Version 4
SHEET 1 880 680
WIRE -176 128 -176 80
WIRE -176 224 -176 208
WIRE -176 272 -176 224
WIRE -176 368 -176 352
WIRE -144 368 -176 368
WIRE -144 416 -144 368
WIRE -128 80 -176 80
WIRE -96 224 -176 224
WIRE -96 272 -96 224
WIRE -96 368 -144 368
WIRE -96 368 -96 336
WIRE 0 144 0 112
WIRE 0 256 0 208
WIRE 0 368 -96 368
WIRE 0 368 0 336
WIRE 16 112 0 112
WIRE 64 176 32 176
WIRE 64 192 64 176
WIRE 64 256 64 192
WIRE 64 352 64 336
WIRE 96 192 64 192
WIRE 96 224 -96 224
WIRE 112 352 64 352
WIRE 112 352 112 256
WIRE 128 112 96 112
WIRE 128 112 128 64
WIRE 128 176 128 112
WIRE 128 352 128 240
WIRE 176 256 112 256
WIRE 176 368 0 368
WIRE 176 368 176 336
WIRE 208 80 -64 80
WIRE 208 208 160 208
WIRE 208 208 208 80
WIRE 256 64 128 64
WIRE 256 192 256 64
WIRE 256 352 128 352
WIRE 256 352 256 272
WIRE 320 240 320 224
WIRE 352 64 256 64
WIRE 352 128 352 64
WIRE 352 224 320 224
WIRE 352 224 352 208
WIRE 352 256 352 224
WIRE 352 352 256 352
WIRE 352 352 352 336
FLAG 320 240 0
FLAG -144 416 0
SYMBOL voltage 256 176 R0
WINDOW 3 -5 59 Left 0
SYMATTR InstName V1
SYMATTR Value 30
SYMBOL Robertugo\\OPAMP5 128 144 R0
WINDOW 0 -26 64 Left 0
WINDOW 38 7 16 Left 0
SYMATTR InstName U1
SYMATTR SpiceModel TL082
SYMBOL res 336 112 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 336 240 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL cap -112 272 R0
SYMATTR InstName C1
SYMATTR Value 4n7
SYMBOL res -192 256 R0
SYMATTR InstName R3
SYMATTR Value 33k
SYMBOL res -192 112 R0
WINDOW 3 29 90 Left 0
SYMATTR InstName R4
SYMATTR Value 16k
SYMBOL cap -64 64 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL res 112 96 R90
WINDOW 0 16 104 VBottom 0
WINDOW 3 -13 10 VTop 0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL Robertugo\\Pote 16 240 R180
SYMATTR InstName U2
SYMATTR Value Rt=27k
SYMATTR Value2 Set={cursor}
SYMBOL res -16 240 R0
WINDOW 0 -24 31 Left 0
WINDOW 3 -28 62 Left 0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 48 240 R0
WINDOW 0 -24 31 Left 0
WINDOW 3 -28 62 Left 0
SYMATTR InstName R7
SYMATTR Value 68k
SYMBOL voltage 176 240 R0
WINDOW 3 9 127 Left 0
WINDOW 123 15 97 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(0 1 1k)
SYMATTR Value2 AC 1
TEXT -66 66 Left 0 !.ac dec 100 100 10k
TEXT 144 48 Left 0 !.step param cursor 0 1 .2