Patent ID: 6385315
Filing Date: 2002-05-07
Classification: H04L,H04M,H04N,H04Q

Abstract:
A filter for reduction of noise in telephony equipment, comprising:a first plurality of inductors connected in series in a first leg of a balanced line configuration of fiter; a second plurality of inductors connected in series in a second leg of said balanced line configuration of filter; a plurality of capacitor connected as cross branches between terminals of the inductors; and a substrate for supporting the capacitors and the inductors, wherein said inductors are toroidally wound inductors comprising toroidal cores of magnetic saturation inhibiting material, the saturation inhibiting core material allowing reduction in size of a cross-sectional dimension of each of the cores to approximately the cross-sectional dimension of one of said capacitors; and wherein there is an inductor of said first plurality of inductors which is positioned in said balanced line symmetrically to an inductor of said second plurality of inductors, symmetrically positioned ones of said inductors sharing a common one of said toroidal cores for reduction in size of the filter.