Version 4 SHEET 1 880 680 WIRE 288 32 192 32 WIRE 192 128 192 32 WIRE 208 128 192 128 WIRE 288 144 288 32 WIRE 288 144 272 144 WIRE 176 160 112 160 WIRE 208 160 176 160 WIRE 176 224 176 160 WIRE 224 224 176 224 WIRE 304 288 304 224 WIRE 304 288 272 288 WIRE 112 304 112 160 FLAG -80 128 0 FLAG 16 128 0 FLAG -48 272 0 FLAG -80 48 12V FLAG 16 48 -12V FLAG -48 192 3V3 FLAG 272 368 0 FLAG 112 384 0 FLAG 240 176 0 FLAG 240 112 3V3 SYMBOL voltage -80 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage 16 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value -12 SYMBOL voltage -48 176 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 3.3 SYMBOL Opamps\\UniversalOpamp2 240 144 R0 SYMATTR InstName U1 SYMBOL voltage 272 272 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V5 SYMATTR Value SINE(4 5 20) SYMBOL res 96 288 R0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL res 320 208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 200k TEXT -112 296 Left 2 !.tran 2