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Automatic on-off charger for an implantable medical device

  • US 9,586,054 B2
  • Filed: 10/12/2015
  • Issued: 03/07/2017
  • Est. Priority Date: 01/16/2012
  • Status: Active Grant
First Claim
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1. An external charger for charging a battery in an implantable medical device, comprising:

  • a coil; and

    control circuitry configured to automatically energize the coil to generate a charging field without initiation by a user, wherein the control circuitry comprises circuitry to;

    periodically energize the coil to generate a first field;

    evaluate a voltage across the coil or a current through the coil to determine if the external charger is possibly proximate to the implantable medical device during the generation of the first field; and

    energize the coil to generate the charging field when it is determined that the external charger is possibly proximate to the implantable medical device.

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