Version 4
SHEET 1 912 948
WIRE -560 128 -576 128
WIRE -544 128 -560 128
WIRE -464 128 -480 128
WIRE -448 128 -464 128
WIRE -224 128 -336 128
WIRE -32 128 -144 128
WIRE 288 144 176 144
WIRE 496 144 368 144
WIRE -576 160 -576 128
WIRE -480 160 -480 128
WIRE -336 240 -336 128
WIRE -224 240 -336 240
WIRE -32 240 -32 128
WIRE -32 240 -160 240
WIRE 176 256 176 144
WIRE 288 256 176 256
WIRE 496 256 496 144
WIRE 496 256 352 256
WIRE -576 272 -576 240
WIRE -480 272 -480 240
WIRE -160 320 -176 320
WIRE -144 320 -160 320
WIRE -176 336 -176 320
WIRE 352 336 336 336
WIRE 368 336 352 336
WIRE -336 352 -336 240
WIRE -208 352 -336 352
WIRE 336 352 336 336
WIRE -32 368 -32 240
WIRE -32 368 -144 368
WIRE 32 368 -32 368
WIRE 176 368 176 256
WIRE 176 368 112 368
WIRE 304 368 176 368
WIRE -208 384 -288 384
WIRE 464 384 368 384
WIRE 496 384 496 256
WIRE 496 384 464 384
WIRE 304 400 176 400
WIRE -288 432 -288 384
WIRE -176 432 -176 400
WIRE -160 432 -176 432
WIRE -144 432 -160 432
WIRE 176 448 176 400
WIRE 336 448 336 416
WIRE 352 448 336 448
WIRE 368 448 352 448
WIRE -336 544 -336 352
WIRE 32 544 -336 544
WIRE 496 544 496 384
WIRE 496 544 112 544
FLAG -576 272 0
FLAG -480 272 0
FLAG -560 128 Vee
FLAG -464 128 Vcc
FLAG -160 432 Vee
FLAG -160 320 Vcc
FLAG -288 432 0
FLAG 352 448 Vee
FLAG 352 336 Vcc
FLAG 176 448 0
FLAG -32 368 -V1
FLAG 464 384 -V2
SYMBOL ind 272 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L
SYMATTR Value flux=0.1*20m*tanh(x/20m)
SYMATTR SpiceLine Rser=1
SYMBOL voltage -480 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 30V
SYMBOL voltage -576 256 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 30V
SYMBOL Opamps\\UniversalOpamp2 -176 368 R0
SYMATTR InstName U
SYMATTR SpiceLine ilimit=3 rail=0 Vos=0 phimargin=45
SYMBOL cap -160 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 8uF
SYMBOL res -128 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 0.5k
SYMBOL res 128 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 0.5k
SYMBOL Opamps\\UniversalOpamp2 336 384 R0
SYMATTR InstName U1
SYMATTR SpiceLine ilimit=3 rail=0 Vos=0 phimargin=45
SYMBOL cap 352 240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 0.25uF
SYMBOL res 128 528 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 0.02k
TEXT -616 368 Left 2 !.tran 0 500m 0 0.1m
TEXT -608 336 Left 2 !.ic V(-V1)=0.1