Implantable medical device with improved EMI filter

Details Implantable medical device with improved EMI filter Implantable medical device with improved EMI filter

2006-10-20

2009-11-17

Layno, Carl H (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S004000, C607S005000, C607S036000, C128S901000

Reexamination Certificate

active

07620453

ABSTRACT:
An electromagnetic interference (EMI) filter is provided to attenuate potentially damaging high frequency electromagnetic interference from interfering with the operation of a hermetically sealed implantable medical device. In one embodiment, the EMI filter is joined to a bypass unit that is configured to provide an energy path for the delivery of an energy pulse. The bypass unit, in one embodiment, may include a non-linear device in parallel with an impedance component. The non-linear device can be a DIAC, a MOSFET, or any other non-linear semiconductor array. The EMI filter may be located within the header assembly, the feedthrough assembly, or located proximate to a pulse generator along the energy delivery path.

REFERENCES:
patent: 5690683 (1997-11-01), Haefner et al.
patent: 5817130 (1998-10-01), Cox et al.
patent: 2005/0197677 (2005-09-01), Stevenson
Dictionary.com. “attenuate” definition. Jul. 6, 2009 <http://dictionary.reference.com/browse/attenuate>.

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