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：US20220029530A1

公开(公告)日：2022-01-27

申请号：US17296882

申请日：2020-03-26

Applicant: Google LLC

Inventor： Yiming Li ,  Shuo Wang ,  Honggang Sheng ,  Douglas Osterhout ,  Srikanth Lakshmikanthan

IPC: H02M1/44 ,  H02M3/335

Abstract: An example power adapter includes a rectifier configured to convert an input alternating current (AC) power signal on an AC bus into an input direct current (DC) power signal on an input DC bus; a split differential mode (DM) choke connected to the input DC bus, wherein the split DM choke comprises a first DM choke on a high side of the input DC bus and a second DM choke on a low side of the input DC bus; and a switched mode power converter configured to output, using the input DC power signal, an output DC power signal on an output DC bus.