Version 4
SHEET 1 4432 680
WIRE 1664 -304 1440 -304
WIRE 1728 -304 1664 -304
WIRE 1120 -256 832 -256
WIRE 1280 -256 1120 -256
WIRE 1728 -256 1728 -304
WIRE 1440 -224 1440 -304
WIRE 1280 -208 1280 -256
WIRE 832 -192 832 -256
WIRE 1120 -192 1120 -256
WIRE 1664 -160 1664 -304
WIRE 1440 -80 1440 -144
WIRE 1504 -80 1440 -80
WIRE 1552 -80 1504 -80
WIRE 1120 -48 1120 -112
WIRE 1168 -48 1120 -48
WIRE 1232 -48 1168 -48
WIRE 1552 -32 1552 -80
WIRE 1232 0 1232 -48
WIRE 1440 48 1440 -80
WIRE 1440 48 1408 48
WIRE 832 80 832 -112
WIRE 832 80 800 80
WIRE 1120 80 1120 -48
WIRE 1120 80 1088 80
WIRE 1344 96 1264 96
WIRE 1664 112 1664 -80
WIRE 1664 112 1632 112
WIRE 736 128 656 128
WIRE 1024 128 944 128
WIRE 1440 144 1408 144
WIRE 832 176 800 176
WIRE 1120 176 1088 176
WIRE 1264 176 1264 96
WIRE 1664 208 1632 208
WIRE 1440 256 1440 144
WIRE 1440 256 1264 256
WIRE 1440 288 1440 256
WIRE 832 320 832 176
WIRE 1120 320 1120 176
WIRE 1440 384 1440 368
FLAG 1440 384 0
FLAG 1728 -176 0
FLAG 1552 32 0
FLAG 1232 64 0
FLAG 1280 -128 0
FLAG 1120 320 0
FLAG 1664 208 0
FLAG 832 320 0
FLAG 1504 -80 A
FLAG 1168 -48 B
SYMBOL res 1248 160 R0
SYMATTR InstName R1
SYMATTR Value 3k
SYMBOL res 1424 -240 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL voltage 1728 -272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 300
SYMBOL cap 1536 -32 R0
SYMATTR InstName C1
SYMATTR Value 510p
SYMBOL res 1424 272 R0
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL res 1104 -208 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap 1216 0 R0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL voltage 1280 -224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res 1648 -176 R0
SYMATTR InstName R4
SYMATTR Value 100k
SYMBOL res 816 -208 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL KT315G_Avalanche 1376 96 R0
SYMATTR InstName X1
SYMBOL KT315G_Avalanche 1600 160 R0
SYMATTR InstName X2
SYMBOL KT315G_Avalanche 1056 128 M180
SYMATTR InstName X3
SYMBOL KT315G_Avalanche 768 128 M180
SYMATTR InstName X4
TEXT 1248 296 Left 2 !.tran 0.25m uic