基于FPGA的正交信号发生器设计  

The Design of Orthogonal Signal Generator Based on FPGA

作　　者：杨峰[1] 文枰 

机构地区：[1]四川文理学院国有资产管理处,四川达州635000 [2]重庆大学光电工程学院,重庆沙坪坝400030

出　　处：《四川文理学院学报》2015年第5期47-49,共3页Sichuan University of Arts and Science Journal

基　　金：四川文理学院2014年度青年启动项目"GMR生物传感器专用数字锁相检测电路设计"(2014Z006Q)

摘　　要：根据直接数字频率合成(DDS)技术,设计了基于FPGA的正交信号发生器,以用于双通道微弱信号相关检测电路中.首先介绍了DDS技术的基本原理;其次采用硬件描述语言编写各个模块的代码,并对其进行功能仿真和验证;然后对各个模块进行硬件电路设计;最后对设计的正交信号发生器进行了实验测试.测试结果表明:正交信号发生器的输出信号的频率特性和相位特性具有很高的稳定性,能够满足相关检测电路的要求.According to the direct digital frequency synthesis technology, an orthogonal signal generator is designed by using FFGA chip. The purpose is to use it for dual channel weak signal correlated detection circuit. First, the basic principle of DDS technology is introduced; second, the code of each module is edit by using hardware language, and did the functional simulation; then, designed the hardware circuit of each module; finally, the experimental test has been done for the orthogonal signal generator. Experimental results show that the frequency characteristic and phase characteristic of the orthogonal signal generator＇s output signalhas very high stability and meets the requirements of the correlated detection circuit.

关 键 词：正交信号 直接数字频率合成 FPGA 

分 类 号：TN91[电子电信—通信与信息系统]