Version 4 SHEET 1 6484 680 WIRE 192 -128 192 -192 WIRE 192 64 192 -48 WIRE 288 64 192 64 WIRE 464 64 352 64 WIRE 192 160 192 64 WIRE 288 160 192 160 WIRE 464 160 352 160 WIRE 192 272 192 160 WIRE -608 320 -672 320 WIRE -48 320 -528 320 WIRE 128 320 32 320 WIRE 192 416 192 368 WIRE 336 416 192 416 WIRE 192 480 192 416 WIRE 192 624 192 560 FLAG 192 624 0 FLAG 192 -192 0 FLAG 464 64 0 FLAG -672 320 0 FLAG 336 416 OUT FLAG 464 160 0 SYMBOL npn 128 272 R0 SYMATTR InstName Q1 SYMATTR Value BC547C SYMBOL res 48 304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL res 208 576 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R3 SYMATTR Value 600 SYMBOL voltage 192 -32 R180 WINDOW 0 24 96 Left 2 WINDOW 3 24 16 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 24 68 Left 2 SYMATTR InstName V5 SYMATTR Value 3V SYMATTR SpiceLine Rser=10m SYMBOL cap 352 48 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 100nF SYMATTR SpiceLine Rser=20m SYMBOL voltage -512 320 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 60 56 VTop 2 SYMATTR InstName V6 SYMATTR Value PULSE(-5V 15V 0 3n 3n 14ns 28ns 100) SYMATTR SpiceLine Rser=10m SYMBOL cap 352 144 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 10µF SYMATTR SpiceLine Rser=20m TEXT -520 616 Left 2 !.tran 2µs