Discrete Cofired Feedthrough Filter for Medical Implanted Devices
AssigneeAVX Corporation
InventorAndrew P. Ritter
Life of this patent
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Abstract
Discrete cofired feedthrough filters are provided for medical implanted device applications. A plurality of discrete vertical feedthrough filter elements are respectively associated with a plurality of signal wires or pins otherwise supported by an insulating feedthrough and a ferrule. The resulting discrete device comprises a single-element device which is cheaper to make, and which reduces cross-talk between adjacent signal wires/pins while otherwise accommodating changes in feedthrough pitch without having to redesign the filter.
Claims36
A feedthrough filter arrangement for use with an AIMD, comprising:
- a ferrule;
- a feedthrough associated with said ferrule;
- a plurality of conductors supported through said feedthrough;
- and
- a corresponding plurality of discrete filters, each of said filters having at least two respective terminals, with one of said terminals associated with a respective one of said conductors, and the other of said terminals associated with said ferrule.
A feedthrough filter arrangement for use in association with external circuitry, comprising:
- a metal ferrule;
- an insulating feedthrough associated with said ferrule;
- a plurality of wire conductors supported through said feedthrough;
- and
- a corresponding plurality of discrete cofired filter capacitors, each of said filter capacitors having:
- respective end terminals;
- a top side terminal;
- a bottom side terminal;
- a body of dielectric material;
- and
- two sets of interleaved vertical electrodes comprising ground electrodes and signal electrodes received in said body of dielectric material, wherein each of said ground electrodes has respective projecting end portions connecting with respective end terminals of each of said filter capacitors, and each of said signal electrodes has respective projecting side portions connecting with respective side terminals of each of said filter capacitors;
- wherein respective end terminals of each of said filter capacitors are mounted on opposite sides of said ferrule for a ground connection therewith, and with a bottom side terminal of each of said filter capacitors connected with a respective one of said conductors for a signal connection therewith, so that each of said top side terminals of said filter capacitors are exposed for respective connections with associated external circuitry.
Methodology for a feedthrough filter arrangement for use with an active implanted medical device (AIMD), comprising:
- providing a metal ferrule;
- fitting an insulating feedthrough with said ferrule;
- supporting a plurality of conductors through said feedthrough;
- and
- connecting respectively a corresponding plurality of discrete cofired filters with said plurality of conductors, so as to reduce cross-talk between signals on adjacent of said conductors.
Dependencies are inferred from the claim text.