Version 4
SHEET 1 1480 724
WIRE -80 -112 -304 -112
WIRE 288 -112 0 -112
WIRE -304 -64 -304 -112
WIRE -304 48 -304 16
WIRE 288 96 288 -112
WIRE -80 160 -304 160
WIRE 240 160 0 160
WIRE -304 192 -304 160
WIRE -304 304 -304 272
WIRE 288 304 288 160
FLAG -304 48 0
FLAG -304 304 0
FLAG 288 304 0
SYMBOL res -96 -96 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 1000
SYMBOL voltage -304 -80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 50 50)
SYMBOL voltage -304 176 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 10 5m 0.1u 0.1u 1m 10m)
SYMBOL res -96 176 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R2
SYMATTR Value 40k
SYMBOL Misc\\SCR 272 96 R0
WINDOW 38 44 28 Left 0
SYMATTR InstName U1
TEXT -320 -160 Left 0 !.tran .1 startup