公开(公告)号：US11476721B2

公开(公告)日：2022-10-18

申请号：US17142953

申请日：2021-01-06

Applicant: MediaTek Inc.

Inventor： Vladimir Alexander Muratov ,  Patrick Stanley Riehl ,  William Plumb

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/10 ,  H02J7/02

Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.

公开(公告)号：US20210242724A1

公开(公告)日：2021-08-05

申请号：US17142953

申请日：2021-01-06

Applicant: MediaTek Inc.

Inventor： Vladimir Alexander Muratov ,  Patrick Stanley Riehl ,  William Plumb

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/10

Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.

公开(公告)号：US10916972B2

公开(公告)日：2021-02-09

申请号：US16228556

申请日：2018-12-20

Applicant: MediaTek Inc.

Inventor： Vladimir A. Muratov ,  Patrick Stanley Riehl ,  William Plumb

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/10 ,  H02J7/02

Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.

公开(公告)号：US10291127B2

公开(公告)日：2019-05-14

申请号：US15007819

申请日：2016-01-27

Applicant: MediaTek Inc.

Inventor： Hasnain Akram ,  Patrick Stanley Riehl

IPC: H02M3/158 ,  H02M3/335 ,  H02M1/00

Abstract: Methods and circuits for controlling a synchronous rectifier. An operating condition of the synchronous rectifier is detected. A voltage level applied to turn on at least one transistor of the synchronous rectifier us modified based upon the detected operating condition, to improve efficiency of the synchronous rectifier.