一种低频阻抗参数测量用程控正弦信号源  

A Kind of Programming-controlled Sine Signal Source Used in Low Frequency Impedance Parameter Measuring

作　　者：王桂星[1] 冯泽民[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226019

出　　处：《南通大学学报（自然科学版）》2007年第3期72-75,共4页Journal of Nantong University(Natural Science Edition)　

基　　金：南通大学自然科学基金资助项目(05Z039)

摘　　要：介绍了一种在低频阻抗参数测量中使用的精密程控正弦信号源,并分析其工作原理.该信号源采用晶体振荡器产生基准信号,利用锁相环技术合成频率、DDS技术产生数字正弦波、有源滤波技术输出正弦信号.结果表明,所设计的信号发生器在100 Hz～20 kHz的频率范围内具有数百个可程控的点频信号,输出的正弦信号频率稳定度高、波形失真度小.This paper described a kind of precise programming-controlled sine signal source used in low frequency impedance parameter measuring, and analyzed its principles. The signal source makes reference signal with crystal oscillator, synthesizes frequency with phase locked loop technology, produces digital sine-wave with DDS technology and outputs sine signal with active power filtering technology. The results showed that the designed signal generator provided hundreds of programmable frequency signal points in the frequency range of 100 Hz~ 20 KHz and had high frequency stability and low wave distortion.

关 键 词：正弦信号 锁相环 DDS 低通滤波 

分 类 号：TN911.7[电子电信—通信与信息系统]