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Charger alignment indicator with adjustable threshold

  • US 7,932,696 B2
  • Filed: 05/14/2007
  • Issued: 04/26/2011
  • Est. Priority Date: 05/14/2007
  • Status: Active Grant
First Claim
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1. An external charger for an implantable medical device, comprising:

  • a source of electrical power;

    an alternating current (AC) coil configured for transcutaneously conveying electrical energy from the electrical power source to charge the implanted medical device;

    a charge strength indicator configured for generating a user-discernible signal at a threshold;

    a detector configured for detecting an electrical parameter during a series of discrete time periods; and

    a processor configured for adjusting the threshold based on the detected electrical parameter during the series of discrete time periods.

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