摘要
分析了数字合成法所得的正弦波的谐波情况 ,基于数字合成加可编程滤波技术设计了一个总谐波失真低、幅值和频率可编程控制的波形发生器 .由此形成的电阻抗断层成像系统在物理模型上进行了成像数据的测量 。
With the analysis of harmonic distortion condition of digital sin wave synthesize technology,a multi- frequency waveform generator based on digital synthetic plus programm able filter m ethod has been developed. With a low total harm onic distortion (THD) and the programmable frequency and am plitude,a set of data is acquired and good imaging results is obtained by corresponding EIT system
出处
《医学争鸣》
CAS
1998年第S1期4-6,共3页
Negative
基金
九五国家重点攻关课题! No. 96 -92 0 -12 -0 4
关键词
波形发生器
数字合成
总谐波失真
waveform generator digital synthesize total harmonic distortion
