Granted Patent
B2
US 12,646,652 · App. 18/058,184 · Granted Jun 2, 2026
Battery-optimized compensation system
Inventors:
Gur Oron (Tel Aviv, IL); Eran Benjamin (Tel Aviv, IL); Alexander Firtel (Ashdod, IL); Amiel Greenberg (Rehovot, IL); Yigal Elisha (Tel Aviv, IL)
Assignee:
BLUEWIND MEDICAL LTD.
View Patent ↗
Loading inventors, assignments & file history…
Abstract
A housing placeable against skin of a subject includes a transmitting coil. Battery-powered control circuitry including a power stage transmits power to an implant by activating the power stage to drive a current through the transmitting coil to induce an induced current in a receiving coil of the implant. A sensor indicates divergence of a real-time resonance frequency of the transmitting coil with respect to a reference resonance frequency of the transmitting coil at which (a) efficiency of the power stage is at least 70% of a maximum efficiency as a function of the resonance frequency, and (b) the current driven through the transmitting coil is less than 96% of a maximum current drivable through the transmitting coil as a function of the resonance frequency. The circuitry reduces the divergence by tuning the resonance frequency of the transmitting coil. Other applications are also described.
Claims (21)
1 . Apparatus for use with a medical implant that comprises a receiving coil, the apparatus comprising:
a housing configured to be placed against skin of a subject;
a transmitting coil disposed in the housing;
control circuitry comprising a power stage and configured to transmit power to the medical implant by activating the power stage to drive a current through the transmitting coil to induce an induced current in the receiving coil;
a battery coupled to the housing and configured to power the control circuitry;
a sensor configured to determine an indication of divergence of
(i) a real-time resonance frequency of the transmitting coil, with respect to
(ii) a reference resonance frequency of the transmitting coil at which:
(a) efficiency of the power stage is at least 70% of a maximum efficiency of the power stage as a function of the resonance frequency of the transmitting coil, the efficiency of the power stage defined as power output by the power stage divided by power input to the power stage, and
(b) the current driven through the transmitting coil is less than 96% of a maximum current drivable through the transmitting coil as a function of the resonance frequency of the transmitting coil; and
one or more electrical components, coupled to the control circuitry,
wherein the control circuitry is configured to receive an input from the sensor indicative of the divergence and use the one or more electrical components to reduce the divergence by tuning the resonance frequency of the transmitting coil in response to the determination of the sensor.
2 . The apparatus according to claim 1 , wherein the housing is a flexible housing.
3 . The apparatus according to claim 1 , wherein the transmitting coil is a flexible transmitting coil and wherein the real-time resonance frequency is a flexed resonance frequency when the transmitting coil is flexed.
4 . The apparatus according to claim 1 , wherein the control circuitry is configured to transmit power to the medical implant by activating the power stage to drive the current at a fixed frequency through the transmitting coil to induce the induced current in the receiving coil.
5 . The apparatus according to claim 4 , wherein the control circuitry is configured to transmit power to the medical implant by activating the power stage to drive the current at a fixed frequency of 6.78 MHz through the transmitting coil to induce the induced current in the receiving coil.
6 . The apparatus according to claim 1 , wherein the control circuitry is configured to transmit power to the medical implant by activating the power stage to drive the current within a set frequency band through the transmitting coil to induce the induced current in the receiving coil.
7 . The apparatus according to claim 6 , wherein the control circuitry is configured to transmit power to the medical implant by activating the power stage to drive the current within the set frequency band, wherein the set frequency band is a range of frequencies that includes 6.78 MHz within the range.
8 . The apparatus according to claim 1 , wherein the control circuitry is configured such that the reference resonance frequency of the transmitting coil is lower than a resonance frequency of the transmitting coil at which the efficiency of the power stage is the maximum efficiency.
9 . The apparatus according to claim 8 , wherein the control circuitry is configured such that the reference resonance frequency of the transmitting coil is a resonance frequency of the transmitting coil at which the efficiency of the power stage is less than 95% of the maximum efficiency.
10 . The apparatus according to claim 9 , wherein the control circuitry is configured such that the reference resonance frequency of the transmitting coil is a resonance frequency of the transmitting coil at which the efficiency of the power stage is at least 75% of the maximum efficiency.
Assignments (2)
SECURITY INTEREST
Recorded May 6, 2026
From: BLUEWIND MEDICAL LTD.; BLUEWIND MEDICAL INC.
To: CONVATEC INTERNATIONAL UK LIMITED
Reel/Frame 074577/0280 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Apr 24, 2024
From: ORON, GUR; BENJAMIN, ERAN; FIRTEL, ALEXANDER; GREENBERG, AMIEL; ELISHA, YIGAL
To: BLUEWIND MEDICAL LTD.
Reel/Frame 068323/0310 →
Continuity (2)
Provisional Application
63282758
· Nov 24, 2021
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