Version 4
SHEET 1 1364 680
WIRE 368 -240 368 -256
WIRE 544 -240 544 -272
WIRE 368 -144 368 -160
WIRE 544 -144 544 -160
WIRE 16 32 -112 32
WIRE 432 32 304 32
WIRE 832 32 704 32
WIRE 1168 32 1040 32
WIRE 192 64 160 64
WIRE 304 64 304 32
WIRE 304 64 256 64
WIRE -336 112 -448 112
WIRE -224 112 -256 112
WIRE -208 112 -224 112
WIRE -112 112 -112 32
WIRE -112 112 -144 112
WIRE 608 112 576 112
WIRE 704 112 704 32
WIRE 704 112 672 112
WIRE 944 112 928 112
WIRE 1040 112 1040 32
WIRE 1040 112 1024 112
WIRE -48 128 -48 96
WIRE 368 128 368 96
WIRE 768 128 768 96
WIRE 1104 128 1104 96
WIRE -448 144 -448 112
WIRE -112 144 -112 112
WIRE -80 144 -112 144
WIRE 16 144 16 32
WIRE 48 144 16 144
WIRE 160 144 160 64
WIRE 160 144 128 144
WIRE 192 144 160 144
WIRE 304 144 304 64
WIRE 304 144 256 144
WIRE 336 144 304 144
WIRE 432 144 432 32
WIRE 464 144 432 144
WIRE 576 144 576 112
WIRE 576 144 544 144
WIRE 704 144 704 112
WIRE 736 144 704 144
WIRE 1040 144 1040 112
WIRE 1072 144 1040 144
WIRE 16 160 16 144
WIRE 16 160 -16 160
WIRE 432 160 432 144
WIRE 432 160 400 160
WIRE 832 160 832 32
WIRE 832 160 800 160
WIRE 864 160 832 160
WIRE 928 160 928 112
WIRE 1168 160 1168 32
WIRE 1168 160 1136 160
WIRE 1200 160 1168 160
WIRE 1296 160 1264 160
WIRE -80 176 -112 176
WIRE 336 176 304 176
WIRE 736 176 704 176
WIRE 1072 176 1040 176
WIRE 1296 192 1296 160
WIRE -224 208 -224 112
WIRE -208 208 -224 208
WIRE -112 208 -112 176
WIRE -112 208 -128 208
WIRE 160 208 160 144
WIRE 192 208 160 208
WIRE 288 208 272 208
WIRE 304 208 304 176
WIRE 304 208 288 208
WIRE 576 208 576 144
WIRE 592 208 576 208
WIRE 704 208 704 176
WIRE 704 208 672 208
WIRE 928 208 928 160
WIRE 960 208 928 208
WIRE 1040 208 1040 176
WIRE 1040 208 1024 208
WIRE -112 224 -112 208
WIRE -48 224 -48 192
WIRE 288 224 288 208
WIRE 368 224 368 192
WIRE 704 224 704 208
WIRE 768 224 768 192
WIRE 1040 224 1040 208
WIRE 1104 224 1104 192
WIRE -448 272 -448 224
WIRE 1296 304 1296 272
WIRE -112 320 -112 288
WIRE 288 320 288 288
WIRE 704 320 704 288
WIRE 976 336 976 320
WIRE 1040 336 1040 304
WIRE 1040 336 976 336
FLAG -48 224 0
FLAG 368 224 0
FLAG 768 224 0
FLAG 1104 224 0
FLAG -48 96 +12V
FLAG 368 96 +12V
FLAG 768 96 +12V
FLAG 1104 96 +12V
FLAG 368 -256 +12V
FLAG 368 -144 0
FLAG -112 320 0
FLAG 288 320 0
FLAG 704 320 0
FLAG 976 320 +5V
FLAG 544 -272 +5V
FLAG 544 -144 0
FLAG 1296 304 0
FLAG -448 272 0
SYMBOL voltage 368 -256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL res -112 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R28
SYMATTR Value 33k
SYMBOL res -240 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R29
SYMATTR Value 33k
SYMBOL cap -144 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C13
SYMATTR Value 47nF
SYMBOL cap -128 224 R0
SYMATTR InstName C14
SYMATTR Value 1nF
SYMBOL res 144 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R30
SYMATTR Value 47k
SYMBOL res 560 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R32
SYMATTR Value 36k
SYMBOL res 288 192 R90
WINDOW 0 45 97 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R31
SYMATTR Value 47k
SYMBOL cap 272 224 R0
SYMATTR InstName C16
SYMATTR Value 1nF
SYMBOL cap 256 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C53
SYMATTR Value 3.3nF
SYMBOL cap 256 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C15
SYMATTR Value 33nF
SYMBOL res 688 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R33
SYMATTR Value 36k
SYMBOL cap 672 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C17
SYMATTR Value 39nF
SYMBOL cap 688 224 R0
SYMATTR InstName C18
SYMATTR Value 1nF
SYMBOL cap 928 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C20
SYMATTR Value 2.2nF
SYMBOL cap 1024 192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C19
SYMATTR Value 2.2nF
SYMBOL res 1040 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R34
SYMATTR Value 10k
SYMBOL res 1024 208 R0
SYMATTR InstName R35
SYMATTR Value 750k
SYMBOL voltage 544 -256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL cap 1264 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C21
SYMATTR Value 10µF
SYMBOL res 1280 176 R0
SYMATTR InstName R36
SYMATTR Value 5k
SYMBOL Misc\\signal -448 128 R0
WINDOW 123 24 132 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 1 0
SYMATTR InstName V3
SYMATTR Value SINE(6 0.1 1K)
SYMBOL Opamps\\OP37 -48 96 R0
SYMATTR InstName U1
SYMBOL Opamps\\OP37 368 96 R0
SYMATTR InstName U2
SYMBOL Opamps\\OP37 768 96 R0
SYMATTR InstName U3
SYMBOL Opamps\\OP37 1104 96 R0
SYMATTR InstName U4
TEXT -480 368 Left 2 !.ac dec 500 10 10000