Version 4
SHEET 1 1164 680
WIRE -16 96 -128 96
WIRE 80 96 64 96
WIRE 112 96 80 96
WIRE 208 96 176 96
WIRE 224 96 208 96
WIRE 320 96 304 96
WIRE 352 96 320 96
WIRE 512 96 416 96
WIRE 528 96 512 96
WIRE 624 96 608 96
WIRE 656 96 624 96
WIRE 752 96 720 96
WIRE 768 96 752 96
WIRE 864 96 848 96
WIRE 896 96 864 96
WIRE 1056 96 960 96
WIRE -128 112 -128 96
WIRE -128 208 -128 192
WIRE 144 208 144 192
WIRE 384 208 384 192
WIRE 688 208 688 192
WIRE 928 208 928 192
WIRE 80 224 80 96
WIRE 112 224 80 224
WIRE 320 224 320 96
WIRE 352 224 320 224
WIRE 624 224 624 96
WIRE 656 224 624 224
WIRE 864 224 864 96
WIRE 896 224 864 224
WIRE 208 240 208 96
WIRE 208 240 176 240
WIRE 512 240 512 96
WIRE 512 240 416 240
WIRE 752 240 752 96
WIRE 752 240 720 240
WIRE 1056 240 1056 96
WIRE 1056 240 960 240
WIRE 1072 240 1056 240
WIRE 112 256 80 256
WIRE 352 256 320 256
WIRE 656 256 624 256
WIRE 896 256 880 256
WIRE 144 288 144 272
WIRE 384 288 384 272
WIRE 688 288 688 272
WIRE 928 288 928 272
WIRE 80 336 80 256
WIRE 144 336 80 336
WIRE 512 336 512 240
WIRE 512 336 224 336
WIRE 624 336 624 256
WIRE 720 336 624 336
WIRE 1056 336 1056 240
WIRE 1056 336 800 336
WIRE 208 416 144 416
WIRE 320 416 320 256
WIRE 320 416 288 416
WIRE 416 416 320 416
WIRE 880 416 880 256
WIRE 880 416 416 416
WIRE 144 432 144 416
WIRE 320 432 320 416
WIRE 416 448 416 416
WIRE 144 528 144 512
WIRE 320 528 320 512
WIRE 416 528 416 512
FLAG -128 208 0
FLAG 144 192 +V
FLAG 144 416 +V
FLAG 144 288 0
FLAG 384 192 +V
FLAG 384 288 0
FLAG 688 192 +V
FLAG 688 288 0
FLAG 928 192 +V
FLAG 928 288 0
FLAG 320 528 0
FLAG 144 528 0
FLAG 416 528 0
FLAG 1072 240 OUT
FLAG -128 96 IN
SYMBOL voltage -128 96 R0
WINDOW 3 38 62 Left 2
WINDOW 123 34 105 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value {3.3/2}
SYMATTR Value2 AC 1
SYMATTR InstName V1
SYMBOL res 80 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 301K
SYMBOL cap 176 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1000p
SYMBOL res 320 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 86K
SYMBOL cap 416 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1000p
SYMBOL res 624 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 121K
SYMBOL cap 720 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res 864 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 221K
SYMBOL cap 960 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1000p
SYMBOL res 240 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 301K
SYMBOL res 816 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 121K
SYMBOL res 304 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 50K
SYMBOL res 304 528 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R8
SYMATTR Value 50K
SYMBOL voltage 144 416 R0
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL cap 400 448 R0
SYMATTR InstName C5
SYMATTR Value 1µ
SYMBOL opamps\\LT2179A 144 176 R0
SYMATTR InstName U1
SYMBOL opamps\\LT2179A 384 176 R0
SYMATTR InstName U2
SYMBOL opamps\\LT2179A 688 176 R0
SYMATTR InstName U3
SYMBOL opamps\\LT2179A 928 176 R0
SYMATTR InstName U4
TEXT 672 464 Left 2 !.ac oct 100 100 10K