连续小波变换开关电流电路的实现  

Implementation of Continuous Wavelet Transform Using Switched-Current Circuit

作　　者：赵文山[1] 何怡刚[1] 晏进喜[1] 李必安[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《半导体技术》2006年第4期295-299,共5页Semiconductor Technology

基　　金：国家自然科学基金项目(.50277010);湖南省杰出青年基金(03JJY1010);高校博士点基金(20020532016);湖南省科技计划项目(03GKY3115;04FJ2003;05GK2005)

摘　　要：提出了一种用开关电流电路实现连续小波变换的方法,将连续小波变换转化为用带通滤波器组对信号进行处理,并用开关电流电路实现该带通滤波器组。文章采用基于第二代开关电流技术的带通滤波器组实现了8通道的Marr小波。仿真结果表明该滤波器组具有恒Q值,且每个带通滤波器的中心频率与理论值大致相符,从而证实了该方法的可行性。A method of implementing continuous wavelet transform using switched-current circuit is proposed. Substitute bandpass filters were used for the continuous wavelet transform to carry out the signal processing, and implement these filters with switched-current circuits. The eight channels of Marr wavelet are implemented by the bandpass filters based second-generation switched-current technology. The feasibility of this approach is verified by the simulation result, which indicates that these filters have constant Q, and the center frequency of every bandpass filter is agreed with the theoretical analysis.

关 键 词：开关电流电路 连续小波变换 带通滤波器 频率翘曲效应 

分 类 号：TN43[电子电信—微电子学与固体电子学]