Version 4
SHEET 1 2428 752
WIRE 288 0 240 0
WIRE 416 0 368 0
WIRE 240 32 240 0
WIRE 240 48 240 32
WIRE 0 96 -144 96
WIRE 176 96 80 96
WIRE 416 96 416 0
WIRE -144 144 -144 96
WIRE -144 272 -144 224
WIRE 240 272 240 144
WIRE 416 272 416 176
FLAG 240 272 0
FLAG 416 272 0
FLAG -144 272 0
FLAG 240 32 CE
SYMBOL res -16 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R
SYMATTR Value 5k
SYMBOL voltage 416 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 -12 Left 2
SYMATTR Value 20V
SYMATTR InstName V
SYMBOL voltage -144 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName Vs
SYMATTR Value PULSE(0 5 0 1n 1n 0.009m 1m)
SYMBOL ind 384 16 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L
SYMATTR Value 0.1H
SYMATTR SpiceLine Cpar=1n
SYMBOL npn 176 48 R0
SYMATTR InstName Q
SYMATTR Value 2N3055
TEXT -152 312 Left 2 !.tran 0 50m 0 0.1m