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Enhanced transcutaneous recharging system for battery powered implantable medical device

  • US 5,702,431 A
  • Filed: 09/17/1996
  • Issued: 12/30/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A transcutaneous energy transmission system for transmitting electrical energy from an external charging device to an implantable medical device for providing power to said implantable medical device to charge a battery in said implantable medical device, said transcutaneous energy transfer system comprising:

  • an external charging device containing;

    a primary coil in said external charger for transmitting said power transcutaneously to said medical implantable device;

    a capacitor in said external charger coupled to said primary coil, said primary coil and said capacitor forming a resonant circuit;

    a controller for controlling the power provided to said resonant circuit;

    an implantable medical device containing;

    a secondary coil in said implantable medical device;

    a first capacitor connected in series to a first switch, the combination of the first capacitor and first switch connected in parallel across said secondary coil;

    a second capacitor connected to said secondary coil;

    a second switch connected in parallel across said second capacitor,and a battery wherein the battery connects to said second capacitor and said second switch.

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