基于DDS芯片的信号源应用设计  

Application and design of signal generator based on DDS chip

作　　者：刘明成[1] 孙景瑞[1] 武津城[1] 

机构地区：[1]天津师范大学物理与电子信息学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2008年第4期66-68,共3页Journal of Tianjin Normal University：Natural Science Edition

基　　金：天津市教委基金项目(20041326)

摘　　要：结合DDS器件AD9854的结构原理和功能特点,设计了利用AVR单片机ATmega 128控制AD9854实现的程控信号源电路,并针对ATmega 128与AD9854之间的硬件接口电路和键盘控制电路,设计了可方便实现对信号源输出频率、相位以及信号源工作模式的控制,使之输出高稳定度、高分辨率的信号.According to the construction principle and functional characteristics of AD9854 which is designed using advanced direct digital synthesis （DDS） technology, a programmable signal generator in which the chip AD9854 is controlled by AVR singlechip of ATmega 128 is designed. By using the hardware interface circuit and the keyboard control circuit, frequency and phase of the outcoming signal and working model of the signal generator can be con- trolled conveniently, and the outcoming signal has high stability and high resolution.

关 键 词：DDS AD9854 AVR单片机 ATMEGA128 

分 类 号：TN742.1[电子电信—电路与系统]