Version 4
SHEET 1 880 680
WIRE -32 -96 -224 -96
WIRE 112 -96 -32 -96
WIRE 272 -96 192 -96
WIRE 304 -96 272 -96
WIRE -224 -64 -224 -96
WIRE -32 -16 -32 -96
WIRE -224 48 -224 16
WIRE 272 112 272 -96
WIRE -192 160 -304 160
WIRE -112 160 -192 160
WIRE -32 160 -32 64
WIRE -32 160 -48 160
WIRE 16 160 -32 160
WIRE 112 160 80 160
WIRE 192 160 176 160
WIRE 208 160 192 160
WIRE -448 208 -576 208
WIRE -576 224 -576 208
WIRE 192 240 192 160
WIRE -576 336 -576 304
WIRE -304 336 -304 256
WIRE -304 336 -576 336
WIRE 192 336 192 320
WIRE 272 336 272 208
WIRE -304 352 -304 336
FLAG 192 336 0
FLAG -224 48 0
FLAG 272 336 0
FLAG 304 -96 OUT
IOPIN 304 -96 Out
FLAG -304 352 0
FLAG -192 160 Vin
SYMBOL npn 208 112 R0
SYMATTR InstName Q1
SYMBOL diode 112 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMBOL diode 16 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMBOL res 176 224 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage -224 -80 R0
SYMATTR InstName V1
SYMATTR Value 40
SYMBOL res 208 -112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL npn -368 160 R0
SYMATTR InstName Q2
SYMBOL res -352 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 4.7k
SYMBOL voltage -576 208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 15 0.5 1n 1n 1 2 1)
SYMBOL diode -48 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMBOL res -48 -32 R0
SYMATTR InstName R4
SYMATTR Value 33k
TEXT -384 464 Left 2 !.tran 4
TEXT -496 104 Left 2 ;Externe Schaltung
LINE Normal -256 400 -464 400 2
LINE Normal -304 80 -240 80 2
LINE Normal -528 80 -304 80 2
LINE Normal -240 400 -240 80 2
LINE Normal -256 400 -240 400 2
LINE Normal -640 400 -464 400 2
LINE Normal -640 80 -640 400 2
LINE Normal -528 80 -640 80 2