Passive wireless multi-channel implantable device

Patent metadata

Field	Value
Publication number	US-2023414954-A1
Application number	US-202318342688-A
Country	US
Kind code	A1
Filing date	Jun 27, 2023
Priority date	Jun 28, 2022
Publication date	Dec 28, 2023
Grant date	—

Abstract

A wireless multi-channel implantable device. In some embodiments, the system includes: a wireless reception element, for receiving power wirelessly through tissue of a subject; a power management and storage circuit, for storing a portion of the received power; and a control circuit for controlling the delivery of current from the power management and storage circuit to each of a plurality of stimulation electrodes individually, based on a modulation of the received power.

First claim

What is claimed is:

1 . A system, comprising:
a wireless reception element, for receiving power wirelessly through tissue of a subject; a power management and storage circuit, for storing a portion of the received power; and a control circuit for controlling the delivery of current from the power management and storage circuit to each of a plurality of stimulation electrodes individually, based on a modulation of the received power.

2 . The system of claim 1 , wherein the wireless reception element is an antenna.

3 . The system of claim 1 , wherein the control circuit is configured:
to receive a first pulse having a first pulse width and a second pulse having a second pulse width, different from the first pulse width, to convert the first pulse to a first binary value; and to convert the second pulse to a second binary value different from the first binary value.

4 . The system of claim 3 , comprising a rectifier for rectifying an alternating current (AC) signal received from the wireless reception element.

5 . The system of claim 4 , wherein the control circuit comprises a passive demodulator circuit for converting the first pulse and the second pulse to the first binary value and the second binary value, respectively.

6 . The system of claim 5 , wherein the passive demodulator circuit comprises a low-pass filter.

7 . The system of claim 6 , wherein the low-pass filter is a resistor-capacitor (RC) low-pass filter.

8 . The system of claim 3 , wherein the control circuit comprises a shift register, configured:
to receive the first binary value and the second binary value; to output the first binary value at a first parallel output of the shift register; and to output the second binary value at a second parallel output of the shift register.

9 . The system of claim 8 , comprising a rectifier for rectifying an alternating current (AC) signal received from the wireless reception element,
wherein:
the control circuit comprises a rectifier for rectifying an alternating current (AC) signal received from the wireless reception element; and
the shift register has a clock input, connected to the rectifier.

10 . The system of claim 9 , wherein the clock input is connected to the rectifier through an inverter.

11 . The system of claim 10 , wherein:
the first parallel output of the shift register is connected to a first stimulation electrode of the plurality of stimulation electrodes, and the second parallel output of the shift register is connected to a second stimulation electrode of the plurality of stimulation electrodes.

12 . The system of claim 11 , wherein the first parallel output of the shift register is connected to the first stimulation electrode of the plurality of stimulation electrodes through a switch, the switch being configured to selectively route current from the power management and storage circuit to the first stimulation electrode, in accordance with a control signal received from the first parallel output of the shift register.

13 . The system of claim 12 , wherein the first parallel output of the shift register is connected to the switch through a low-pass filter.

14 . The system of claim 1 , wherein the power management and storage circuit comprises a first capacitor for supplying the current for the stimulation electrodes.

15 . The system of claim 14 , wherein the power management and storage circuit comprises a direct current to direct current (DC-DC) converter, configured to charge the first capacitor.

16 . The system of claim 15 , wherein the control circuit comprises a shift register, configured to be powered by the DC-DC converter and the first capacitor.

17 . The system of claim 16 , further comprising a rectifier and a data slicer, wherein:
the control circuit comprises a passive demodulator circuit; the rectifier is connected to the wireless reception element; and the data slicer has an input connected to the rectifier, an output connected to the passive demodulator circuit, and a power supply connection connected to the first capacitor.

18 . The system of claim 17 , comprising a dielectric or semiconductor substrate supporting the power management and storage circuit and the control circuit, the substrate, the power management and storage circuit and the control circuit together occupying a volume of less than 1,000 cubic millimeters.

19 . The system of claim 18 , wherein the substrate is substantially flat, and has a thickness of less than 4 mm.

20 . A system, comprising:
a wireless reception element, for receiving power wirelessly through tissue of a subject; and a shift register, the shift register being configured:
to be powered by the wirelessly received power;
to have stored in it a data word received as a modulation of the wirelessly received power; and
to control delivery of current to a stimulation electrode, of a plurality of stimulation electrodes, based on a bit of the data word.

Assignees

• Blain Christen Jennifer
• Liu Shiyi
• Benbuk Ahmed Abed
• Gulick Daniel
• Univ Arizona State

Inventors

• Blain Christen Jennifer
• Liu Shiyi
• Benbuk Ahmed Abed
• Gulick Daniel

Classifications

• A61N1/36125

  Details of circuitry or electric components · CPC title

• A61N1/3787 Primary

  from an external energy source · CPC title

• H02J50/20

  using microwaves or radio frequency waves · CPC title