用AD7008构成可程控正弦波信号发生器  

A Program Controlled Sine-wave Signal Generator Based on AD7008

作　　者：邹轶才[1] 黄正东 

机构地区：[1]武汉理工大学自动化学院,武汉430063 [2]广州港集团公司新港分公司,广州510730

出　　处：《中国仪器仪表》2005年第2期74-76,共3页China Instrumentation

摘　　要：本文介绍一种以AS7008为核心的正弦波信号发生器。正弦信号的频率和幅度通过单片机来定。AD7008的输出信号通过一个由MAX262构成的程控带通滤波器进行滤波处理,程控滤波器的中心率f0和Q值由单片机根据正弦信号的频率来设定。DDS是近几年发展起来的新型频率合成技术,具有为广阔的应用前景。A kind of sine-wave signal generator based on AD7008 is introduced in this paper. We can set the frequency and amplitude of sine-wave signal through single-chip processor.The output signal of AD7008 is filtered by a program controlled band-pass filter based on MAX262,the center frequency and Q of this filter are determined by the frequency of sine-wave through single-chip processor. DDS is a new frequency-synthesis technology developed in recent years,it has a bright prospect.

关 键 词：正弦波信号发生器 正弦信号 频率合成技术 带通滤波器 程控 DDS Q值 单片机 幅度 中心频率 

分 类 号：TM935[电气工程—电力电子与电力传动]