公开(公告)号：US20170256956A1

公开(公告)日：2017-09-07

申请号：US15061585

申请日：2016-03-04

Applicant: QUALCOMM Incorporated

Inventor： Linda Stacey IRISH ,  William Henry VON NOVAK, III ,  Arvind GOVINDARAJ ,  Khoi NGUYEN

IPC: H02J5/00 ,  H02J7/02 ,  H02M7/217

CPC classification number: H02J5/00 ,  H02J7/025 ,  H02J50/10 ,  H02J50/12 ,  H02M7/217 ,  H02M2007/2195 ,  Y02B70/1408

Abstract: A multi-level rectifier is presented that is suitable for use at high frequencies, including into MHz range such as in the 6.78 MHz band used for wireless power transfer. Depending on the amplitude of the input waveform, the rectifier can be operated in different modes. For lower input levels, the rectifier acts as a voltage doubler. For higher input levels, the impedance of the rectifier can be varied based on the input level. The rectifier is a synchronous rectifier with a front section and a back section, where the impedance is varied by changing the phase of the control signal of the back section relative to that of the front section.