Implantable medical device with a voltage protection circuit
First Claim
1. An implantable medical device comprising:
- a hermetically sealed housing configured for implantation in a subject;
an RF telemetry antenna carried by said housing;
an RF telemetry circuit comprising an RF transmitter and receiver connected to said RF antenna via a conductive path;
a control circuit connected to said RF telemetry circuit that operates said RF telemetry circuit to transmit and receive signals via said RF antenna;
at least one of said RF telemetry circuit and said control circuit comprising an electrical component that is susceptible to damage or operational modification due to interaction with a voltage pulse having a voltage amplitude; and
a feedthrough in said hermetically sealed housing for said conductive path, said feedthrough comprising a feedthrough housing and a capacitor element in said feedthrough housing, said capacitor element being connected in series with said RF telemetry circuit and said RF antenna, and said capacitor element comprising a first capacitor plate configuration connected in series with said RF antenna and a second capacitor plate configuration connected in series with said RF telemetry circuit, said capacitor element being dimensioned to block said voltage amplitude of said pulse.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device has a hermetically sealed housing with at least one feedthrough therein for a conductive path between an RF antenna carried by the housing, and an RF telemetry circuit contained in the housing. The feedthrough has a feedthrough housing with a capacitor element therein having first and second capacitor plate configurations, with a first of the capacitor plate configurations being connected to the RF antenna and a second of the capacitor plate configurations being connected to the RF telemetry circuit. The feedthrough functions both as a hermetic seal and as a galvanic isolation for voltage protection of the components of the RF telemetry circuit, and other circuitry in the sealed housing connected thereto.
13 Citations
11 Claims
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1. An implantable medical device comprising:
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a hermetically sealed housing configured for implantation in a subject; an RF telemetry antenna carried by said housing; an RF telemetry circuit comprising an RF transmitter and receiver connected to said RF antenna via a conductive path; a control circuit connected to said RF telemetry circuit that operates said RF telemetry circuit to transmit and receive signals via said RF antenna; at least one of said RF telemetry circuit and said control circuit comprising an electrical component that is susceptible to damage or operational modification due to interaction with a voltage pulse having a voltage amplitude; and a feedthrough in said hermetically sealed housing for said conductive path, said feedthrough comprising a feedthrough housing and a capacitor element in said feedthrough housing, said capacitor element being connected in series with said RF telemetry circuit and said RF antenna, and said capacitor element comprising a first capacitor plate configuration connected in series with said RF antenna and a second capacitor plate configuration connected in series with said RF telemetry circuit, said capacitor element being dimensioned to block said voltage amplitude of said pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification