Version 4
SHEET 1 1144 680
WIRE 64 64 -128 64
WIRE 176 64 64 64
WIRE -128 112 -128 64
WIRE 176 112 176 64
WIRE -128 240 -128 192
WIRE 176 240 176 176
WIRE 176 240 -128 240
WIRE -128 272 -128 240
FLAG -128 272 0
FLAG 64 64 IND
SYMBOL current -128 192 M180
WINDOW 0 24 88 Left 0
WINDOW 3 24 0 Left 0
WINDOW 123 24 -28 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value {IDC}
SYMATTR Value2 AC 1
SYMBOL ferritebead_steward_d 176 144 R0
SYMATTR InstName FB1
TEXT -136 -72 Left 0 !.step param IDC -.4 .4 .1
TEXT -136 -16 Left 0 !.ac dec 100 1MEG 1G
TEXT -136 -104 Left 0 !.param IDC 0
TEXT -128 -520 Left 0 ;Ferrite Bead Models With A Drop-Down Subcircuit Symbol\nHelmut Sennewald, 08/24/2006\n \nA current source drives 1A AC into the bead.\nThe impedance(Ohm) value is then equivalent to the measured voltage value.\nPlot V(ind)/1A to get the unit Ohm.\n \nA drop-down subcircuit symbol "FerriteBead_Steward_d.asy" has been used.\nThe original library file "stewards v1 05.lib" has been copied to "steward_beads.lib".\nThis symbol requires the libary file "steward_beads.lib" in the search-\npath of LTspice. Search path: 1. working directory, 2. LTC\\SwCADIII\\lib\\sub \n \nRightMouseClick on the bead, drop-down a list and choose your model \nin the field "SpiceModel". That's why I named it drop-down symbol.