Voltage Protection Circuits For Implantable Medical Devices
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device has an electronic circuit and a telemetry circuit both connected to a common ground, and at least one RF telemetry antenna that is formed by a number of parts of the implantable device that are capable of functioning as an antenna. When implanted, these parts are in contact with tissue. For voltage protection, the RF antenna circuit is connected to the parts of the RF telemetry antenna via at least one capacitor. The capacitor is dimensioned to withstand a voltage amplitude of a pulse that would be capable of modifying the state of, or destroying, any component in the RF telemetry circuit or the electronic circuit.
14 Citations
29 Claims
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1-14. -14. (canceled)
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15. An implantable medical device comprising:
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at least one electronic circuit having a connection to a common ground; at least one RF telemetry circuit having a connection to said common ground; at least one RF telemetry antenna configured to be in contact with tissue when said medical device is implanted, said at least one RF telemetry antenna comprising a plurality of device parts capable of functioning as an antenna, each of said parts being configured to be in contact with tissue when said medical device is implanted; and each of said parts of said at least one RF telemetry antenna that is capable of functioning as an antenna being connected to said RF telemetry circuit via at least one capacitor, said capacitor being dimensioned to withstand a voltage amplitude of a pulse that is capable of modifying a state of, or destroying, any component in said electronic circuit or said RF telemetry circuit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29)
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27. An implantable medical device as claimed in 15 wherein said at least one RF telemetry antenna is configured for communication in at least two predetermined frequency bands, and wherein said device comprises a housing and wherein said at least one capacitor is connected to said housing and to said common ground and is connected to be self-resonant at a first of said frequency bands.
Specification