| 基于DDS的频率特性测试仪的设计 |
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| 引用本文： | 沈放,谢风连.基于DDS的频率特性测试仪的设计[J].科技广场,2011(3). |
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| 作者姓名： | 沈放 谢风连 |
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| 作者单位： | 南昌大学科学技术学院,江西,南昌,330029 |
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| 摘 要： | 本文频率特性测试仪采用单片机最小系统为控制核心,由正弦信号发生器、数据采集存储、处理、显示等功能模块组成,通过键盘控制来实现幅频特性的测量,包括参数预置、点测结果的显示,以及用普通示波器显示幅频特性曲线。系统采用数字控制DDS芯片AD9850产生100Hz～100KHz正弦信号,频率值与步长均能灵活准确地预置,被测网络采用有源带通双T网络,中心频率及带宽均达到要求。
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| 关 键 词： | DDS 椭圆低通滤波 双T网络 幅频特性 |
Design of Frequency Characteristics Tester Based on DDS |
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| Shen Fang,Me Fenglian.Design of Frequency Characteristics Tester Based on DDS[J].Science Mosaic,2011(3). |
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| Authors: | Shen Fang Me Fenglian |
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| Institution: | Shen Fang Xie Fenglian(College of Science and Technology,Nanchang University,Jiangxi Nanchang 330029) |
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| Abstract: | The frequency characteristics tester with minimum system for the control of microcontroller core,the sine signal generator,data acquisition,storage,processing,display and other functional modules,through the keyboard control to achieve the frequency characteristics of the measurements,including parameters preset,point test results display,and using an ordinary oscilloscope display amplitude-frequency characteristic curve.System uses DDS chip AD9850 digital control with 100Hz~100KHz sinusoidal signal,frequen... |
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| Keywords: | DDS Elliptic Low Pass Filter Double-T Network The Amplitude Frequency Characteristics |
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