Version 4 SHEET 1 880 804 WIRE -48 480 -48 512 WIRE -48 512 -144 512 WIRE -144 512 -144 432 WIRE -144 352 -144 288 WIRE -144 288 -48 288 WIRE -48 288 -48 320 WIRE -48 384 -48 400 WIRE 128 320 128 304 WIRE 208 320 208 304 WIRE 208 304 128 304 WIRE 128 304 128 272 WIRE 128 400 128 416 WIRE 128 416 208 416 WIRE 208 416 208 384 WIRE -48 400 48 400 WIRE -48 400 -48 416 WIRE 48 400 48 416 WIRE 48 416 128 416 WIRE -48 288 -48 224 WIRE -48 224 64 224 WIRE -48 224 -48 192 WIRE -48 112 -48 80 WIRE -48 80 128 80 WIRE 128 80 128 176 WIRE 336 128 336 80 WIRE 336 80 256 80 WIRE 336 240 336 208 WIRE 256 128 256 80 WIRE 256 80 128 80 WIRE 256 192 256 512 WIRE 256 512 -48 512 WIRE 128 448 128 416 WIRE -480 80 -320 80 WIRE -480 240 -480 208 WIRE -480 112 -480 80 WIRE -480 368 -480 352 WIRE -320 112 -320 80 WIRE -320 80 -48 80 WIRE -320 192 -320 288 WIRE -320 288 -416 288 WIRE -320 368 -320 288 WIRE -320 480 -320 448 WIRE -480 480 -480 448 WIRE -480 352 -576 352 WIRE -480 352 -480 336 WIRE -576 352 -576 368 WIRE -576 448 -576 480 WIRE -576 576 -576 544 WIRE -480 208 -560 208 WIRE -480 208 -480 192 WIRE -208 288 -224 288 WIRE -304 288 -320 288 FLAG 336 240 0 FLAG 128 448 0 FLAG -320 480 0 FLAG -480 480 0 FLAG -576 576 0 FLAG -560 208 Vout IOPIN -560 208 Out SYMBOL npn 64 176 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL ind -160 336 R0 SYMATTR InstName L1 SYMATTR Value 100µ SYMBOL cap -64 320 R0 SYMATTR InstName C1 SYMATTR Value 220p SYMBOL cap -64 416 R0 SYMATTR InstName C2 SYMATTR Value 220p SYMBOL res 112 304 R0 SYMATTR InstName R1 SYMATTR Value 500 SYMBOL cap 192 320 R0 SYMATTR InstName C3 SYMATTR Value .01µ SYMBOL res -64 96 R0 SYMATTR InstName R2 SYMATTR Value 20k SYMBOL voltage 336 112 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 10 SYMBOL cap 240 128 R0 SYMATTR InstName C4 SYMATTR Value 1µ SYMBOL cap -144 272 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C5 SYMATTR Value 100p SYMBOL npn -416 240 M0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res -496 96 R0 SYMATTR InstName R6 SYMATTR Value 5k SYMBOL res -496 352 R0 SYMATTR InstName R3 SYMATTR Value 3k SYMBOL res -336 96 R0 SYMATTR InstName R4 SYMATTR Value 200k SYMBOL res -336 352 R0 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL cap -592 480 R0 SYMATTR InstName C6 SYMATTR Value .01µ SYMBOL res -592 352 R0 SYMATTR InstName R7 SYMATTR Value 700 SYMBOL res -208 272 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 40k TEXT 8 576 Left 0 !.tran 0 .5m 0 1n