Radio frequency low hum-modulation ac bypass coil

H - Electricity – 01 – F

Patent

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Details

H01F 27/42 (2006.01) H01F 17/04 (2006.01)

Patent

CA 2204559

A radio frequency choke for use in a cable television transmission and distribution circuit is disclosed. The radio frequency choke comprises a core of zinc-ferrite material as provided by MMG/NEOSID, Ltd., part number 31P0250012, and a wire coil wound around the core. The coil includes a first lead, a first clockwise winding of N1 turns around the core, the first lead being connected to an input of the first winding, a second counterclockwise winding of N2 turns around the core, a third counterclockwise winding of N3 turns around the core, and a second lead connected to an output of the fourth winding. In a preferred embodiment, there are six turns in the first clockwise winding, five turns in the second clockwise winding, and five turns in the third counterclockwise winding. Moreover, in the preferred embodiment, resonance damping resistors of approximately 2 K.OMEGA. are connected between the windings of the radio frequency choke.

Bobine d'arrêt RF pour circuit de distribution et de transmission de télévision par câble. Comprend un noyau de zinc-ferrite fourni par MMG/NEOSID, Ltd., numéro de pièce 31P0250012, et une bobine de fil enroulée autour du noyau. La bobine de fil comprend un premier fil conducteur, un premier enroulement en sens horaire de N1 tours autour du noyau, le premier fil conducteur étant connecté à une entrée du premier enroulement, un deuxième enroulement en sens antihoraire de N2 tours autour du noyau, un troisième enroulement en sens antihoraire de N3 tours autour du noyau, et un deuxième fil conducteur connecté à la sortie du quatrième enroulement. Dans une version préférée, le premier enroulement en sens horaire compte six tours, le deuxième enroulement en sens horaire cinq tours et le troisième enroulement en sens antihoraire cinq tours. En outre, dans la version préférée, des résistances d'amortissement de résonance d'environ 2 K.OMEGA. sont connectées entre les enroulements de la bobine d'arrêt.

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