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Implantable electronic stimulator having isolation transformer input to telemetry circuits

  • US 6,505,072 B1
  • Filed: 11/16/2000
  • Issued: 01/07/2003
  • Est. Priority Date: 11/16/2000
  • Status: Active Grant
First Claim
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1. An implantable medical device comprising:

  • (a) a moisture impervious, body compatible, metal housing containing a therapy delivery circuit, a telemetry transmitter and a telemetry receiver;

    (b) an electrically non-conductive header affixed to the metal housing and supporting a magnetic or electromagnetic field energized coil/antenna;

    (c) at least one hermetically sealed feed-through pin extending from the header into the metal housing and connected to the coil/antenna; and

    (d) an isolation transformer contained within the housing and having a primary winding and a first secondary winding, with at least one terminal of the primary winding being coupled to the at least one feed-through pin and the first secondary winding coupled in circuit with at least one of the telemetry transmitter and telemetry receiver to permit signal flow between the at least one telemetry transmitter or the telemetry receiver and the coil/antenna, the isolation transformer electrically isolating the at least one telemetry transmitter and telemetry receiver from voltages impressed on the housing by the therapy delivery circuit.

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