公开(公告)号：US20200381993A1

公开(公告)日：2020-12-03

申请号：US16426494

申请日：2019-05-30

Applicant: QUALCOMM Incorporated

Inventor： Linfei GUO ,  Chengwu TAO ,  Joseph DUNCAN ,  Xiaocheng JING ,  Amir PARAYANDEH ,  Justin PHILPOTT

IPC: H02M3/04 ,  H02M1/00

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for operating a switched-mode power supply (SMPS). One example method generally includes comparing a signal representative of an amount of current across an inductive element of the SMPS with at least three thresholds, selecting a configuration of the SMPS based on the comparison, and configuring the SMPS based on the selection.

公开(公告)号：US20220021348A1

公开(公告)日：2022-01-20

申请号：US16929353

申请日：2020-07-15

Applicant: QUALCOMM Incorporated

Inventor： Justin PHILPOTT ,  Xiaocheng JING ,  Jingxue LU ,  Iulian MIREA

IPC: H03F1/30 ,  H04B1/04 ,  H04B1/16

Abstract: Aspects of the present disclosure provide a high voltage switch with a fast turn-off. An example power supply circuit generally includes a capacitive element for coupling to a power terminal of an amplifier, a first switch configured to be closed in a first mode and to be open in a second mode, a second switch coupled in series between the first switch and the capacitive element and configured to be closed in the first mode and to be open in the second mode, a first circuit coupled to the first switch and configured to charge the capacitive element and power the amplifier in the first mode, and a buffer circuit having an output coupled to a first node and configured to output a first voltage level greater than half of a second voltage level at a second node.

公开(公告)号：US20180034466A1

公开(公告)日：2018-02-01

申请号：US15658910

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Zhiqing ZHANG ,  Brett WALKER ,  Chi Fan YUNG ,  Justin PHILPOTT ,  Joseph DUNCAN

IPC: H03K19/0185 ,  H03K19/003 ,  H03K19/00

CPC classification number: H03K19/018521 ,  H03K19/0013 ,  H03K19/00361 ,  H03K19/0175 ,  H03K19/017509 ,  H03K19/018514 ,  H04W88/02

Abstract: Certain aspects of the present disclosure provide methods and apparatus for level shifting an input signal ranging between certain voltage levels to generate an output signal ranging between other voltage levels with low power, high speed, and immunity to noise. One example level-shifting circuit generally includes a node for receiving an input signal ranging between a first voltage level and a second voltage level, a first circuit path coupled to the node and configured to level shift the input signal to generate an output signal ranging between a third voltage level and a fourth voltage level, a pulse generator coupled to the node and configured to generate a pulse based on a transition in the input signal between the first and second voltage levels, and a second circuit path connected in parallel with the first path and configured to temporarily short the first path based on the generated pulse.