Version 4 SHEET 1 880 680 WIRE 96 -240 -48 -240 WIRE -48 -224 -48 -240 WIRE -112 -176 -240 -176 WIRE 256 -48 240 -48 WIRE 336 -48 320 -48 WIRE 240 -16 240 -48 WIRE -112 0 -112 -176 WIRE 48 0 -112 0 WIRE 96 16 96 -240 WIRE 160 16 96 16 WIRE 48 32 48 0 WIRE 128 32 48 32 WIRE 240 32 240 -16 WIRE 256 32 240 32 WIRE 336 32 336 -48 WIRE 160 64 160 16 WIRE 240 64 240 32 WIRE 128 128 128 32 WIRE 160 128 128 128 WIRE 160 144 160 128 WIRE 240 144 240 64 WIRE 256 144 240 144 WIRE 336 160 336 32 WIRE 336 160 320 160 WIRE 256 176 240 176 WIRE 240 192 240 176 FLAG -16 272 0 FLAG 80 272 0 FLAG 80 144 0 FLAG -16 144 0 FLAG -16 64 +12V FLAG 80 64 -12V FLAG -16 192 -10V FLAG 80 192 +3V3 FLAG 288 192 0 FLAG 288 128 +3V3 FLAG 240 192 0 FLAG 160 -16 -10V FLAG -48 -144 0 FLAG -240 -96 0 SYMBOL voltage -16 48 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage 80 48 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value -12 SYMBOL voltage -16 176 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value -10 SYMBOL voltage 80 176 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value 3.3 SYMBOL res 352 16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 33k SYMBOL res 256 48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 256 128 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 100k SYMBOL res 256 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 200k SYMBOL voltage -48 -240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V5 SYMATTR Value SINE(0 2.5 10) SYMBOL voltage -240 -192 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V6 SYMATTR Value SINE(0 2.5 10000) SYMBOL Opamps\\LT1677 288 96 R0 SYMATTR InstName U2 SYMBOL cap 320 -64 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 4.7n TEXT -274 296 Left 2 !.tran 2