> Total common mode inductance is 1 times L, not two times L. This is > because the windings are parallel with near infinite mutual coupling. It > is exactly like a bifilar filament choke.
Tom, Run it in any SPICE variant as proof that in CM, total apparent inductance is 2*L. For example, two 0.1H inductors: subckt CommModeChoke InA InB OutA OutB L1 InA OutA .1H L2 InB OutB .1H K1 L1 L2 0.99999999 .ends CommModeChoke Connect a source to InA and InB with a load to OutA and OutB. 73, Paul, W9AC _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
