Version 4 SHEET 1 880 680 WIRE 336 -80 224 -80 WIRE 496 -80 416 -80 WIRE 224 32 224 -80 WIRE 272 32 224 32 WIRE 400 32 336 32 WIRE 496 32 496 -80 WIRE 496 32 464 32 WIRE 32 144 -144 144 WIRE 224 144 224 32 WIRE 224 144 112 144 WIRE 352 144 224 144 WIRE 496 160 496 32 WIRE 496 160 416 160 WIRE 560 160 496 160 WIRE -144 176 -144 144 WIRE 352 176 304 176 WIRE 304 272 304 176 FLAG -624 144 V+ FLAG -544 144 V- FLAG 384 128 V+ FLAG 384 192 V- FLAG 304 272 0 FLAG -144 256 0 FLAG 560 240 0 SYMBOL voltage -624 128 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 10 SYMBOL voltage -544 128 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value -10 SYMBOL MyLib\\TL082 384 96 R0 SYMATTR InstName U1 SYMBOL voltage -144 160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 10 SYMBOL res 16 128 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 5000 SYMBOL zener 400 16 M90 WINDOW 0 -4 32 VBottom 2 WINDOW 3 36 32 VTop 2 SYMATTR InstName D2 SYMBOL res 432 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1000 SYMBOL res 544 144 R0 SYMATTR InstName R3 SYMATTR Value 10000 SYMBOL diode 336 16 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 TEXT -658 264 Left 2 !.dc V3 -20 20 1