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Apparatus for high speed data communication between an external medical device and an implantable medical device

  • US 5,383,912 A
  • Filed: 05/05/1993
  • Issued: 01/24/1995
  • Est. Priority Date: 05/05/1993
  • Status: Expired due to Term
First Claim
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1. A method of bi-directionally and simultaneously communicating data between an external device and an implantable medical device, comprising the steps of:

  • generating a first plurality of time delay intervals each having a length representative of a corresponding data value to be communicated from the external device to the implantable medical device;

    generating a second plurality of time delay intervals each having a length representative of a corresponding data value to be communicated from the implantable medical device to the external device;

    transmitting a first train of pulses of electromagnetic energy from the external device to the implantable medical device by transmitting each, except the first, pulse of said first train of pulses after a respective time delay interval following transmission of an immediately preceding pulse of said first train of pulses, the respective time delay interval being a respective one of said first plurality of time delay intervals;

    receiving in the implantable medical device the first train of pulses of electromagnetic energy;

    transmitting a second train of pulses of electromagnetic energy from the implantable medical device to the external device by transmitting each pulse of said second train of pulses after a respective time delay interval following receipt of an immediately preceding pulse of said first train of pulses, the respective time delay interval being a respective one of said second plurality of time delay intervals; and

    receiving in the external device the second train of pulses of electromagnetic energy.

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