基于AD9858的宽带正交信号产生技术的研究  

Research of Generating Wideband I/Q Signal Based on AD9858

作　　者：徐媛媛[1] 吴援明[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《现代电子技术》2007年第7期12-14,共3页Modern Electronics Technique

摘　　要：在正交调制与解调等许多电路中,都需要一对正交的信号。而传统的正交信号的产生方法都存在很多弊端,因此选用内部时钟可高达1 GHz的高性能直接数字合成芯片AD9858作为核心器件,采用FPGA控制AD9858的设计方案产生高达400 Hz的宽带正交信号。同时详细阐述了用该方法产生正交信号的原理、硬件电路设计及调试。Many modulation and demodulation circuits need in- phase and quadrature- phase （I/Q）signals. Traditionally, the methods of generating I/Q signals have many disadvantages. So DDS chip AD9858 of high- performance characteristics, produced by Analog Device Inc,is introduced in this paper. AD9858, as a core device,is adopted to generate 400MHz wideband I/Q signal by the control of FPGA. And the principles of generating I/Q signal,as well as designing and debugging circuit are also detailed in this paper.

关 键 词：频率合成 AD9858 FPGA DDS 

分 类 号：TN74[电子电信—电路与系统]