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Method and apparatus of acoustic communication for implantable medical device

  • US 8,165,677 B2
  • Filed: 02/03/2009
  • Issued: 04/24/2012
  • Est. Priority Date: 07/09/2004
  • Status: Active Grant
First Claim
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1. An implantable medical device adapted to be communicatively coupled to a second medical device, the implantable medical device comprising:

  • a cardiac rhythm management (CRM) device;

    an acoustic transducer configured to be an acoustic coupler for acoustic communication between the implantable medical device and the second medical device;

    an acoustic communication circuit coupled to the CRM device and the acoustic transducer and including;

    a data receiver circuit adapted to receive and demodulate an incoming acoustic signal and including an error detector, the incoming acoustic signal including a first carrier signal modulated by incoming data, the error detector adapted to detect an error rate of the demodulated incoming acoustic signal;

    a data transmitter circuit adapted to modulate and transmit an outgoing acoustic signal and including a variable-frequency waveform generator, the outgoing acoustic signal including a second carrier signal modulated by outgoing data, the variable-frequency waveform generator adapted to generate the second carrier signal with a programmable carrier frequency; and

    a frequency selection circuit adapted to adjust the carrier frequency using the error rate; and

    an implantable housing configured to contain the CRM device and the acoustic communication circuit,wherein the acoustic transducer is fastened to the implantable housing.

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