[J].电声技术,2011,35(11):33-35. |
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| 作者姓名： | 章晓眉 赵冬娥 冯彦君 管敏杰 |
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| 作者单位： | 中北大学电子测试技术国家重点实验室,山西太原030051;中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 |
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| 摘 要： | 提出了一种直接基于DDS芯片AD9851的信号源的设计方法.介绍了DDS模块的设计,并给出了DDS与FPGA接口电路、DDS信号互补输出电路、DDS七阶低通椭圆滤波电路、DDS信号缓冲放大电路、DDS晶振电路.通过FPGA控制DDS并直接向DDS发送频率控制字,产生常见的正弦波、方波,并实现了频率与相位可调.
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| 关 键 词： | DDS FPGA 晶振 正弦波 |
Variable Frequency and Phase of the Signal Source Design |
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| ZHANG Xiaomei,ZHAO Donge,FENG Yanjun,GUAN Minjie.Variable Frequency and Phase of the Signal Source Design[J].Audio Engineering,2011,35(11):33-35. |
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| Authors: | ZHANG Xiaomei ZHAO Donge FENG Yanjun GUAN Minjie |
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| Affiliation: | ( a. Science and Technology on Electronic Test ＆ Measurement Laboratory ; b. Key Laboratory of Instrumentation Science ＆ Dynamic Measurement ( Ministry of Education), North University of China, Taiyuan 030051, China) |
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| Abstract: | A direct signal source design method based on DDS chip AD9851 is presented. The DDS module design is introduced, and the DDS and FPGA interface circuit, DDS signal complementary output circuit, DDS seven order elliptic low pass filter circuit, DDS signal buffer amplifier circuit, DDS oscillator circuit are given. With this method, it can control the DDS and send the control words to it through FPGA . It can generate the common wave including sine - wave, square - wave and change the frequent and the phase you want easily. |
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| Keywords: | DDS FPGA oscillator Sine wave |
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