公开(公告)号：US20240006918A1

公开(公告)日：2024-01-04

申请号：US17853575

申请日：2022-06-29

Applicant: Halo Microelectronics International

Inventor： Rui Liu ,  Lijie Zhao ,  Feng Zhou

IPC: H02J50/12 ,  H04B5/00 ,  H02M1/00 ,  H04L27/04

CPC classification number: H02J50/12 ,  H04B5/0037 ,  H04L27/04 ,  H02M1/0025 ,  H04B5/0075

Abstract: In an embodiment method, an envelope voltage of a resonant capacitor of a wireless power receiver in a wireless charging system may be detected at an output node. One or more parameters of the wireless power receiver may be adjusted in order keep the envelope voltage within a pre-determined voltage range. The one or more parameters includes a capacitance across a receiving coil and the resonant capacitor, or a current of a sub-circuit connected between the output node and a ground. An amplitude shift keying (ASK) carrier signal may be detected at a wireless power transmitter of the wireless charging system and attenuated. A demodulated ASK signal may be generated from the attenuated ASK carrier signal based on peak values of the attenuated ASK carrier signal and a zero-crossing signal generated from the attenuated ASK carrier signal.