Version 4
SHEET 1 880 680
WIRE 272 80 16 80
WIRE 576 80 272 80
WIRE 272 96 272 80
WIRE 16 112 16 80
WIRE 80 112 16 112
WIRE 192 112 160 112
WIRE 240 112 192 112
WIRE 496 112 480 112
WIRE 608 112 560 112
WIRE 624 112 608 112
WIRE 368 128 304 128
WIRE 400 128 368 128
WIRE 416 128 400 128
WIRE 576 128 576 80
WIRE 240 144 224 144
WIRE 416 144 416 128
WIRE 480 144 480 112
WIRE 544 144 480 144
WIRE 16 160 16 112
WIRE 480 160 480 144
WIRE 624 160 624 112
WIRE 624 160 608 160
WIRE 272 176 272 160
WIRE 544 176 528 176
WIRE 224 224 224 144
WIRE 256 224 224 224
WIRE 368 224 368 128
WIRE 368 224 336 224
WIRE 576 224 576 192
WIRE 416 240 416 224
WIRE 224 272 224 224
WIRE 256 272 224 272
WIRE 384 272 336 272
WIRE 480 272 480 240
WIRE 480 272 448 272
WIRE 16 288 16 240
WIRE 64 288 16 288
WIRE 192 288 192 112
WIRE 192 288 144 288
WIRE 224 320 224 272
WIRE 256 320 224 320
WIRE 624 320 624 160
WIRE 624 320 336 320
WIRE 16 336 16 288
WIRE 192 352 192 288
WIRE 528 352 528 176
WIRE 528 352 192 352
FLAG 16 336 0
FLAG 272 176 0
FLAG 576 224 0
FLAG 400 128 Sq
FLAG 608 112 Tri
SYMBOL voltage 16 144 R0
WINDOW 0 6 8 Left 0
WINDOW 3 -14 60 Left 0
SYMATTR InstName Vcc
SYMATTR Value 12
SYMBOL Robertugo\\opamp5 272 64 R0
WINDOW 0 -30 65 Left 0
WINDOW 38 20 88 Left 0
SYMATTR InstName U1
SYMATTR SpiceModel TL082
SYMBOL res 176 96 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -12 10 VTop 0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 160 272 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -12 10 VTop 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 352 208 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R3
SYMATTR Value 220k
SYMBOL Robertugo\\Pote 480 256 R90
WINDOW 0 -7 22 VRight 0
WINDOW 3 49 19 VRight 0
WINDOW 123 -19 104 VCenter 0
SYMATTR InstName F
SYMATTR Value Rt=500k
SYMBOL res 352 256 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -12 14 VTop 0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 400 128 R0
WINDOW 0 -26 29 Left 0
WINDOW 3 -28 63 Left 0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 352 304 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 464 144 R0
WINDOW 0 -26 29 Left 0
WINDOW 3 -28 63 Left 0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL Robertugo\\opamp5 576 96 R0
WINDOW 0 -30 65 Left 0
WINDOW 38 -35 166 Left 0
SYMATTR InstName U2
SYMATTR SpiceModel TL082
SYMBOL cap 560 96 R90
WINDOW 0 16 3 VBottom 0
WINDOW 3 -12 70 VTop 0
SYMATTR InstName Ct
SYMATTR Value 100p
TEXT 336 336 Left 0 !.tran 0 1m 0 100n