Electrical transmission or interconnection systems – Anti-induction or coupling to other systems – Magnetic or electrostatic field control
Patent
1995-04-14
1997-06-03
Elms, Richard T.
Electrical transmission or interconnection systems
Anti-induction or coupling to other systems
Magnetic or electrostatic field control
333182, 361816, 361818, H05K 900
Patent
active
056357753
ABSTRACT:
An electro-magnetic interference suppressor includes a segmented array of ceramic feed-through capacitors, and a conductive fence which is attached to the capacitor array about its periphery. The fence is attached to a ground of a printed circuit board such that a generally planar surface of the segmented array lies adjacent to a planar surface of the printed circuit board. The suppressor provides an effective filter for eliminating unwanted noise occurring in electronic circuitry. The fence, in one embodiment, is surface mounted and soldered to a surface ground pad of the printed circuit board. In another embodiment, the fence includes a ground pin which extends into printed circuit board for contact with the circuit board ground. The ground pin may be soldered in place or may include a compliant section for press-fit reception within a through-hole. Conductive pins extend through respective ones of the feed-through capacitors, and in one embodiment ends of these pins abut a surface circuit pad of the printed circuit board. In other embodiments the ends of the conductive pins extend into receiving apertures in the circuit board where they are either press-fit or soldered in place.
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Colburn Richard H.
Hosmer Donald F.
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