公开(公告)号：US20250118998A1

公开(公告)日：2025-04-10

申请号：US18909702

申请日：2024-10-08

Applicant: Google LLC

Inventor： Zhenxue Xu ,  Shuo Wang ,  Liang Jia ,  Srikanth Lakshmikanthan ,  Yirui Yang

IPC: H02J50/80 ,  H02J50/12

Abstract: An electronic device includes a wireless charging receive coil configured to transduce, into an alternating current (AC) power signal, a magnetic field generated by a wireless charging transmit coil of an external device; an active rectifier configured to convert the AC signal received at an AC side of the active rectifier into a direct current (DC) power signal output at a DC side of the active rectifier, the active rectifier comprising a plurality of switches; a first modulation capacitor connected to an upper rail of the AC side; a second modulation capacitor connected to a lower rail of the AC side; and a controller configured to adjust an impedance of the computing device to communicate with the external device by at least controlling the plurality of switches to cause the first modulation capacitor and the second modulation capacitor to charge during separate time periods.

公开(公告)号：US20240371565A1

公开(公告)日：2024-11-07

申请号：US18742738

申请日：2024-06-13

Applicant: Google LLC

Inventor： Li Wang ,  Liyu Yang ,  Stefano Saggini ,  Liang Jia ,  Yanchao Li ,  Zhenxue Xu ,  Haoquan Zhang ,  Mauricio Antonio Alvarado Ortega ,  Giulia Segatti ,  Pingsheng Wu ,  Srikanth Lakshmikanthan ,  Qi Tian ,  Veera Venkata Siva Nagesh Polu ,  Yung-Chih Chen ,  Yi Lin Chen ,  Wei Chen Tu

IPC: H01F27/28 ,  H01F27/29 ,  H02J50/10

Abstract: A wireless charging receiver that includes a first coil, a second coil, and a nanocrystalline sheet is disclosed. The first coil is configured to be located within a recess in the nanocrystalline sheet and is positioned between the second coil and the nanocrystalline sheet. The first coil includes first and second terminals and the second coil includes third and fourth terminals. The first terminal is connected to the third terminal and the second terminal is connected to the fourth terminal to electrically connect the first coil to the second coil. The first coil may be formed of a flexible printed circuit board having a continuous trace or may be formed of litz wire. The first coil may be a hybrid coil with a first portion formed of a flexible printed circuit board having a continuous trace and with a second portion formed of litz wire.