Version 4 SHEET 1 880 1108 WIRE -112 128 -144 128 WIRE 0 128 -16 128 WIRE 112 128 80 128 WIRE 176 128 112 128 WIRE 304 128 256 128 WIRE 112 224 112 128 WIRE 128 224 112 224 WIRE 304 240 304 128 WIRE 304 240 192 240 WIRE 32 256 -48 256 WIRE 112 256 32 256 WIRE 128 256 112 256 WIRE -48 272 -48 256 WIRE 32 272 32 256 WIRE -288 320 -288 304 WIRE -176 320 -176 304 WIRE -48 368 -48 336 WIRE 32 368 32 352 WIRE 112 368 112 256 WIRE 128 368 112 368 WIRE 208 368 192 368 WIRE 304 368 304 240 WIRE 304 368 288 368 WIRE -288 416 -288 400 WIRE -176 416 -176 400 WIRE -80 464 -80 176 WIRE 32 464 -80 464 WIRE 176 464 32 464 WIRE 304 464 304 368 WIRE 304 464 240 464 WIRE -80 480 -80 464 WIRE 32 496 32 464 WIRE -80 576 -80 560 WIRE 32 576 32 560 FLAG 160 208 +V FLAG 160 272 -V FLAG -288 304 +V FLAG -176 416 0 FLAG -288 416 0 FLAG -176 304 -V FLAG 32 368 0 FLAG -48 368 0 FLAG -144 128 0 FLAG 32 576 0 FLAG -80 576 0 SYMBOL voltage -288 304 R0 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL voltage -176 304 R0 SYMATTR InstName V2 SYMATTR Value -15 SYMBOL res 272 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 10K SYMBOL res 96 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 4.9K SYMBOL res 304 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10K SYMBOL res 16 368 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL cap 192 352 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value .01µ SYMBOL cap -64 272 R0 SYMATTR InstName C2 SYMATTR Value .01µ SYMBOL njf -16 176 M270 WINDOW 0 49 47 VTop 2 WINDOW 3 -7 52 VLeft 2 SYMATTR InstName Q1 SYMATTR Value U309 SYMBOL diode 176 448 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL res -96 464 R0 SYMATTR InstName R5 SYMATTR Value 1Meg SYMBOL cap 16 560 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL opamps\\LT1001 160 176 R0 SYMATTR InstName U1 TEXT 168 560 Left 2 !.tran 0 .5 0 10u startup TEXT 56 616 Top 1 ;This example schematic is supplied for informational/educational purposes only.