US 11,923,700 B2
Magnetic field cancellation circuitry
Oliver John Ridler, Cherrybrook (AU)
Assigned to Cochlear Limited, Macquarie University (AU)
Appl. No. 17/757,025
Filed by Cochlear Limited, Macquarie University (AU)
PCT Filed Dec. 7, 2020, PCT No. PCT/IB2020/061597
§ 371(c)(1), (2) Date Jun. 8, 2022,
PCT Pub. No. WO2021/140377, PCT Pub. Date Jul. 15, 2021.
Claims priority of provisional application 62/958,151, filed on Jan. 7, 2020.
Prior Publication US 2023/0012729 A1, Jan. 19, 2023
Int. Cl. H02J 50/70 (2016.01); A61N 1/08 (2006.01); A61N 1/36 (2006.01); H02J 50/10 (2016.01); H04B 5/00 (2006.01)
CPC H02J 50/70 (2016.02) [A61N 1/08 (2013.01); A61N 1/36038 (2017.08); H02J 50/10 (2016.02); H04B 5/0037 (2013.01); H04B 5/0081 (2013.01); H02J 2310/23 (2020.01)] 22 Claims
OG exemplary drawing
 
1. An apparatus comprising:
at least one first circuit configured to generate a first time-varying magnetic field for magnetic induction power transfer to a device;
at least one second circuit configured to generate and/or receive a second time-varying magnetic field for magnetic induction data transfer to and/or from the device;
at least one third circuit configured to generate a third time-varying magnetic field in response to a time-varying electric current, the third time-varying magnetic field configured to at least partially inhibit degradation of said data transfer from the first time-varying magnetic field; and
at least one fourth circuit configured to generate the time-varying electric current in response to a received portion of the first time-varying magnetic field or in response to a signal indicative of the first time-varying magnetic field.