Version 4
SHEET 1 880 680
WIRE 368 -48 -80 -48
WIRE 368 -32 368 -48
WIRE 160 16 64 16
WIRE 240 16 160 16
WIRE 240 32 240 16
WIRE 368 64 368 48
WIRE 496 64 368 64
WIRE 368 96 368 64
WIRE -80 112 -80 -48
WIRE 64 112 64 16
WIRE 160 128 160 16
WIRE 240 144 240 112
WIRE 304 144 240 144
WIRE 240 160 240 144
WIRE -80 272 -80 192
WIRE 64 272 64 192
WIRE 160 272 160 192
WIRE 240 272 240 240
WIRE 368 272 368 192
FLAG 240 272 0
FLAG 368 272 0
FLAG 64 272 0
FLAG -80 272 0
FLAG 160 272 0
SYMBOL res 224 16 R0
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL res 224 144 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL current 64 192 R180
WINDOW 0 24 80 Left 2
WINDOW 3 24 0 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(0 10u 1n 1n 1n 100u 200u)
SYMBOL npn 304 96 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL voltage -80 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 352 -48 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap 144 128 R0
SYMATTR InstName C1
SYMATTR Value 220p
TEXT -114 296 Left 2 !.tran 100m