RECTIFYING-AND-MODULATING CIRCUIT AND WIRELESS POWER RECEIVER INCORPORATING THE SAME

摘要

A wireless power receiver includes a power receiving circuit wirelessly receiving power transmitted from a wireless power transmitter so as to generate an induced current, and a rectifying-and-modulating circuit including first to eighth switches and a control unit. The control unit is operable to control operation of each of the first to eighth switches between conduction and non-conduction. Accordingly, the first to fourth switches cooperatively constitute a full-bridge rectifier for rectifying the induced current generated by the power receiving circuit, and each of the fifth to eighth switches is operable to switch synchronously with a respective one of the first to fourth switches or to became non-conducting, thereby changing an amplitude of the induced current.

主权项

1. A wireless power receiver comprising:
a power receiving circuit having first and second terminals, and being configured to wirelessly receive power transmitted from a wireless power transmitter so as to generate an induced current flowing through said first and second terminals; and a rectifying-and-modulating circuit including
a series connection of first and second switches, a first common node between said first and second switches being coupled to said first terminal of said power receiving unit,a series connection of third and fourth switches coupled to the series connection of said first and second switches in parallel, a second common node between said third and fourth switches being coupled to said second terminal of said power receiving unit,fifth to eighth switches each coupled to a respective one of said first to fourth switches in parallel, anda control unit coupled to said first to eighth switches, said control unit being operable to control operation of each of said first to eighth switches between conduction and non-conduction so that said first to fourth switches cooperatively constitute a full-bridge rectifier for rectifying the induced current generated by said power receiving circuit and so that each of said fifth to eighth switches is operable to switch synchronously with the respective one of said first to fourth switches or to become non-conducting, thereby changing an amplitude of the induced current.