Version 4 SHEET 1 1212 1108 WIRE -128 -80 -368 -80 WIRE 176 -80 -128 -80 WIRE 1104 -80 176 -80 WIRE -368 -32 -368 -80 WIRE 1104 -32 1104 -80 WIRE -128 -16 -128 -80 WIRE 1104 80 1104 48 WIRE -368 112 -368 48 WIRE 0 112 -368 112 WIRE 432 112 0 112 WIRE -368 144 -368 112 WIRE 176 160 176 -80 WIRE -128 208 -128 64 WIRE -112 208 -128 208 WIRE 0 208 0 176 WIRE 0 208 -32 208 WIRE 112 208 0 208 WIRE -368 240 -368 208 WIRE 432 256 432 112 WIRE -128 304 -128 208 WIRE -128 304 -224 304 WIRE 368 304 -128 304 WIRE 176 400 176 256 WIRE 432 400 432 352 WIRE 432 400 176 400 WIRE -224 448 -224 304 WIRE -128 464 -128 304 WIRE 432 480 432 400 WIRE -224 576 -224 512 WIRE -128 576 -128 544 WIRE 432 592 432 560 FLAG -128 576 0 FLAG 1104 80 0 FLAG -368 240 0 FLAG 432 592 0 FLAG -224 576 0 SYMBOL npn 112 160 R0 SYMATTR InstName Q1 SYMATTR Value BFW92 SYMBOL npn 368 256 R0 SYMATTR InstName Q2 SYMATTR Value BFW92 SYMBOL res -144 -32 R0 SYMATTR InstName R1 SYMATTR Value 6.8k SYMBOL res -144 448 R0 SYMATTR InstName R2 SYMATTR Value 2400 SYMBOL res -16 192 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL cap -384 144 R0 SYMATTR InstName C1 SYMATTR Value 200p SYMBOL ind -384 -48 R0 SYMATTR InstName L1 SYMATTR Value 1µ SYMBOL cap -16 112 R0 WINDOW 0 42 18 Left 2 WINDOW 3 29 -19 Left 2 SYMATTR InstName C2 SYMATTR Value 100p SYMBOL voltage 1104 -48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 12V SYMBOL res 416 464 R0 SYMATTR InstName R9 SYMATTR Value 1k SYMBOL cap -240 448 R0 SYMATTR InstName C3 SYMATTR Value 10n TEXT -384 664 Left 2 !.tran 200u