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Self-tuning external device for wirelessly recharging implantable medical devices

  • US 9,744,368 B2
  • Filed: 02/16/2012
  • Issued: 08/29/2017
  • Est. Priority Date: 02/16/2012
  • Status: Active Grant
First Claim
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1. A method of providing recharge energy from an external device to an implantable medical device where the external device emits the recharge energy from a coil of a tank circuit, comprising:

  • determining when current is changing direction within the tank circuit of the external device due to a resonance of the tank circuit; and

    driving current through the tank circuit in a first direction without changing the resonance of the tank circuit and based on the determination of when the current in the tank circuit is changing to the first direction due to the resonance of the tank circuit.

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