Version 4 SHEET 1 1248 692 WIRE 176 144 80 144 WIRE 368 144 176 144 WIRE 624 144 368 144 WIRE 768 144 624 144 WIRE 1008 144 768 144 WIRE 1168 144 1008 144 WIRE 80 160 80 144 WIRE 80 160 -16 160 WIRE 624 176 624 144 WIRE 768 176 768 144 WIRE 560 224 432 224 WIRE 1008 240 1008 144 WIRE 1168 240 1168 144 WIRE 368 272 368 144 WIRE 656 272 624 272 WIRE 656 304 656 272 WIRE 1008 368 1008 320 WIRE 656 400 656 384 WIRE 656 400 576 400 WIRE 80 416 80 160 WIRE 176 416 176 144 WIRE 432 416 432 320 WIRE 656 416 656 400 WIRE 1168 416 1168 320 WIRE 1168 416 1072 416 WIRE 576 448 576 400 WIRE 1168 448 1168 416 WIRE 656 512 656 496 WIRE 768 512 768 256 WIRE 768 512 656 512 WIRE 80 624 80 480 WIRE 176 624 176 496 WIRE 176 624 80 624 WIRE 432 624 432 496 WIRE 432 624 176 624 WIRE 576 624 576 512 WIRE 576 624 432 624 WIRE 656 624 656 592 WIRE 656 624 576 624 WIRE 1008 624 1008 464 WIRE 1008 624 656 624 WIRE 1168 624 1168 512 WIRE 1168 624 1008 624 WIRE 176 672 176 624 FLAG 176 672 0 FLAG -16 160 inside_cell IOPIN -16 160 Out SYMBOL npn 1072 368 M0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL npn 368 224 R0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL pnp2 560 176 R0 SYMATTR InstName Q3 SYMATTR Value 2N3906 SYMBOL cap 1152 448 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMATTR SpiceLine V=10 Irms=0 Rser=0.009 Lser=0 mfg="TDK" pn="C1608X5RIA105K" type="X5R" SYMBOL polcap 64 416 R0 WINDOW 3 24 64 Left 0 SYMATTR Value 0.47µ SYMATTR InstName C2 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=50 Irms=22m Rser=3.9 Lser=0 mfg="Nichicon" pn="UPL1HR47MAH" type="Al electrolytic" SYMBOL res 160 400 R0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL res 416 400 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 640 288 R0 SYMATTR InstName R3 SYMATTR Value 100 SYMBOL voltage 656 496 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res 752 160 R0 SYMATTR InstName R4 SYMATTR Value 500k SYMBOL res 1152 224 R0 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL res 992 224 R0 SYMATTR InstName R6 SYMATTR Value 600 SYMBOL res 640 400 R0 SYMATTR InstName R7 SYMATTR Value 5k SYMBOL cap 560 448 R0 WINDOW 3 -51 67 Left 0 SYMATTR InstName C3 SYMATTR Value 0.47µf TEXT 176 616 Left 0 !.tran 0 0.15 0 .0001 TEXT 384 112 Left 0 ;Sodium Current: activate/inactivate TEXT 984 112 Left 0 ;Potassium Current TEXT 24 112 Left 0 ;Passive membrane RC