Version 4
SHEET 1 880 680
WIRE -1184 -1440 -1184 -1536
WIRE -416 -1440 -1184 -1440
WIRE -1904 -1360 -2000 -1360
WIRE -1440 -1360 -1824 -1360
WIRE -1296 -1360 -1440 -1360
WIRE -2000 -1216 -2000 -1360
WIRE -1184 -1200 -1184 -1440
WIRE -416 -1168 -416 -1440
WIRE -1296 -1152 -1296 -1360
WIRE -1248 -1152 -1296 -1152
WIRE -480 -1120 -608 -1120
WIRE -1184 -944 -1184 -1104
WIRE -416 -944 -416 -1072
WIRE -416 -944 -1184 -944
WIRE -1440 -848 -1440 -1360
WIRE -848 -848 -1440 -848
WIRE -912 -800 -1248 -800
WIRE -2000 -768 -2000 -1136
WIRE -720 -752 -848 -752
WIRE -608 -752 -608 -1120
WIRE -608 -752 -640 -752
WIRE -1184 -672 -1184 -944
WIRE -1328 -624 -1424 -624
WIRE -1248 -624 -1248 -800
WIRE -1424 -480 -1424 -624
WIRE -1184 -400 -1184 -576
WIRE -1424 -32 -1424 -400
WIRE -1184 -32 -1184 -320
FLAG -1184 -32 0
FLAG -2000 -768 0
FLAG -1424 -32 0
FLAG -1184 -1696 0
SYMBOL voltage -2000 -1232 R0
WINDOW 0 24 96 Left 2
WINDOW 3 24 124 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 0
SYMBOL voltage -1184 -1600 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 124 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 1n 1n 1ms 2ms)
SYMBOL res -1808 -1376 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL voltage -1424 -496 R0
WINDOW 0 24 96 Left 2
WINDOW 3 24 124 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 1
SYMBOL res -1232 -640 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL res -1200 -416 R0
SYMATTR InstName R3
SYMATTR Value 1
SYMBOL npn3 -1248 -1200 R0
SYMATTR InstName Q1
SYMBOL npn3 -1248 -672 R0
SYMATTR InstName Q2
SYMBOL res -1200 -1632 R0
SYMATTR InstName R4
SYMATTR Value 1
SYMBOL npn3 -480 -1168 R0
SYMATTR InstName Q3
SYMBOL npn3 -912 -848 R0
SYMATTR InstName Q4
SYMBOL res -624 -768 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 100
TEXT -2048 -744 Left 2 !.tran 0 10ms 0 1ms
TEXT -1472 -8 Left 2 !;tran 0 10ms 0 1ms