Medical implant having closed loop transcutaneous energy transfer (TET) power transfer regulation circuitry

  • US 20050288739A1
  • Filed: 06/24/2004
  • Published: 12/29/2005
  • Est. Priority Date: 06/24/2004
  • Status: Active Application
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First Claim
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1. An implantable medical device receiving a transcutaneous energy transfer (TET) signal from a primary circuit at a resonance frequency, the implantable medical device comprising:

  • an active load requiring a supply power;

    a secondary coil coupled to capacitance selected to form a resonant tank circuit responsive to the TET signal to produce a received signal;

    a rectifier converting the received signal into a supply power for the active load;

    detuning circuitry; and

    power control circuitry responsive to a sensed value of the supply power to selectively switch the detuning circuit into electrical communication with the secondary coil to reduce a power transfer characteristic of the received signal.

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