Version 4
SHEET 1 880 680
WIRE -80 32 -272 32
WIRE 48 32 -80 32
WIRE 240 32 48 32
WIRE 336 32 240 32
WIRE 528 32 336 32
WIRE 560 32 528 32
WIRE 656 32 640 32
WIRE 240 48 240 32
WIRE 336 48 336 32
WIRE -80 80 -80 32
WIRE -272 128 -272 32
WIRE 368 128 336 128
WIRE 48 144 48 32
WIRE 240 144 240 128
WIRE 336 144 336 128
WIRE 528 144 528 32
WIRE 656 160 656 32
WIRE -176 192 -224 192
WIRE -80 192 -80 160
WIRE -80 192 -112 192
WIRE -16 192 -80 192
WIRE 176 192 128 192
WIRE 448 192 400 192
WIRE 624 192 592 192
WIRE -224 240 -224 192
WIRE 48 256 48 240
WIRE 128 256 128 192
WIRE 128 256 48 256
WIRE 240 256 240 240
WIRE 288 256 240 256
WIRE 336 256 336 240
WIRE 336 256 288 256
WIRE 448 256 448 192
WIRE 528 256 528 240
WIRE 528 256 448 256
WIRE -80 272 -80 192
WIRE 48 272 48 256
WIRE 288 272 288 256
WIRE 528 272 528 256
WIRE -272 336 -272 208
WIRE -256 336 -272 336
WIRE -256 352 -256 336
WIRE -272 368 -272 336
WIRE -224 368 -224 320
WIRE -224 368 -272 368
WIRE -80 368 -80 352
WIRE -80 368 -224 368
WIRE 48 368 48 352
WIRE 48 368 -80 368
WIRE 288 368 288 352
WIRE 288 368 48 368
WIRE 528 368 528 352
WIRE 528 368 288 368
WIRE 560 368 528 368
WIRE 656 368 656 224
WIRE 656 368 640 368
FLAG -256 352 0
FLAG 368 128 Out
IOPIN 368 128 Out
SYMBOL npn2 176 144 R0
WINDOW 0 -7 9 Left 0
WINDOW 3 22 49 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn2 -16 144 R0
SYMATTR InstName Q2
SYMATTR Value 2N2222
SYMBOL res 32 256 R0
WINDOW 0 -28 25 Left 0
WINDOW 3 -43 58 Left 0
SYMATTR InstName R1
SYMATTR Value 560
SYMBOL res -96 256 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res -96 64 R0
SYMATTR InstName R3
SYMATTR Value 2k7
SYMBOL voltage -272 112 R0
WINDOW 0 13 13 Left 0
WINDOW 3 -15 61 Left 0
SYMATTR InstName Vcc
SYMATTR Value 12
SYMBOL res 272 256 R0
WINDOW 0 -29 27 Left 0
WINDOW 3 -32 62 Left 0
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL npn2 400 144 M0
WINDOW 0 -4 10 Left 0
WINDOW 3 20 49 Left 0
SYMATTR InstName Q3
SYMATTR Value 2N2222
SYMBOL npn2 592 144 M0
SYMATTR InstName Q4
SYMATTR Value 2N2222
SYMBOL res 512 256 R0
WINDOW 0 -28 25 Left 0
WINDOW 3 -43 58 Left 0
SYMATTR InstName R5
SYMATTR Value 560
SYMBOL res 656 352 R90
WINDOW 0 16 105 VBottom 0
WINDOW 3 -10 20 VTop 0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 656 16 R90
WINDOW 0 57 104 VBottom 0
WINDOW 3 32 24 VTop 0
SYMATTR InstName R7
SYMATTR Value 2k7
SYMBOL res 320 32 R0
WINDOW 0 -29 27 Left 0
WINDOW 3 -32 62 Left 0
SYMATTR InstName R8
SYMATTR Value 100
SYMBOL res 224 32 R0
WINDOW 0 -32 38 Left 0
WINDOW 3 -48 62 Left 0
SYMATTR InstName R9
SYMATTR Value 100
SYMBOL voltage -224 224 R0
WINDOW 0 13 13 Left 0
WINDOW 3 3 128 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vsin
SYMATTR Value SINE(0 1 1k)
SYMBOL cap -112 176 R90
WINDOW 0 14 56 VBottom 0
WINDOW 3 -11 4 VTop 0
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL Robertugo\\Pote 640 128 R0
WINDOW 0 -18 -6 Left 0
WINDOW 3 -63 20 Left 0
WINDOW 123 -26 101 Center 0
SYMATTR InstName U1
SYMATTR Value Rt=2k5
SYMATTR Value2 Set=.8
TEXT -306 390 Left 0 !.tran 10m