Verily Life Sciences LLC

Arvind Govindaraj

Peng Cong

James Christian Salvia

Damiano Patron

David Lari

Cindy Au

Michael Caruso

Adam Bildersee

Nehal Patel

A system for wirelessly charging an implantable device is described. The system may include an estimation device or component that estimates a field strength at a receiving coil of the implantable device based on available electrical signals within the implantable device. The system may also include a control system for varying a strength of a charging field produced by a charger. The system may also be used to align a wireless charger with the implantable device for charging a battery of the implantable device. Methods and devices for implementing the charging system are also described.

Control system for wireless power charging and alignment

One example device includes a first housing portion defining a first coupling surface; a second housing portion defining a second coupling surface, the first housing portion coupled to the second housing portion to form a housing, the first housing portion and the second housing portion defining an opening, the opening intersecting the first coupling surface and the second coupling surface; a first gasket positioned between the first coupling surface and the second coupling surface, the first gasket providing a first seal between the first housing portion and the second housing portion, a printed circuit board ('PCB') disposed within the housing and coupled to at least one of the first or second housing portions; an electrical connector electrically coupled to the printed circuit board and positioned within the opening; and a second gasket positioned between the electrical connector and the housing, the second gasket providing a second seal between the electrical connector and the housing, wherein the first gasket is positioned to abut the second gasket and wherein compression of the first gasket between the first and second housing portions provides a third seal between the first gasket and the second gasket. Another example device includes a wireless field driver comprising a first antenna coil and an electrical current source electrically coupled to the first antenna coil; an electromagnetic field (“EMF”) sensor comprising a second antenna coil, wherein the EMF sensor is configured to generate a sensor signal indicative of a signal strength from the first antenna coil; a non-transitory computer-readable medium; and a processor in communication with the non-transitory computer-readable medium, the processor configured to execute processor-executable instructions stored in the non-transitory computer-readable medium to: cause the electrical current source to output a current to the first antenna coil to generate a first EMF; estimate the signal strength of the first EMF based on the sensor signal; and adjust the current to the first antenna coil based on an estimated signal strength of the first EMF to maintain a power characteristic and generate a second EMF at the first antenna coil.

Systems and methods for sealing and providing wireless power to wearable or implantable devices

Described herein are techniques to ensure a user using an external device is authorized to connect and connecting to a correct implantable medical device using a wireless communication protocol. A request for authorization is sent to the external device from the implantable medical device, and the authorization can be provided by an authorization pulse sent using the implantable medical device charger over the inductive link between the charging device and the implanted device. The authorization pulse can be trusted because the inductive link is short range, ensuring the patient is aware of the connection to the implanted device. Once the implanted device receives the authorization pulse, it may finalize the pairing over the first connection.

Authorizing programming of an implanted device using second factor

A wireless power system for an implantable device is described. The system includes multiple inductive charging coils to increase an effective area for receiving an electromagnetic charging field from a wireless charging device. The multiple inductive charging coils produce different alternating current signals in response to receiving the electromagnetic charging field. The system includes a rectifying circuit for rectifying the alternating current signals into direct current signals. The system also includes a current combination circuit for combining the multiple direct current signals into a single direct current for powering an operation of the implantable device. Methods and devices for implementing the power system in an implantable device are also described.

Multi-coil wireless power system

One example device for overcurrent protection for wireless power receivers includes a wireless power antenna comprising a wire coil; a conditioning circuit electrically coupled to the wireless power antenna to receive an electric power signal from the wireless power antenna; a temperature-sensitive fuse electrically coupled between the wireless power antenna and the conditioning circuit and configured to electrically decouple the wireless power antenna from the conditioning circuit in response to being blown; and a thermal energy source configured to generate thermal energy based on an electrical signal from an output of the conditioning circuit, the thermal energy source positioned proximate the temperature-sensitive fuse.

Systems and methods for overcurrent protection for wireless power receivers

One example device for providing wireless power includes a power supply; a power amplifier coupled to the power supply, the power amplifier comprising a first switch and a second switch coupled to the power supply and to a common switch output, and a pulse-width modulator ('PWM') coupled to the power amplifier, the PWM configured to substantially simultaneously toggle each of the first and second switches between open and closed states, and to maintain the first and second switches in opposite open and closed states; a controller coupled to the power supply and the PWM, the controller configured to: receive a sensor signal indicating an impedance of a load; determine a duty cycle of the PWM based on the sensor signal; and adjust an output voltage of the power supply based on the duty cycle of the PWM.

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San Bruno, CA, United States of America

Arvind Govindaraj