Version 4
SHEET 1 1256 680
WIRE 960 -384 720 -384
WIRE 720 -352 720 -384
WIRE 496 -240 336 -240
WIRE 624 -240 496 -240
WIRE 720 -240 720 -272
WIRE 720 -240 624 -240
WIRE 768 -240 720 -240
WIRE 816 -240 768 -240
WIRE 960 -240 960 -384
WIRE 960 -240 896 -240
WIRE 336 -208 336 -240
WIRE 496 -144 496 -240
WIRE 720 -144 720 -240
WIRE 624 -128 624 -240
WIRE 336 -96 336 -128
WIRE 432 -96 336 -96
WIRE 336 -64 336 -96
WIRE 720 0 720 -64
WIRE 960 0 960 -240
WIRE 336 48 336 16
WIRE 384 48 336 48
WIRE 496 48 496 -48
WIRE 496 48 448 48
WIRE 624 48 624 -64
WIRE 624 48 496 48
WIRE 656 48 624 48
WIRE 336 96 336 48
WIRE 496 112 496 48
WIRE -16 144 -48 144
WIRE 16 144 -16 144
WIRE 128 144 96 144
WIRE 224 144 128 144
WIRE 272 144 224 144
WIRE -48 176 -48 144
WIRE 128 176 128 144
WIRE 224 192 224 144
WIRE -48 288 -48 256
WIRE 128 288 128 256
WIRE 128 288 -48 288
WIRE 224 288 224 256
WIRE 224 288 128 288
WIRE 336 288 336 192
WIRE 336 288 224 288
WIRE 496 288 496 192
WIRE 496 288 336 288
WIRE 720 288 720 96
WIRE 720 288 496 288
WIRE 960 288 960 80
WIRE 960 288 720 288
WIRE 128 320 128 288
FLAG 128 320 0
FLAG -16 144 in
FLAG 960 -240 +Ub
FLAG 768 -240 Uout
SYMBOL res 112 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 82k
SYMBOL res 112 160 R0
SYMATTR InstName R2
SYMATTR Value 15k
SYMBOL cap 208 192 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL npn 272 96 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL voltage -48 160 R0
WINDOW 3 -209 152 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 0 100n 100n 50m 100m)
SYMATTR InstName V1
SYMBOL res 320 -224 R0
SYMATTR InstName R3
SYMATTR Value 4k7
SYMBOL res 320 -80 R0
SYMATTR InstName R4
SYMATTR Value 100R
SYMBOL res 480 96 R0
SYMATTR InstName R5
SYMATTR Value 100R
SYMBOL pnp 432 -48 M180
WINDOW 0 47 28 Left 2
WINDOW 3 52 56 Left 2
SYMATTR InstName Q2
SYMATTR Value BC327-25
SYMBOL npn 656 0 R0
SYMATTR InstName Q3
SYMATTR Value BD243A
SYMBOL res 704 -160 R0
SYMATTR InstName R6
SYMATTR Value 0R22
SYMBOL res 704 -368 R0
SYMATTR InstName R7
SYMATTR Value 21k
SYMBOL voltage 960 -16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 24V
SYMBOL diode 640 -64 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap 448 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL res 912 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R_load
SYMATTR Value 10R
TEXT 184 320 Left 2 !.tran 1s