Version 4
SHEET 1 880 680
WIRE 448 -144 256 -144
WIRE 544 -144 448 -144
WIRE 448 -128 448 -144
WIRE 256 -64 256 -144
WIRE 256 -64 192 -64
WIRE 320 -64 256 -64
WIRE 448 -32 448 -64
WIRE 192 0 192 -64
WIRE 320 0 320 -64
WIRE 320 176 320 80
WIRE -272 256 -400 256
WIRE -144 256 -192 256
WIRE 192 256 192 80
WIRE 192 256 48 256
WIRE 272 256 192 256
WIRE 544 272 544 -144
WIRE 192 304 192 256
WIRE 112 320 48 320
WIRE -400 352 -400 336
WIRE -144 352 -400 352
WIRE 112 416 112 320
WIRE 192 416 192 368
WIRE 192 416 112 416
WIRE 320 416 320 272
WIRE 320 416 192 416
WIRE 544 416 544 352
WIRE 544 416 320 416
WIRE -400 480 -400 352
WIRE 320 496 320 416
FLAG 320 496 0
FLAG -400 480 0
FLAG 448 -32 0
SYMBOL res 176 -16 R0
SYMATTR InstName R1
SYMATTR Value 87k
SYMATTR SpiceLine tol=1
SYMBOL voltage 544 256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=5
SYMATTR InstName V1
SYMATTR Value SINE(225 225 0.5 0)
SYMBOL zener 208 368 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BZX84C12L
SYMBOL nmos 272 176 R0
SYMATTR InstName M1
SYMATTR Value SPA11N60C3
SYMBOL voltage -400 240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0.01
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 1 0.0005 0.0005 0.2 2)
SYMBOL res -176 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 212R
SYMBOL Optos\\4N28 -48 320 R0
SYMATTR InstName U2
SYMBOL res 304 -16 R0
SYMATTR InstName R2
SYMATTR Value 990R
SYMATTR SpiceLine tol=1
SYMBOL cap 432 -128 R0
SYMATTR InstName C1
SYMATTR Value 1.8mC
TEXT -432 520 Left 2 !.tran 0 10 0 0.0005
TEXT 336 104 Left 2 ;Discharge-\nwiderstand
TEXT 64 88 Left 2 ;Steuer-\nwiderstand