基于AD9850的可编程信号发生器的设计  

Design of Programmable Oscillator Based on AD9850

作　　者：严新忠[1] 郭略[1] 杨静[1] 何静[1] 

机构地区：[1]天津科技大学电子信息与自动化学院,天津300222

出　　处：《计算机测量与控制》2006年第9期1272-1274,共3页Computer Measurement &Control

摘　　要：现代科研、通信系统、教学试验以及各种电子测量技术等场合需要高精度、频率可变的信号源;以DDS芯片AD9850为核心设计的一种幅度、相位、频率都可调节的信号发生器,其频率调节范围为1kHz～10MHz;频率步进1Hz,10Hz,100Hz,1kHz可键盘设定;幅度调节精度可达0．01V,相位可实现精度为11．25°的调节;测试结果表明该设计方案可行,样机达到设计要求,各参数调节可靠,工作稳定。Signal source with high precision and changeable frequency is needed in modern scientific research, communication system, teaching apparatus, electronic measurement and so on. This paper explicates the realization of the signal source based on AD9850 DDS （Di- rect Digital Synthesize） chip. The frequency range is from lkHz to 10kHz and the step range of frequency can be the 1Hz , 10Hz , 100Hz , lkHz. The precision of amplitude is 0.01V and the phase is also adjustable with the step 11.25°. These parameters can be set and modulated by keyboard. The testing results indicated that this design is feasible and reliable.

关 键 词：信号发生器 AD9850 MCU ICL8038 

分 类 号：TP346[自动化与计算机技术—计算机系统结构]