Version 4
SHEET 1 1004 680
WIRE 16 -144 -16 -144
WIRE 128 -144 96 -144
WIRE 208 -80 208 -144
WIRE -16 -48 -16 -144
WIRE 192 -48 -16 -48
WIRE 192 -32 192 -48
WIRE 192 -32 176 -32
WIRE 208 -32 192 -32
WIRE 304 -32 272 -32
WIRE 176 64 176 -32
WIRE 176 64 48 64
WIRE 304 64 304 -32
WIRE 480 64 304 64
WIRE 608 64 480 64
WIRE 176 128 176 64
WIRE 208 128 176 128
WIRE 304 128 304 64
WIRE 304 128 272 128
WIRE 288 176 272 176
WIRE 400 176 368 176
WIRE 480 176 480 64
WIRE 608 176 608 64
WIRE 48 192 48 64
WIRE 48 320 48 272
WIRE 608 320 608 256
WIRE 608 320 48 320
WIRE 48 336 48 320
FLAG 48 336 0
SYMBOL voltage 48 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 50 60)
SYMBOL res 592 160 R0
SYMATTR InstName R1
SYMATTR Value 25
SYMBOL voltage 384 176 R270
WINDOW 3 -85 173 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 5 0.002 10n 10n 1m 16.67m 10)
SYMATTR InstName V2
SYMBOL res 384 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL Misc\\SCR 208 144 R270
SYMATTR InstName U1
SYMATTR SpiceModel SCR
SYMBOL res 224 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL voltage 112 -144 R90
WINDOW 3 -61 311 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 5 0.0102 10n 10n 1m 16.67m 10)
SYMATTR InstName V3
SYMBOL Misc\\SCR 272 -48 R90
SYMATTR InstName U2
SYMATTR SpiceModel SCR
TEXT 392 -96 Left 2 !.inc SCR.sub
TEXT 16 368 Left 2 !.tran 60m