Version 4 SHEET 1 1144 800 WIRE 560 -48 400 -48 WIRE 736 -48 640 -48 WIRE 544 96 544 80 WIRE 640 96 544 96 WIRE 640 112 640 96 WIRE -368 144 -368 112 WIRE 544 176 544 96 WIRE 400 192 400 -48 WIRE 512 192 400 192 WIRE 640 208 640 192 WIRE 640 208 576 208 WIRE 736 208 736 -48 WIRE 736 208 640 208 WIRE 784 208 736 208 WIRE 512 224 464 224 WIRE 400 240 400 192 WIRE -368 256 -368 224 WIRE 544 272 544 240 WIRE -224 288 -224 272 WIRE 464 400 464 224 WIRE 544 400 464 400 WIRE 736 400 736 208 WIRE 736 400 624 400 WIRE 464 416 464 400 WIRE 400 512 400 304 WIRE 464 512 464 496 WIRE 464 512 400 512 WIRE 464 528 464 512 FLAG -368 256 0 FLAG -368 112 +15V FLAG 544 80 +15V FLAG 784 208 out FLAG -224 368 0 FLAG -224 272 -15V FLAG 544 272 -15V FLAG 464 528 0 SYMBOL voltage -368 128 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL res 624 96 R0 WINDOW 0 36 40 Invisible 0 SYMATTR InstName R1 SYMATTR Value 4.7K SYMBOL Comparators\\LTC1841 544 208 R0 WINDOW 0 16 -32 Invisible 0 SYMATTR InstName U1 SYMBOL voltage -224 272 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V5 SYMATTR Value -15 SYMBOL res 448 400 R0 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL res 640 384 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 100K SYMBOL res 656 -64 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R4 SYMATTR Value 100K SYMBOL cap 384 240 R0 SYMATTR InstName C1 SYMATTR Value .01µF TEXT 608 360 Left 0 !.tran 1m