基于对数域无损积分器的高阶滤波器设计  

The Design of Higher Order Log-Domain Filter Based on Lossless Integrators

作　　者：曹丽华[1] 彭良玉[1] 黄满池[1] 

机构地区：[1]湖南师范大学物理与信息科学学院,湖南长沙410081

出　　处：《电气电子教学学报》2007年第2期55-58,共4页Journal of Electrical and Electronic Education

基　　金：湖南省教育厅资助项目(05C404)

摘　　要：提出利用双极型晶体管构成的对数域无损积分器以及对数压缩和指数扩展电路实现高阶滤波器.基于无源网络模拟,该设计不仅方法简单,而且使用元件种类很少,易于集成给出一个6阶Butterworth带通滤波器设计实例。PSpice仿真结果表明,该对数域滤波器能在低电压条件下工作,并具有高频、宽调谐范围和低失真等特性。A novel design of higher-order filters based on log-domain lossless integrators, log compressing and exponential expanding circuits using bipolar junction transistors. By means of passive simulation, this design is not only easy but also has a few kinds of elements. A sixth-order Butterworth band-pass filter is designed by this method, and the PSpice simulation of this filter shows that, the log-domain filter has high frequency, large tuning range and low distortion and can operate under low-voltage.

关 键 词：对数域 无损积分器 高阶滤波器 

分 类 号：TN713[电子电信—电路与系统]