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Implantable head located radiofrequency coupled neurostimulation system for head pain

  • US 9,498,636 B2
  • Filed: 01/07/2016
  • Issued: 11/22/2016
  • Est. Priority Date: 10/23/2013
  • Status: Active Grant
First Claim
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1. A method for controlling power delivery from an external power transfer system (EPTS) to at least one implantable neurostimulation system (INS), said method comprising:

  • driving a first transmit coil within the EPTS with a resonant current having a peak magnitude, using a transmit coil driver circuit within the EPTS;

    receiving, using a receive coil within a first INS tuned to the resonant frequency of the first transmit coil, power transferred from the first transmit coil;

    coupling the received power to a current regulator circuit within the first INS which requires a resonant current above a certain level to maintain current regulation and is configured to provide an electrode current to an electrode driver circuit within the first INS for a plurality of electrodes therewithin;

    monitoring the current regulator circuit within the first INS to determine whether the received power coupled thereto is sufficient to achieve and maintain current regulation of the current regulator circuit within the first INS;

    communicating a message to the EPTS using a back telemetry transmit circuit within the first INS, said message requesting a change in power transfer from the EPTS based upon said current regulator circuit determination;

    receiving, using a back telemetry receive circuit within the EPTS, the message communicated by the first INS; and

    adjusting the transmit coil driver circuit within the EPTS to change the peak magnitude of the resonant current, corresponding to the requested change in power transfer.

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