Version 4
SHEET 1 1256 680
WIRE 224 -176 160 -176
WIRE 304 -160 288 -160
WIRE 224 -144 0 -144
WIRE 864 -144 816 -144
WIRE 976 -144 944 -144
WIRE 1024 -144 976 -144
WIRE 1136 -144 1104 -144
WIRE 816 -112 816 -144
WIRE 304 -64 304 -160
WIRE 368 -64 304 -64
WIRE 464 -64 448 -64
WIRE 480 -64 464 -64
WIRE 592 -64 560 -64
WIRE -256 -32 -320 -32
WIRE 160 16 160 -176
WIRE 192 16 160 16
WIRE 304 16 304 -64
WIRE 304 16 272 16
WIRE -320 32 -320 -32
WIRE 160 32 160 16
WIRE 976 32 976 -144
WIRE 1008 32 976 32
WIRE 0 48 0 -144
WIRE 464 48 464 -64
WIRE 496 48 464 48
WIRE 1136 48 1136 -144
WIRE 1136 48 1072 48
WIRE 1184 48 1136 48
WIRE 592 64 592 -64
WIRE 592 64 560 64
WIRE 672 64 592 64
WIRE 784 64 752 64
WIRE 800 64 784 64
WIRE 944 64 880 64
WIRE 1008 64 944 64
WIRE 496 80 464 80
WIRE 160 128 160 112
WIRE 192 128 160 128
WIRE 304 128 272 128
WIRE 784 128 784 64
WIRE 944 128 944 64
WIRE -320 144 -320 112
WIRE -320 144 -400 144
WIRE -400 176 -400 144
WIRE -320 192 -320 144
WIRE 304 224 304 128
WIRE 368 224 304 224
WIRE 464 224 464 80
WIRE 464 224 448 224
WIRE 496 224 464 224
WIRE 608 224 576 224
WIRE 944 224 944 192
WIRE 608 256 608 224
WIRE 784 272 784 192
WIRE 1136 272 1136 48
WIRE 1136 272 784 272
WIRE 160 304 160 128
WIRE 224 304 160 304
WIRE -320 320 -320 272
WIRE -256 320 -320 320
WIRE 304 320 304 224
WIRE 304 320 288 320
WIRE 0 336 0 128
WIRE 224 336 0 336
WIRE 0 368 0 336
WIRE 0 464 0 448
FLAG -400 176 0
FLAG 0 464 0
FLAG 608 256 0
FLAG 944 224 0
FLAG 816 -112 0
SYMBOL voltage -320 16 R0
WINDOW 0 23 5 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL voltage -320 176 R0
SYMATTR InstName V3
SYMATTR Value -5V
SYMBOL voltage 0 32 R0
WINDOW 3 -54 99 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value 1V
SYMATTR InstName V1
SYMBOL res -16 352 R0
SYMATTR InstName R12
SYMATTR Value 10k
SYMBOL Opamps\\UniversalOpamp2 256 -160 R0
SYMATTR InstName U1
SYMBOL Opamps\\UniversalOpamp2 256 320 R0
SYMATTR InstName U2
SYMBOL res 288 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 15k
SYMBOL res 288 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 15k
SYMBOL res 176 16 M0
SYMATTR InstName R1
SYMATTR Value 1200
SYMBOL res 464 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 576 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL Opamps\\UniversalOpamp2 528 64 R0
SYMATTR InstName U3
SYMBOL res 464 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 592 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 768 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 43k
SYMBOL res 896 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 43k
SYMBOL cap 768 128 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 928 128 R0
WINDOW 0 29 14 Left 2
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL Opamps\\UniversalOpamp2 1040 48 R0
SYMATTR InstName U4
SYMBOL res 960 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 20k
SYMBOL res 1120 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 10k
TEXT -256 -32 Left 2 !VSP
TEXT -256 320 Left 2 !VSN
TEXT 256 -192 VLeft 2 !VSP
TEXT 256 -128 VRight 2 !VSN
TEXT 528 32 VLeft 2 !VSP
TEXT 256 288 VLeft 2 !VSP
TEXT 256 352 VRight 2 !VSN
TEXT 528 96 VRight 2 !VSN
TEXT 1040 16 VLeft 2 !VSP
TEXT 1040 80 VRight 2 !VSN
TEXT 1160 48 Left 2 !Vout
TEXT -8 496 Left 2 !.dc V1 -1V 1V 10m