SHIELDED THREE-TERMINAL FLAT-THROUGH EMI/ENERGY DISSIPATING FILTER
First Claim
1. An EMI/energy dissipating filter for an active implantable medical device (AIMD), comprising:
- an electromagnetically shielded conductive housing for the AIMD;
a hermetic terminal assembly for passage of at least one conductor through the AIMD housing in non-conductive relation therewith;
at least one active electronic circuit disposed within the AIMD housing; and
a shielded three-terminal flat-through EMI/energy dissipating filter conductively coupled between the conductor and the active electronic circuit, comprising;
an active electrode plate through which a circuit current passes between a first terminal and a second terminal;
a first shield plate on a first side of the active electrode plate; and
a second shield plate on a second side of the active electrode plate opposite the first shield plate;
wherein the first and second shield plates are conductively coupled to a grounded third terminal;
wherein the active electrode plate is insulated from the shield plates by a dielectric material such that the active electrode plate and the shield plates cooperatively form a flat-through capacitor; and
wherein the surface area of the active electrode plate is maximized to increase parasitic capacitance and minimize resistance to current flow.
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Accused Products
Abstract
A shielded three-terminal flat-through EMI/energy dissipating filter includes an active electrode plate through which a circuit current passes between a first terminal and a second terminal, a first shield plate on a first side of the active electrode plate, and a second shield plate on a second side of the active electrode plate opposite the first shield plate. The first and second shield plates are conductively coupled to a grounded third terminal. In preferred embodiments, the active electrode plate and the shield plates are at least partially disposed with a hybrid flat-through substrate that may include a flex cable section, a rigid cable section, or both.
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Citations
20 Claims
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1. An EMI/energy dissipating filter for an active implantable medical device (AIMD), comprising:
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an electromagnetically shielded conductive housing for the AIMD; a hermetic terminal assembly for passage of at least one conductor through the AIMD housing in non-conductive relation therewith; at least one active electronic circuit disposed within the AIMD housing; and a shielded three-terminal flat-through EMI/energy dissipating filter conductively coupled between the conductor and the active electronic circuit, comprising; an active electrode plate through which a circuit current passes between a first terminal and a second terminal; a first shield plate on a first side of the active electrode plate; and a second shield plate on a second side of the active electrode plate opposite the first shield plate; wherein the first and second shield plates are conductively coupled to a grounded third terminal; wherein the active electrode plate is insulated from the shield plates by a dielectric material such that the active electrode plate and the shield plates cooperatively form a flat-through capacitor; and wherein the surface area of the active electrode plate is maximized to increase parasitic capacitance and minimize resistance to current flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification