Version 4 SHEET 1 2212 1236 WIRE -128 -16 -192 -16 WIRE 128 -16 -128 -16 WIRE 304 -16 208 -16 WIRE 416 -16 304 -16 WIRE 512 -16 416 -16 WIRE -128 16 -128 -16 WIRE 304 16 304 -16 WIRE 416 16 416 -16 WIRE 832 48 560 48 WIRE 960 48 896 48 WIRE 1072 48 960 48 WIRE 1104 48 1072 48 WIRE 960 64 960 48 WIRE 560 80 560 48 WIRE 512 96 512 -16 WIRE 304 112 304 80 WIRE 304 112 -16 112 WIRE 416 112 416 96 WIRE 416 112 368 112 WIRE -128 128 -128 96 WIRE 304 128 304 112 WIRE 416 128 416 112 WIRE 960 160 960 144 WIRE 560 192 560 160 WIRE 128 224 -128 224 WIRE 304 224 304 192 WIRE 304 224 208 224 WIRE 416 224 416 208 WIRE 416 224 304 224 WIRE 512 224 512 144 WIRE 512 224 416 224 WIRE -128 256 -128 224 WIRE -192 272 -192 -16 WIRE -176 272 -192 272 WIRE -176 320 -192 320 WIRE -192 352 -192 320 WIRE -128 368 -128 336 WIRE -16 384 -16 112 WIRE 176 384 176 368 WIRE 576 384 560 384 WIRE 672 384 640 384 WIRE 176 480 176 464 WIRE 320 480 176 480 WIRE 352 480 320 480 WIRE 448 480 432 480 WIRE 464 480 448 480 WIRE 560 480 560 384 WIRE 560 480 544 480 WIRE 576 480 560 480 WIRE 672 480 672 384 WIRE 672 480 656 480 WIRE 688 480 672 480 WIRE 784 480 768 480 WIRE 800 480 784 480 WIRE 896 480 880 480 WIRE 912 480 896 480 WIRE 1072 480 1072 48 WIRE 1072 480 1056 480 WIRE 320 496 320 480 WIRE 176 528 176 480 WIRE 320 576 320 560 WIRE 320 576 240 576 WIRE 400 576 320 576 WIRE 560 576 560 480 WIRE 624 576 560 576 WIRE 784 576 784 480 WIRE 848 576 784 576 WIRE 400 592 400 576 WIRE 624 592 624 576 WIRE 848 592 848 576 WIRE 448 608 448 480 WIRE 672 608 672 480 WIRE 896 608 896 480 WIRE 928 656 896 656 WIRE 992 656 928 656 WIRE 1072 656 1072 480 WIRE 1072 656 1056 656 WIRE 176 688 176 624 WIRE 176 688 80 688 WIRE 448 688 448 656 WIRE 672 688 672 656 WIRE 928 688 928 656 WIRE 400 704 400 672 WIRE 624 704 624 672 WIRE 848 704 848 672 WIRE -16 720 -16 464 WIRE 176 720 176 688 WIRE 80 768 80 688 WIRE 80 768 48 768 WIRE 112 768 80 768 WIRE 928 784 928 768 WIRE 608 800 576 800 WIRE 608 832 608 800 WIRE -16 848 -16 816 WIRE 176 848 176 816 WIRE 608 944 608 912 WIRE -16 960 -16 928 WIRE 176 960 176 928 WIRE 176 960 -16 960 WIRE 208 960 176 960 FLAG -128 128 0 FLAG -128 368 0 FLAG -192 352 0 FLAG 560 192 0 FLAG 1104 48 Out IOPIN 1104 48 Out FLAG 848 704 0 FLAG 176 368 0 FLAG 608 944 0 FLAG 368 112 0 FLAG 928 784 0 FLAG 624 704 0 FLAG 672 688 0 FLAG 400 704 0 FLAG 448 688 0 FLAG 576 800 Vminus IOPIN 576 800 Out FLAG 208 960 Vminus IOPIN 208 960 In FLAG 960 160 0 SYMBOL voltage -128 0 R0 WINDOW 123 24 130 Left 0 WINDOW 39 0 0 Left 0 WINDOW 3 41 56 Left 0 SYMATTR Value2 AC 0 0 SYMATTR Value SINE(0 9.5 100 0 0 0 5) SYMATTR InstName V1 SYMBOL res 112 0 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 95K SYMBOL res 224 208 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R2 SYMATTR Value 95K SYMBOL res 400 0 R0 SYMATTR InstName R3 SYMATTR Value 5k SYMBOL res 400 112 R0 SYMATTR InstName R4 SYMATTR Value 5k SYMBOL diode 288 16 R0 SYMATTR InstName D1 SYMATTR Value 1N914 SYMBOL diode 288 192 M180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL e -128 240 R0 SYMATTR InstName E1 SYMATTR Value -1 SYMBOL e 560 64 R0 SYMATTR InstName E2 SYMATTR Value 40 SYMBOL diode 1056 464 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D3 SYMATTR Value 1N4148 SYMBOL diode 336 560 R180 WINDOW 0 36 58 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D4 SYMATTR Value 1N4148 SYMBOL res -32 832 R0 SYMATTR InstName R16 SYMATTR Value 100 SYMBOL res 160 832 R0 SYMATTR InstName R15 SYMATTR Value 100 SYMBOL res 160 368 R0 SYMATTR InstName R14 SYMATTR Value 100 SYMBOL e 848 576 M0 WINDOW 0 25 17 Left 0 SYMATTR InstName E3 SYMATTR Value -1E5 SYMBOL pnp 240 624 R180 SYMATTR InstName Q1 SYMATTR Value 2N4403 SYMBOL npn 112 720 R0 SYMATTR InstName Q2 SYMATTR Value 2N4401 SYMBOL npn 48 720 M0 SYMATTR InstName Q3 SYMATTR Value 2N4401 SYMBOL diode 992 672 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D5 SYMATTR Value 1N4148 SYMBOL voltage 608 928 R180 WINDOW 0 31 90 Left 0 WINDOW 3 24 16 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 15 SYMBOL res -32 368 R0 SYMATTR InstName R17 SYMATTR Value 1k SYMBOL e 624 576 M0 WINDOW 0 24 15 Left 0 SYMATTR InstName E4 SYMATTR Value -1E5 SYMBOL res 1008 464 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL res 784 496 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R9 SYMATTR Value 10K SYMBOL res 336 496 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R13 SYMATTR Value 10k SYMBOL res 560 496 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R11 SYMATTR Value 100k SYMBOL res 912 672 R0 SYMATTR InstName R8 SYMATTR Value 10k SYMBOL res 672 496 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL cap 576 400 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C2 SYMATTR Value 6.8µ SYMBOL e 400 576 M0 SYMATTR InstName E5 SYMATTR Value -1E5 SYMBOL res 448 496 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R12 SYMATTR Value 10k SYMBOL cap 832 64 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL res 944 48 R0 SYMATTR InstName R5 SYMATTR Value 10k TEXT -112 -40 Left 0 !.tran 0 50m 0