Version 4
SHEET 1 880 680
WIRE -272 160 -272 80
WIRE -272 192 -272 160
WIRE -272 432 -272 272
WIRE -224 80 -272 80
WIRE -128 256 -128 240
WIRE -128 272 -128 256
WIRE -48 80 -144 80
WIRE -48 128 -48 80
WIRE -48 160 -48 128
WIRE -48 176 -48 160
WIRE -48 256 -128 256
WIRE -48 256 -48 240
WIRE -48 432 -272 432
WIRE -48 432 -48 256
WIRE 64 240 64 192
WIRE 64 256 64 240
WIRE 64 432 -48 432
WIRE 64 432 64 336
WIRE 80 160 -48 160
WIRE 80 192 64 192
WIRE 144 240 64 240
WIRE 160 176 144 176
WIRE 160 400 160 384
WIRE 192 80 -48 80
WIRE 192 176 160 176
WIRE 192 384 160 384
WIRE 192 432 64 432
WIRE 192 432 192 384
WIRE 320 80 272 80
WIRE 320 176 272 176
WIRE 320 176 320 80
WIRE 320 240 224 240
WIRE 320 240 320 176
WIRE 320 256 320 240
WIRE 320 352 320 320
WIRE 320 432 192 432
WIRE 320 432 320 416
FLAG 160 400 0
FLAG 112 144 V+
FLAG 112 208 V-
FLAG -128 352 V-
FLAG -128 160 V+
FLAG 160 176 Out
FLAG -272 160 Vc
FLAG -48 128 t
SYMBOL Robertugo\\OPAMP5 112 112 R0
WINDOW 0 -25 64 Left 0
WINDOW 38 -145 31 Left 0
SYMATTR InstName U1
SYMATTR SpiceModel TL072
SYMBOL cap -64 176 R0
SYMATTR InstName C1
SYMATTR Value 4n7
SYMBOL res 48 240 R0
WINDOW 0 -33 33 Left 0
WINDOW 3 -43 65 Left 0
SYMATTR InstName R1
SYMATTR Value 10k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -128 64 R90
WINDOW 0 14 110 VBottom 0
WINDOW 3 -15 -20 VTop 0
SYMATTR InstName R3
SYMATTR Value 150k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 288 64 R90
WINDOW 0 16 110 VBottom 0
WINDOW 3 -13 -6 VTop 0
SYMATTR InstName R2
SYMATTR Value 100K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 288 160 R90
WINDOW 0 0 60 VBottom 0
WINDOW 3 33 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 240 224 R90
WINDOW 0 70 84 VBottom 0
WINDOW 3 42 28 VTop 0
SYMATTR InstName R5
SYMATTR Value 100K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL zener 304 256 R0
WINDOW 3 24 72 Invisible 0
WINDOW 0 -20 2 Left 0
SYMATTR Value BZX84C6V2L
SYMATTR InstName D1
SYMBOL zener 336 416 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Invisible 0
SYMATTR InstName D2
SYMATTR Value BZX84C6V2L
SYMBOL voltage -128 256 R0
WINDOW 0 17 97 Left 0
WINDOW 3 -14 60 Left 0
WINDOW 123 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMATTR SpiceLine Rser=1 Cpar=100n
SYMBOL voltage -128 144 R0
WINDOW 3 -14 60 Left 0
WINDOW 123 0 0 Left 0
SYMATTR Value 15
SYMATTR InstName V2
SYMATTR SpiceLine Rser=1 Cpar=100n
SYMBOL voltage -272 176 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 -14 61 Left 0
WINDOW 3 330 275 Right 0
SYMATTR InstName Vc
SYMATTR Value PULSE(-5 5 0 10m 10m 0 20m)
TEXT 6 66 Left 0 !.tran 20m