一种新型双通道数字锁相放大器

2009 International Asia Conference on Informatics in Control, Automation and Robotics Pub Date : 2009-02-01 DOI:10.1109/CAR.2009.24

Dongyue Wu, Chao Wang, Hongjun Sun, Huaxiang Wang

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引用次数: 7

摘要

为了实现双通道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的双通道高速数字锁相放大器(LIA)。该仪器基于数字信号处理器(DSP)及其相关硬件实现。该系统采用EPP (Enhanced parallel Port)协议实现DSP与PC机并行接口的高速双向并行通信。EPP实现了易于安装的工业应用。实验结果表明，该系统是可行的。

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A Novel Digital Lock-in Amplifier with Dual Channels

In order to sample two channels mixing frequency signals in high speed and process them synchronously in the system, a dual-channel, high-speed 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 EPP (Enhanced Parallel Port) protocol. The EPP achieves an easy installation for industrial applications. The experimental tests showed that the system is feasible.

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来源期刊

2009 International Asia Conference on Informatics in Control, Automation and Robotics

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