公开(公告)号：US20200076299A1

公开(公告)日：2020-03-05

申请号：US16246107

申请日：2019-01-11

Applicant: QUALCOMM Incorporated

Inventor： Lin XUE ,  Iulian MIREA ,  Xiaocheng JING ,  Jongshick AHN ,  Amir PARAYANDEH ,  Linfei GUO

IPC: H02M3/158 ,  H02M1/08

Abstract: A power converter includes a voltage source for generating an input voltage, and a regulation circuit for generating a set of output voltages based on the input voltage. The regulation circuit regulates the set of output voltages in different manners based on whether the set of output voltages is greater or less than a set of corresponding reference voltages, respectively. If one or more output voltages are less than one or more of the corresponding reference voltages, the regulation circuit regulates only those one or more output voltages during a current regulation interval based on an error voltage related to one or more differences between the one or more output voltages and the corresponding one or more reference voltages, respectively. If all output voltages are greater than the corresponding reference voltages, the regulation circuit regulates only the output voltage associated with the largest load current during the current regulation interval.

公开(公告)号：US20200058603A1

公开(公告)日：2020-02-20

申请号：US16535012

申请日：2019-08-07

Applicant: QUALCOMM Incorporated

Inventor： Jongshick AHN ,  Iulian MIREA ,  Chung-Ti HSU

IPC: H01L23/64

Abstract: In certain aspects, a clamp includes first and second transistors coupled in series between a power bus and a ground. The clamp also includes a resistive voltage divider configured to bias a gate of the first transistor and a gate of the second transistor based on a supply voltage on the power bus. The clamp further includes a capacitive voltage divider configured to turn on the first and second transistors in response to a voltage transient on the power bus exceeding a trigger threshold voltage.

公开(公告)号：US20240429882A1

公开(公告)日：2024-12-26

申请号：US18339093

申请日：2023-06-21

Applicant: QUALCOMM Incorporated

Inventor： Chengwu TAO ,  Iulian MIREA ,  Song SHI ,  Jongshick AHN ,  Carl HARDIN

IPC: H03F3/24 ,  H04B1/04

Abstract: Certain aspects of the present disclosure are directed towards an amplification circuit. The amplification circuit generally includes: a first amplifier; a first power supply having an output coupled to a supply input of the first amplifier and configured to provide a first power to the supply input of the first amplifier; a second amplifier; a second power supply having an output coupled to a supply input of the second amplifier and configured to provide a second power to the supply input of the second amplifier; and a third amplifier having a supply input coupled to the first power supply and the second power supply, the first power supply and the second power supply being further configured to provide a third power to the supply input of the third amplifier.

公开(公告)号：US20210194517A1

公开(公告)日：2021-06-24

申请号：US17125252

申请日：2020-12-17

Applicant: QUALCOMM INCORPORATED

Inventor： Iulian MIREA ,  Gerard James WIMPENNY ,  Jingxue LU ,  Jongshick AHN

IPC: H04B1/04 ,  H03F1/02 ,  H03F3/24

Abstract: An envelope tracking system includes an envelope signal generator, a supply modulator coupled to the envelope signal generator, the supply modulator comprising a switching regulator path configured to provide an output voltage at an output node to a power amplifier when in an average power tracking (APT) mode, the switching regulator path configured to operate together with a linear path to provide the output voltage at the output node to the power amplifier when in an envelope tracking (ET) mode, a capacitor having a first and second terminal, the first terminal coupled to ground, a switch coupled between the output node and the second terminal of the capacitor, the switch being configured to selectively disconnect the capacitor from the output node, and a circuit coupled between the output node and the second terminal of the capacitor, the circuit comprising a bi-directional current-limiting switch, the circuit configured to charge or discharge the capacitor such that a voltage across the capacitor changes from a first voltage to a second voltage.