Version 4
SHEET 1 880 684
WIRE 240 96 96 96
WIRE 240 112 240 96
WIRE 96 176 96 96
WIRE 240 208 240 192
WIRE 320 208 240 208
WIRE 240 224 240 208
WIRE 320 240 320 208
WIRE 96 320 96 256
WIRE 240 320 240 304
WIRE 240 320 96 320
WIRE 320 320 320 304
WIRE 320 320 240 320
WIRE 96 336 96 320
WIRE 240 432 96 432
WIRE 240 448 240 432
WIRE 96 512 96 432
WIRE 240 544 240 528
WIRE 320 544 240 544
WIRE 320 576 320 544
WIRE 96 656 96 592
WIRE 320 656 320 640
WIRE 320 656 96 656
WIRE 96 672 96 656
FLAG 96 336 0
FLAG 320 208 1
FLAG 96 672 0
FLAG 320 544 2
SYMBOL voltage 96 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value {vin}
SYMBOL res 224 96 R0
SYMATTR InstName R1
SYMATTR Value {r1}
SYMBOL res 224 208 R0
SYMATTR InstName R2
SYMATTR Value {r2}
SYMBOL cap 304 240 R0
SYMATTR InstName C1
SYMATTR Value 500µ
SYMBOL voltage 96 496 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value {vth}
SYMBOL res 224 432 R0
SYMATTR InstName R3
SYMATTR Value {rth}
SYMBOL cap 304 576 R0
SYMATTR InstName C2
SYMATTR Value 500µ
TEXT 96 64 Left 2 !.param R1=10, R2=100
TEXT 96 48 Left 2 !.param Vin=10
TEXT 96 392 Left 2 !.param Vth=Vin*R2/(R1+R2)
TEXT 96 408 Left 2 !.param Rth=R1*R2/(R1+R2)
TEXT 96 0 Left 2 !.tran 0 25m 0 1u startup