Version 4
SHEET 1 880 680
WIRE 192 -64 48 -64
WIRE 144 16 48 16
WIRE 48 32 48 16
WIRE 144 96 144 16
WIRE -304 112 -416 112
WIRE -192 112 -224 112
WIRE -96 112 -192 112
WIRE 0 112 -96 112
WIRE 112 112 0 112
WIRE 224 128 176 128
WIRE 496 128 224 128
WIRE 112 144 80 144
WIRE 144 176 144 160
WIRE 192 176 192 -64
WIRE 192 176 144 176
WIRE -96 192 -96 112
WIRE -192 208 -192 176
WIRE -416 240 -416 192
WIRE 0 240 0 176
WIRE 80 240 80 144
WIRE 80 240 0 240
WIRE 112 240 80 240
WIRE 224 240 224 128
WIRE 224 240 192 240
WIRE 288 240 224 240
WIRE 432 240 368 240
WIRE -288 320 -432 320
WIRE -240 320 -288 320
WIRE -96 320 -96 256
WIRE -96 320 -176 320
WIRE -64 320 -96 320
WIRE 80 320 80 240
WIRE 80 320 16 320
WIRE 144 320 80 320
WIRE 224 320 224 240
WIRE 224 320 208 320
WIRE 304 320 224 320
WIRE 432 320 432 240
WIRE 432 320 368 320
WIRE 496 320 432 320
WIRE -288 352 -288 320
WIRE 80 352 80 320
WIRE 368 352 368 320
WIRE 432 352 432 320
WIRE -432 400 -432 320
WIRE -288 448 -288 432
WIRE 80 448 80 432
WIRE 432 448 432 432
WIRE -432 544 -432 480
WIRE -288 544 -288 512
WIRE 80 544 80 512
WIRE 368 544 368 432
WIRE 432 544 432 512
FLAG -192 208 0
FLAG -416 240 0
FLAG 80 544 0
FLAG 432 544 0
FLAG -288 544 0
FLAG 48 32 0
FLAG -96 320 TP1
FLAG 0 112 OP+
FLAG 80 240 OP-
FLAG -432 320 IN
IOPIN -432 320 In
FLAG 496 320 OUT2
IOPIN 496 320 Out
FLAG -432 544 0
FLAG 496 128 OU1
IOPIN 496 128 Out
FLAG 368 544 0
SYMBOL cap -16 112 R0
WINDOW 0 26 11 Left 2
WINDOW 3 21 51 Left 2
SYMATTR InstName C15
SYMATTR Value 470pF
SYMBOL cap -208 112 R0
WINDOW 0 31 15 Left 2
SYMATTR InstName C64
SYMATTR Value 1nF
SYMBOL voltage -416 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 6V
SYMBOL res -208 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R60
SYMATTR Value 47k
SYMBOL cap -112 192 R0
SYMATTR InstName C45
SYMATTR Value 33nF
SYMBOL res 32 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R20
SYMATTR Value 3.3k
SYMBOL cap 96 512 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C48
SYMATTR Value 22µF
SYMBOL res 96 448 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R62
SYMATTR Value 5.6k
SYMBOL res 208 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 6.8k
SYMBOL cap 208 304 R90
WINDOW 0 15 65 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C59
SYMATTR Value 22pF
SYMBOL res 384 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 368 304 R90
WINDOW 0 13 65 VBottom 2
WINDOW 3 21 77 VTop 2
SYMATTR InstName C11
SYMATTR Value 2.2nF
SYMBOL res 416 336 R0
SYMATTR InstName R58
SYMATTR Value 10k
SYMBOL cap 416 448 R0
WINDOW 0 32 4 Left 2
SYMATTR InstName C43
SYMATTR Value 10nF
SYMBOL cap -176 304 R90
WINDOW 0 13 59 VBottom 2
WINDOW 3 36 32 VTop 2
SYMATTR InstName C17
SYMATTR Value 33nF
SYMBOL res -304 336 R0
SYMATTR InstName R16
SYMATTR Value 10k
SYMBOL cap -304 448 R0
SYMATTR InstName C33
SYMATTR Value 1nF
SYMBOL voltage 48 -80 R0
WINDOW 3 46 59 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value 12V
SYMATTR InstName V3
SYMBOL Opamps\\UniversalOpamp2 144 128 M180
SYMATTR InstName IC2B
SYMBOL voltage -432 384 R0
WINDOW 3 -222 107 Left 2
WINDOW 123 -222 135 Left 2
WINDOW 39 0 0 Left 0
SYMATTR Value SINE(0 1 500)
SYMATTR Value2 AC AC 1.
SYMATTR InstName V2
SYMBOL res 352 336 R0
SYMATTR InstName R7
SYMATTR Value 10k
TEXT -488 -56 Left 2 !.ac lin 1000 10 20000