Version 4
SHEET 1 1020 680
WIRE 16 32 -176 32
WIRE 256 32 16 32
WIRE 256 64 256 32
WIRE 176 80 144 80
WIRE 176 112 176 80
WIRE 192 112 176 112
WIRE -176 128 -176 32
WIRE -96 128 -112 128
WIRE -64 128 -96 128
WIRE 16 128 16 112
WIRE 64 128 16 128
WIRE 80 128 64 128
WIRE 256 176 256 160
WIRE 256 176 144 176
WIRE 288 176 256 176
WIRE 320 176 288 176
WIRE 480 176 400 176
WIRE 144 192 144 176
WIRE 256 192 256 176
WIRE 480 192 480 176
WIRE -112 224 -112 128
WIRE -64 224 -112 224
WIRE 64 224 16 224
WIRE -112 240 -112 224
WIRE 16 240 16 224
WIRE 64 240 64 224
WIRE 80 240 64 240
WIRE 192 240 176 240
WIRE 176 288 176 240
WIRE 176 288 144 288
WIRE -176 320 -176 208
WIRE -112 320 -176 320
WIRE 16 320 -112 320
WIRE 256 320 256 288
WIRE 256 320 16 320
WIRE 480 320 480 272
WIRE 480 320 256 320
FLAG -176 320 0
FLAG 288 176 out
FLAG -96 128 in
FLAG 64 128 b1
FLAG 64 224 b2
SYMBOL res 0 16 R0
SYMATTR InstName R1
SYMATTR Value 500
SYMBOL res 0 224 R0
SYMATTR InstName R2
SYMATTR Value 500
SYMBOL voltage -176 112 R0
WINDOW 3 -5 56 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 480 176 R0
WINDOW 3 -201 -119 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 100u 40n 40n 100m 200m 20)
SYMBOL res 304 192 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 2
SYMBOL voltage -112 224 R0
WINDOW 3 86 158 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 100u 40n 40n 5m 10m 200)
SYMBOL res 32 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 750
SYMBOL res 32 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 750
SYMBOL npn 192 192 R0
SYMATTR InstName Q1
SYMATTR Value 2N4401
SYMBOL pnp 192 160 M180
SYMATTR InstName Q2
SYMATTR Value 2N4403
SYMBOL pnp 80 176 M180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL npn 80 192 R0
SYMATTR InstName Q4
SYMATTR Value 2N3904
TEXT -98 344 Left 2 !.tran 500m startup