公开(公告)号：US11258409B2

公开(公告)日：2022-02-22

申请号：US16929353

申请日：2020-07-15

Applicant: QUALCOMM Incorporated

Inventor： Justin Philpott ,  Xiaocheng Jing ,  Jingxue Lu ,  Iulian Mirea

IPC: H03F3/04 ,  H03F1/30 ,  H04B1/04 ,  H04B1/16 ,  H03F1/02

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：US10924017B2

公开(公告)日：2021-02-16

申请号：US16440434

申请日：2019-06-13

Applicant: QUALCOMM Incorporated

Inventor： Linfei Guo ,  Chengwu Tao ,  Joseph Duncan ,  Amir Parayandeh ,  Xiaocheng Jing ,  Justin Philpott ,  Lin Xue

IPC: H02M3/158 ,  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 selecting a first output of a plurality of outputs of the SMPS based on a power demand associated with each of the plurality of outputs if a voltage at the first output is less than a reference voltage associated with the first output, by selecting as the first output one of the plurality of outputs having the highest power demand, and based on an amount of overcharge associated with the first output if the voltage at the first output is greater than the reference voltage, by selecting as the first output one of the plurality of outputs having the lowest amount of overcharge. The method may also include directing current across an inductive element of the SMPS to the first output based on the selection.

公开(公告)号：US10958168B2

公开(公告)日：2021-03-23

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: H02M3/156 ,  H02M3/158 ,  H02M1/00

Abstract: 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.