Feed-through filter assembly having varistor and capacitor struc

Details Feed-through filter assembly having varistor and capacitor struc Feed-through filter assembly having varistor and capacitor struc

1998-06-24

1999-12-07

Reichard, Dean A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

361309, 361303, 338 20, H01G 435, H01C 710

Patent

active

059993987

ABSTRACT:
A feed-through filter assembly such as may be used in an implantable medical device. The assembly includes a conductive mounting element which may be hermetically sealed to an outer housing of the implantable medical device. In many embodiments, the conductive mounting element will be a conductive canister in which a feed-through filter structure is located. Alternatively, the conductive mounting element may include a suitable subplate structure. Because the filter structure exhibits both varistor and capacitive characteristics, effective transient suppression and interference filtering is achieved in a single package. Secondary filtering may be provided downstream of the filter assembly for additional interference filtering at lower frequencies.

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"EMI Filtering in Medical Implantables" by Steve Makl, Medical Device & Diagnostic Industry, dated Sep., 1994.
Brochure entitled "TransGuard --Multi-Layer-Ceramic Transient Voltage Suppressors," by AVX Corporation, Aug. 1994.

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