Advanced Neuromodulation Systems, Inc.

Luis Ortiz Hernandez

Hongxuan Zhang

Li Sun

Daran DeShazo

William L Winstrom

Greg Creek

Seil Oh

Edward Lundberg

Santhosh Seetharaman

Nicholas Sachs

Steve Gray

A method of operation of a wireless charger device includes transmitting a wireless charging signal to a receiver device. The method further includes receiving a clamping pulse from the receiver device based on the wireless charging signal. The clamping pulse indicates a first value associated with a falling edge of the clamping pulse and further indicates a second value associated with a rising edge of the clamping pulse. The clamping pulse is detected based on a comparison of a first threshold with the first value and further based on a comparison of a second threshold with the second value, and the second threshold is different than the first threshold. The method further includes determining a charging state of the receiver device based on the clamping pulse.

Method for wireless charging and communication via clamping pulses

Embodiments provide methods of conducting operations with an implantable medical device (IMD) and an external controller device for performing authentication operations. In some embodiments, the method comprises: generating or storing an authentication data structure in the external controller device for over-the-air communication between the external device and the IMD, wherein the authentication data structure is generated by: (1) removing attribute fields from a first digital certificate and adding a public key of the external controller device to form an intermediate data structure; (2) creating a digital signature of the first intermediate data structure using a second digital certificate of an issuing certificate authority (CA); and (3) forming the authentication data structure by combining the intermediate data structure, the created digital signature, a public key of the issuing CA, and a digital signature of the public key of the issuing CA created using a third digital certificate of a root CA.

Compressed PKI methods for machine-to-machine authentication in bandwidth-constrained medical devices

A magnetic field sensor is positioned in proximity to a charging coil in an implantable medical device (IMD). An external device for charging the IMD includes a primary coil and a magnet positioned in proximity to the primary coil. The magnetic field sensor in the IMD detects a static magnetic field of the magnet and provides measurements proportional to the static magnetic field along three axes. These measurements of the static magnetic field are used to determine whether the external device is aligned with the IMD for charging. These measurements of the static magnetic field may also be processed to determine a position of the charger device relative to the IMD in three dimensions. When misaligned, a direction may be generated for a user to reposition the charger device to improve alignment.

System and method for alignment of a wireless charger to an implantable medical device

The present disclosure provides systems and methods for wirelessly charging an implantable medical device. An external charging device includes a coil, signal generating circuitry to drive current through the coil at a charging frequency to induce current in a second coil in the implantable medical device, monitoring circuitry to generate an output signal to monitor charging operations, and a comb filter. The comb filter is configured to apply filtering to the output signal to remove noise from the output signal, wherein the filtering is applied based on the charging frequency. The external charging device is configured to process the filtered output signal to detect a circuit state of charging circuitry of the implantable medical device during charging operations, and the external charging device is configured to vary the charging frequency based, in part, on detection of the circuit state of the charging circuitry of the implantable medical device.

Systems and methods for noise filtering in implantable medical device charging systems

A wireless charger device is configured to charge an implantable medical device (IMD). A patient controller obtains one or more power parameters from the charger device during charging of the IMD. The patient controller estimates a temperature range of the IMD using the one or more power parameters from the charger device and compares to a heating threshold. The patient controller then determines whether one or more spacers are recommended in response to the comparison. The one or more spacers are removably attached to the wireless charger device and are configured to lay in a position between the wireless charger device and a patient's skin to increase a charging path.

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Plano, TX, United States of America

Luis Ortiz Hernandez