基于电阻网络的信号发生器设计  

Design of signal source based on resistance network

作　　者：王秀华[1] 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070

出　　处：《自动化与仪器仪表》2011年第6期61-62,共2页Automation & Instrumentation

摘　　要：设计了一种基于单片机和R-2 R梯形网络的低频信号源。该信号源采用数字频率合成技术实现频率合成功能,可以产生频率可调的正弦波、三角波、方波、F S K等波形,且输出信号的稳定度、幅度、失真度均可满足要求。重点分析了其软硬件设计以及杂散产生的原因及解决办法。A new low frequency signal source based on the MCU and R-2R ladder is designed with using digital frequency synthesis（DDS） technology.This signal source can generate sine wave,triangle wave,rectangle wave,FSK wave etc and their frequency can be adjustable.Test result shows that the stability of output signal,the wave voltage amplitude and total harmonious distortion all have good performance.Mainly analyses the design of hardware and software.The reason of the spurious generating is also analyzed and the settle method is provided.

关 键 词：信号源 R-2R DDS 杂散 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]