在用SPICE程序对采样保持电路进行瞬态特性的模拟过程中,我们发现SPICE程序中的脉冲源PULSE(V1 V2 TD TR TF TW PER)(1)的输出特性具有一些有趣的性质.在式(1)中,参数V1、V2、TD、TR、TF、TW、PER分别表示该脉冲源的初始值、波动值、延迟时间、上升时间、下降时间、脉冲宽度和脉冲周期.为了研究式(1)所示的脉冲源的输出特性,我们 In the simulation of the transient characteristics of the sample-and-hold circuit using the SPICE program, we found that the output characteristics of the pulse source PULSE (V1 V2 TD TR TF TW PER) (1) in the SPICE program have some interesting properties. 1), the parameters V1, V2, TD, TR, TF, TW and PER represent the initial value, the fluctuation value, the delay time, the rise time, the fall time, the pulse width and the pulse period of the pulse source respectively. ) Shows the output characteristics of the pulse source, we