| 一款开关同步检波电路的设计 |
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| 引用本文： | 张晓飞, 董浩斌, 鲁永康, 常莉,. 一款开关同步检波电路的设计[J]. 电子器件, 2008, 31(6) |
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| 作者姓名： | 张晓飞 董浩斌 鲁永康 常莉 |
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| 作者单位： | 中国地质大学机械与电子信息学院,武汉,430074;中国地质大学机械与电子信息学院,武汉,430074;中国地质大学机械与电子信息学院,武汉,430074;中国地质大学机械与电子信息学院,武汉,430074 |
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| 摘 要： | 阐述了开关式同步检波电路的总体结构及各模块的功能特点,对开关式同步检波电路的实现进行了论述.在用分立元件组成的低噪声前置放大器的基础上,利用电压比较器AD790及模拟开关74HC4053的高速特性设计与制作了一款开关式同步检波电路,对电路的测试结果表明,电路具有动态范围大、良好的线性及较小的测量误差,对检测微弱信号的下限可达1μV,是一种性能良好的相敏检波电路,适用于对低频微弱信号的检测.
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| 关 键 词： | 高速电压比较器 高速模拟开关 开关式同步检波器 低噪声前置放大器 相敏检波 |
Design of On-Off Synchronous Demodulation Circuit |
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| ZHANG Xiao-fei,DONG Hao-bin,LU Yong-kang,CHANG Li. Design of On-Off Synchronous Demodulation Circuit[J]. Journal of Electron Devices, 2008, 31(6) |
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| Authors: | ZHANG Xiao-fei DONG Hao-bin LU Yong-kang CHANG Li |
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| Affiliation: | ZHANG Xiao-fei,DONG Hao-bin,LU Yong-kang,CHANG Li(Faculty of Mechanical & Electronic Information,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | The overall structure of the on-off synchronous demodulation circuit and the features of the every part of the circuit were elaborated,the implementation of the on-off synchronous demodulation circuit was discussed also.On the base of using discrete components in the composition of the low-noise preamplifier,a kind of synchronous demodulation circuit which utilizes the high speed characteristics of voltage comparator AD790 and analog switch 74HC4053 is presented.The test result shows that the circuit is a g... |
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| Keywords: | high speed voltage comparator high analog switch on-off synchronous demodulation Low noise pre-amplifier phase sensitive detector |
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