公开(公告)号：US10340854B2

公开(公告)日：2019-07-02

申请号：US15643124

申请日：2017-07-06

Applicant: QUALCOMM Incorporated

Inventor： Zhiqing Zhang ,  Chi Fan Yung ,  Joseph Duncan ,  Jun Hua ,  Song Shi ,  Thomas Marra

IPC: H03F1/30 ,  H03F1/02 ,  H02M3/155 ,  H03F3/195 ,  H03F3/213

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating an envelope tracking power supply voltage. For example, certain aspects of the present disclosure provide an envelope tracking power supply having a linear amplifier having an output coupled to a power supply node of an amplifier, wherein a power supply node of the linear amplifier is coupled to a first voltage supply node. The envelope tracking power supply may also include a switch mode power supply having an output coupled to the power supply node of the amplifier. Certain aspects also include a circuit having a first switch coupled to the first voltage supply node and a second switch coupled to a second voltage supply node, wherein a power supply node of the switch mode power supply is coupled to the first switch and the second switch.

公开(公告)号：US20180284830A1

公开(公告)日：2018-10-04

申请号：US15713215

申请日：2017-09-22

Applicant: Qualcomm Incorporated

Inventor： Chi Fan Yung ,  Xiaodan Zou ,  Ngai Yeung Ho ,  Hua Guan ,  Kan Li

IPC: G05F1/66 ,  G05F1/569

CPC classification number: G05F1/66 ,  G05F1/569 ,  G05F1/573 ,  G05F1/575

Abstract: An integrated circuit is disclosed for current-controlled voltage regulation. In an example aspect, the integrated circuit includes a voltage regulator and a current-controlled clamp. The voltage regulator has a regulator output node and produces a regulator current. The voltage regulator includes an error amplifier and an output transistor. The error amplifier has first and second input nodes and an error amplifier output node, with the first input node coupled to a reference voltage. The error amplifier generates an error amplifier output voltage at the output node. The output transistor is coupled between the error amplifier output node and the regulator output node. The output transistor is coupled to the second input node via the regulator output node to establish a feedback path for the voltage regulator. The current-controlled clamp is coupled to the error amplifier output node and clamps the error amplifier output voltage based on the regulator current.

公开(公告)号：US11009901B2

公开(公告)日：2021-05-18

申请号：US15813629

申请日：2017-11-15

Applicant: QUALCOMM Incorporated

Inventor： Chi Fan Yung ,  Hua Guan ,  Ngai Yeung Ho ,  Kan Li

IPC: G05F1/563 ,  G05F1/575 ,  G05F3/24 ,  G11C7/06 ,  G11C7/10 ,  G11C11/4074 ,  G11C5/14

Abstract: Certain aspects of the present disclosure generally relate a regulator. For example, the regulator may include a control stage, a sense capacitor having first and second terminals, the first terminal coupled to an output of the voltage regulator, and a current amplifier having an input coupled to the second terminal of the sense capacitor and an output coupled to the control stage. The control stage of the regulator may adjust the output voltage of the regulator based at least in part on a current generated by the current amplifier.

公开(公告)号：US10651799B2

公开(公告)日：2020-05-12

申请号：US16457442

申请日：2019-06-28

Applicant: QUALCOMM Incorporated

Inventor： Zhiqing Zhang ,  Chi Fan Yung ,  Joseph Duncan ,  Jun Hua ,  Song Shi ,  Thomas Marra

IPC: H03F1/30 ,  H03F1/02 ,  G06F1/3212 ,  G06F1/26 ,  H02M3/155 ,  H03F3/195 ,  H03F3/213 ,  H04B1/04

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating an envelope tracking power supply voltage. For example, certain aspects of the present disclosure provide an envelope tracking power supply having a linear amplifier having an output coupled to a power supply node of an amplifier, wherein a power supply node of the linear amplifier is coupled to a first voltage supply node. The envelope tracking power supply may also include a switch mode power supply having an output coupled to the power supply node of the amplifier. Certain aspects also include a circuit having a first switch coupled to the first voltage supply node and a second switch coupled to a second voltage supply node, wherein a power supply node of the switch mode power supply is coupled to the first switch and the second switch.

公开(公告)号：US10274986B2

公开(公告)日：2019-04-30

申请号：US15713215

申请日：2017-09-22

Applicant: Qualcomm Incorporated

Inventor： Chi Fan Yung ,  Xiaodan Zou ,  Ngai Yeung Ho ,  Hua Guan ,  Kan Li

IPC: G05F1/575 ,  G05F1/66 ,  G05F1/569 ,  G05F1/573

Abstract: An integrated circuit is disclosed for current-controlled voltage regulation. In an example aspect, the integrated circuit includes a voltage regulator and a current-controlled clamp. The voltage regulator has a regulator output node and produces a regulator current. The voltage regulator includes an error amplifier and an output transistor. The error amplifier has first and second input nodes and an error amplifier output node, with the first input node coupled to a reference voltage. The error amplifier generates an error amplifier output voltage at the output node. The output transistor is coupled between the error amplifier output node and the regulator output node. The output transistor is coupled to the second input node via the regulator output node to establish a feedback path for the voltage regulator. The current-controlled clamp is coupled to the error amplifier output node and clamps the error amplifier output voltage based on the regulator current.

公开(公告)号：US09946283B1

公开(公告)日：2018-04-17

申请号：US15296608

申请日：2016-10-18

Applicant: QUALCOMM Incorporated

Inventor： Chi Fan Yung ,  Xiaodan Zou ,  Ngai Yeung Ho ,  Kan Li ,  Hua Guan

IPC: G05F1/575

CPC classification number: G05F1/575

Abstract: Certain aspects of the present disclosure generally relate a dual feedback loop regulator. For example, the regulator may include a first amplifier having an output coupled to an output node of the regulator, the output node further coupled to a first feedback path and a second feedback path of the regulator. A first input of a second amplifier may be coupled to the first feedback path and a second input of the second amplifier may be coupled to a reference path. The regulator may also include a transconductance stage having a first transistor and a first current source, the first transistor and the current source coupled to the first feedback path and the second feedback path, and a transimpedance stage coupled to the transconductance stage and an input of the first amplifier.

公开(公告)号：US09886048B2

公开(公告)日：2018-02-06

申请号：US15256315

申请日：2016-09-02

Applicant: QUALCOMM Incorporated

Inventor： Mengmeng Du ,  Hua Guan ,  Ngai Yeung Ho ,  Chi Fan Yung

IPC: G05F1/565 ,  G05F1/575

CPC classification number: G05F1/575 ,  G05F1/565

Abstract: A voltage regulator control implementation dynamically detects and sets specified headroom for a low dropout (LDO) regulator at different loads to enable the LDO regulator to maintain high performance in conjunction with improved power efficiency. In one instance, an upstream voltage regulator may adaptively adjust an output voltage supplied to an input supply rail of a downstream LDO regulator based on an indication from the LDO regulator. The adaptively adjusted input voltage enables the downstream LDO regulator to achieve high performance and improved power efficiency across the entire range of load conditions.