Version 4
SHEET 1 880 680
WIRE 464 -16 352 -16
WIRE -336 0 -592 0
WIRE -160 0 -256 0
WIRE -112 0 -160 0
WIRE -64 0 -112 0
WIRE 80 0 16 0
WIRE 352 32 352 -16
WIRE -592 48 -592 0
WIRE -160 64 -160 0
WIRE 80 64 80 0
WIRE 352 160 352 112
WIRE -592 176 -592 128
WIRE -160 176 -160 128
WIRE 80 176 80 128
FLAG -592 176 0
FLAG 80 176 0
FLAG -160 176 0
FLAG -112 0 1
FLAG 80 0 2
FLAG 352 160 0
FLAG 464 -16 ErsteAbl
SYMBOL voltage -592 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 1n 1n)
SYMBOL res -352 -16 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL cap 64 64 R0
SYMATTR InstName C1
SYMATTR Value 5m
SYMBOL res -80 -16 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap -176 64 R0
SYMATTR InstName C2
SYMATTR Value 500µ
SYMBOL bv 352 16 R0
SYMATTR InstName B1
SYMATTR Value V=ddt(I(R1))
TEXT -448 368 Left 2 !.tran 0 {300+1m} 1m 1m