| 用于混频信号的双通道数字锁相放大器 |
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| 引用本文： | 王超, 徐明, 徐真真, 王化祥,.用于混频信号的双通道数字锁相放大器[J].电子器件,2007,30(4):1321-1324. |
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| 作者姓名： | 王超 徐明 徐真真 王化祥 |
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| 作者单位： | 天津大学电气与自动化学院,天津,300072 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金 |
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| 摘 要： | 为了实现对混频信号的高速采样和同步处理,提出了一种采用正交数字解调算法的双通道数字锁相放大器.系统结构基于数字信号处理器(DSP)及其配合的硬件,并采用增强并口(EPP)协议,实现了DSP同PC机的双向高速通信.实验验证了该系统的可行性.
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| 关 键 词： | 数字锁相放大器 混频 正交数字解调 数字信号处理器 增强并口 双通道 |
| 文章编号： | 1005-9490（2007）04-1321-04 |
| 修稿时间： | 2006-07-23 |
Dual-Channel Digital Lock-in Amplifier for Mixing Frequency Signal |
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| WANG Chao,XU Ming,XU Zhen-zhen,WANG Hua-xiang.Dual-Channel Digital Lock-in Amplifier for Mixing Frequency Signal[J].Journal of Electron Devices,2007,30(4):1321-1324. |
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| Authors: | WANG Chao XU Ming XU Zhen-zhen WANG Hua-xiang |
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| Affiliation: | School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072,China |
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| Abstract: | In order to sample mixing frequency signals in high speed and process them synchronously,a dual-channel digital lock-in amplifier(LIA) that uses orthogonal digital demodulation is proposed.The instrument,based on a digital signal processor(DSP) and its associated hardware,is implemented.The system adopts a method of high speed bi-directional parallel communication between DSP and parallel interface of PC by Enhanced Parallel Port(EPP) protocol.The experimental tests proved that the system is feasible. |
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| Keywords: | digital lock-in amplifier mixing orthogonal digital demodulation digital signal processor enhanced parallel port dual-channel |
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