当求解线性系统的零状态响应时,根据门函数响应法,首先将系统的输入量x(t)分解为一系列宽度T在连续变化的门函数的代数和。若以变换的形式来表示,也就是将输入量x(t)变换成一系列宽谱密度为x′(T)=x′(t)的门函数沿着T轴从0到t的积分路线的连续和,并可写成如下形式 When solving the zero-state response of a linear system, the input function x (t) of the system is first decomposed into a series of algebraic sum of the gate functions with varying width T in accordance with the gated response method. (T) is transformed into a series of linear functions of a gate function with wide channel density x ’(T) = x’ (t) along the T axis from 0 to t Continuous and, and can be written as follows