脉冲上升时间与传输系统带宽关系的仿真分析

Simulation and Analysis of Relation between Pulse Rise Time and Bandwidth of Transmission System

本文提出了一种基于MATLAB仿真测试模型来分析脉冲上升时间与传输系统带宽之间关系的方法,解决了具有高阶滤波特性的传输系统难于用解析方法分析上升时间的难题,分析了脉冲上升时间与四种在实际电路设计中常用的低通滤波器带宽之间的关系,讨论了低通滤波器级联系统输出脉冲上升时间的近似计算公式和仿真测试方法。

It is difficulty to analyze pulse rise time of transmission system with high order filtering characteristics by using of analytical method. Based on MATLAB simulation test model, an approach which is designed to analyze the relationship between the pulse rise time and the bandwidth of the transmission system is presented to overcome this difficulty. The relations between the pulse rise time and the bandwidth of four types of low pass filters which are generally used in practical design are analyzed. The approximate calculation formula and simulation test method to estimate the output pulse rise time of a cascaded low pass filter system are discussed.