US 12,191,677 B2
Structures for in-band communications in wireless charging
Zhijun Luo, Shanghai (CN); and Ikgyoo Song, Suwon-si (KR)
Assigned to NuVolta Technologies (Hefei) Co., Ltd., Hefei (CN)
Filed by NuVolta Technologies (Hefei) Co., Ltd., Hefei (CN)
Filed on Apr. 10, 2023, as Appl. No. 18/132,784.
Claims priority of application No. 202211449401.6 (CN), filed on Nov. 18, 2022.
Prior Publication US 2024/0171010 A1, May 23, 2024
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02J 7/00 (2006.01); H02J 7/02 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/80 (2016.02); H02J 7/007 (2013.01); H02J 7/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for wireless power reception comprising:
a rectifier configured to convert an alternating current voltage into a direct current voltage for a load coupled to the apparatus;
a receiver coil and a resonant capacitor connected in series between two inputs of the rectifier;
a first capacitor and a first switch connected in series to form a first capacitor-switch network connected in parallel with the resonant capacitor, wherein the first switch is configured to function as a resistor, and a resistance value of the resistor is adjustable by controlling a gate drive voltage applied to the first switch; and
a second capacitor and a second switch connected in series to form a second capacitor-switch network connected in parallel with the resonant capacitor, the first switch and the second switch configured to provide a plurality of impedances coupled to the receiver coil, wherein the plurality of impedances includes at least a first impedance associated with a High state of an Amplitude Shift Keying (ASK) modulation used by the apparatus, and a second impedance associated with a Low state of the ASK modulation.