公开(公告)号：US20170187355A1

公开(公告)日：2017-06-29

申请号：US14757914

申请日：2015-12-24

Applicant: Intel Corporation

Inventor： Songnan Yang ,  Bin Xiao ,  Jian Chen ,  Sreenivas Kasturi ,  Jordan E. Maslov

IPC: H03J7/04 ,  H03H7/40 ,  H02J7/02

CPC classification number: H03J7/04 ,  H02J7/025 ,  H02J50/12 ,  H03F1/565 ,  H03F3/2176 ,  H03F3/245 ,  H03F2200/387 ,  H03F2200/435 ,  H03H7/40 ,  H03L7/1972 ,  H03L7/22 ,  H03L2207/50

Abstract: Techniques for tuning in a wireless power transmitter in a system, method, and apparatus are described herein. An example of a wireless power transmitter may include a transmitter coil configured to generate a magnetic field for wirelessly charging a battery, and a tuning circuit coupled to the transmitter coil configured to retune the transmitter coil in response to a reactance shift of the transmitter coil. The wireless power transmitter may also include a tuning control circuit to detect the reactance shift and control the tuning circuit to retune the transmitter coil. The tuning control circuit is to detect the reactance by measuring a drain voltage of a power amplifier.