LTspice

LTspice introduction - 8 LPF的瞬态响应(switch) 

Version 4
SHEET 1 1672 680
WIRE 64 160 -16 160
WIRE 208 160 144 160
WIRE -16 192 -16 160
WIRE 208 192 208 160
WIRE -16 320 -16 272
WIRE 208 320 208 256
WIRE 208 320 -16 320
WIRE -16 336 -16 320
FLAG -16 336 0
SYMBOL cap 192 192 R0
SYMATTR InstName C1
SYMATTR Value 10nF
SYMBOL res 160 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL voltage -16 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PWL(0 0 1n 1 1m 1 1.000001m 0)
TEXT 224 360 Left 2 !.tran 2ms
TEXT 504 160 Left 2 ;transient simulation in the time domain and let the input voltage jump in a very short time from 0 to +1V.\nPWL: define the value for specified time;\nthe thrid point is: 1 milisencond still maintain 1 vlotage;\nthe forth point is: 1.000001 milisencond quickly drop to vlotage;

将以上内容保存成1RC_lowpass_transient_switch.asc文件，然后执行Run进行仿真，结果如下：