Version 4
SHEET 1 884 680
WIRE 80 -96 48 -96
WIRE 240 -96 80 -96
WIRE 272 -96 240 -96
WIRE 304 -96 272 -96
WIRE 416 -96 384 -96
WIRE 448 -96 416 -96
WIRE 544 -96 448 -96
WIRE 688 -96 544 -96
WIRE 832 -96 688 -96
WIRE 80 -80 80 -96
WIRE 544 -32 544 -96
WIRE 832 -32 832 -96
WIRE 48 0 48 -96
WIRE 48 0 16 0
WIRE -48 16 -80 16
WIRE 80 16 80 0
WIRE 240 16 80 16
WIRE 48 32 16 32
WIRE 80 32 80 16
WIRE 688 96 688 -96
WIRE 688 96 640 96
WIRE 736 96 688 96
WIRE 544 112 544 48
WIRE 576 112 544 112
WIRE 832 112 832 48
WIRE 832 112 800 112
WIRE 48 128 48 32
WIRE 80 128 80 112
WIRE 80 128 48 128
WIRE 112 128 80 128
WIRE 384 128 336 128
WIRE 544 128 544 112
WIRE 672 128 640 128
WIRE 736 128 704 128
WIRE 832 128 832 112
WIRE 80 144 80 128
WIRE 112 224 112 128
WIRE 144 224 112 224
WIRE 544 224 544 208
WIRE 608 224 544 224
WIRE 672 224 672 128
WIRE 672 224 608 224
WIRE 704 224 704 128
WIRE 768 224 704 224
WIRE 832 224 832 208
WIRE 832 224 768 224
WIRE -80 240 -80 16
WIRE 80 240 80 224
WIRE 80 240 -80 240
WIRE 240 240 240 16
WIRE 240 240 208 240
WIRE 80 256 80 240
WIRE 144 256 112 256
WIRE 608 256 608 224
WIRE 768 256 768 224
WIRE -32 336 -64 336
WIRE 80 336 80 320
WIRE 80 336 48 336
WIRE 112 336 112 256
WIRE 112 336 80 336
WIRE 608 368 608 336
WIRE 768 368 768 336
FLAG 176 208 V+
IOPIN 176 208 Out
FLAG 176 272 V-
IOPIN 176 272 Out
FLAG -64 336 0
FLAG -16 48 V+
IOPIN -16 48 Out
FLAG -16 -16 V-
IOPIN -16 -16 Out
FLAG 240 -32 0
FLAG 448 -32 0
FLAG 608 144 V+
IOPIN 608 144 Out
FLAG 608 80 V-
IOPIN 608 80 Out
FLAG 608 368 0
FLAG 768 368 0
FLAG 768 80 V-
IOPIN 768 80 Out
FLAG 768 144 V+
IOPIN 768 144 Out
FLAG 384 48 V+
IOPIN 384 48 Out
FLAG 384 208 V-
IOPIN 384 208 Out
FLAG 336 128 0
FLAG 272 -96 Y
IOPIN 272 -96 Out
FLAG 416 -96 X
IOPIN 416 -96 Out
SYMBOL Opamps\\opamp2 176 176 R0
SYMATTR InstName U1
SYMATTR Value TL074
SYMATTR SpiceModel TL074
SYMBOL res 96 240 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 96 128 R180
WINDOW 0 -29 69 Left 2
WINDOW 3 -25 43 Left 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 96 16 R180
WINDOW 0 -29 69 Left 2
WINDOW 3 -33 44 Left 2
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL res -48 352 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 2138
SYMBOL cap 64 256 R0
WINDOW 0 -16 8 Left 2
WINDOW 3 -41 53 Left 2
SYMATTR InstName C1
SYMATTR Value 0.1µF
SYMBOL Opamps\\opamp2 -16 80 R180
SYMATTR InstName U2
SYMATTR Value TL074
SYMATTR SpiceModel TL074
SYMBOL res 400 -112 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1771
SYMBOL cap 224 -96 R0
WINDOW 0 25 14 Left 2
WINDOW 3 24 50 Left 2
SYMATTR InstName C2
SYMATTR Value 0.1µF
SYMBOL cap 432 -96 R0
WINDOW 0 29 15 Left 2
WINDOW 3 25 51 Left 2
SYMATTR InstName C3
SYMATTR Value 10nF
SYMBOL res 528 -48 R0
SYMATTR InstName R6
SYMATTR Value 220
SYMBOL res 528 112 R0
WINDOW 0 -30 42 Left 2
WINDOW 3 -36 75 Left 2
SYMATTR InstName R7
SYMATTR Value 220
SYMBOL res 816 -48 R0
SYMATTR InstName R8
SYMATTR Value 22k
SYMBOL res 816 112 R0
SYMATTR InstName R9
SYMATTR Value 22k
SYMBOL Opamps\\opamp2 608 176 R180
SYMATTR InstName U3
SYMATTR Value TL074
SYMATTR SpiceModel TL074
SYMBOL Opamps\\opamp2 768 176 M180
SYMATTR InstName U4
SYMATTR Value TL074
SYMATTR SpiceModel TL074
SYMBOL res 592 240 R0
SYMATTR InstName R10
SYMATTR Value 2.2k
SYMBOL res 752 240 R0
SYMATTR InstName R11
SYMATTR Value 3.3k
SYMBOL voltage 384 32 R0
WINDOW 3 -13 58 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value 10
SYMATTR InstName V1
SYMBOL voltage 384 112 R0
WINDOW 3 -12 58 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value 10
SYMATTR InstName V2
TEXT 296 360 Left 2 !.include TL074.sub
TEXT 296 320 Left 2 !.tran .1s