-
公开(公告)号：US20230299655A1
公开(公告)日：2023-09-21
申请号：US18324694
申请日：2023-05-26
Applicant: Qualcomm Incorporated
Inventor： Kan Li , Guolei Yu , Hua Guan , Todd Robert Sutton
CPC classification number: H02M1/0029 , H02M3/158 , H02M1/08
Abstract: An apparatus is disclosed for adaptive switch driving. In an example aspect, the apparatus includes a switching circuit configured to selectively be in a first state that provides an input voltage as an output voltage, be in a second state that provides a ground voltage as the output voltage, or be in a third state that causes the output voltage to change from the input voltage to the ground voltage according to a slew rate. The third state enables the switching circuit to transition from the first state to the second state. The switching circuit is also configured to adjust the slew rate of the output voltage for the third state responsive to at least one of the following: a change in a magnitude of a direct-current supply voltage or a change in a magnitude of an input current.
-
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
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：US11190173B2
公开(公告)日：2021-11-30
申请号：US17247160
申请日：2020-12-02
Applicant: QUALCOMM Incorporated
Inventor： Jize Jiang , Kan Li
Abstract: According to certain aspects, a driver includes an output transistor coupled between a first rail and an output of the driver, a first current source coupled to a gate of the output transistor, a second current source, and a switch, wherein the switch and the second current source are coupled in series between the gate of the output transistor and a second rail. The driver also includes a current sensor configured to generate a sense current based on an output current of the driver, and a reference current source configured to generate a reference current, wherein the current sensor and the reference current source are coupled to a control input of the switch.
-
公开(公告)号：US20210367512A1
公开(公告)日：2021-11-25
申请号：US17307904
申请日：2021-05-04
Applicant: Qualcomm Incorporated
Inventor： Kan Li , Guolei Yu , Hua Guan , Todd Robert Sutton
Abstract: An apparatus is disclosed for adaptive switch driving. In an example aspect, the apparatus includes a switching circuit configured to selectively be in a first state that provides an input voltage as an output voltage, be in a second state that provides a ground voltage as the output voltage, or be in a third state that causes the output voltage to change from the input voltage to the ground voltage according to a slew rate. The third state enables the switching circuit to transition from the first state to the second state. The switching circuit is also configured to adjust the slew rate of the output voltage for the third state responsive to at least one of the following: a change in a magnitude of a direct-current supply voltage or a change in a magnitude of an input 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
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.
-
Patent Agency Ranking
公开(公告)号：US10938381B1
公开(公告)日：2021-03-02
申请号：US16858343
申请日：2020-04-24
Applicant: QUALCOMM Incorporated
Inventor： Jize Jiang , Kan Li
Abstract: According to certain aspects, a driver includes an output transistor coupled between a first rail and an output of the driver, a first current source coupled to a gate of the output transistor, a second current source, and a switch, wherein the switch and the second current source are coupled in series between the gate of the output transistor and a second rail. The driver also includes a current sensor configured to generate a sense current based on an output current of the driver, and a reference current source configured to generate a reference current, wherein the current sensor and the reference current source are coupled to a control input of the switch.
-
公开(公告)号：US12249901B2
公开(公告)日：2025-03-11
申请号：US18324694
申请日：2023-05-26
Applicant: Qualcomm Incorporated
Inventor： Kan Li , Guolei Yu , Hua Guan , Todd Robert Sutton
Abstract: An apparatus is disclosed for adaptive switch driving. In an example aspect, the apparatus includes a switching circuit configured to selectively be in a first state that provides an input voltage as an output voltage, be in a second state that provides a ground voltage as the output voltage, or be in a third state that causes the output voltage to change from the input voltage to the ground voltage according to a slew rate. The third state enables the switching circuit to transition from the first state to the second state. The switching circuit is also configured to adjust the slew rate of the output voltage for the third state responsive to at least one of the following: a change in a magnitude of a direct-current supply voltage or a change in a magnitude of an input current.
-
公开(公告)号：US11664716B2
公开(公告)日：2023-05-30
申请号：US17307904
申请日：2021-05-04
Applicant: Qualcomm Incorporated
Inventor： Kan Li , Guolei Yu , Hua Guan , Todd Robert Sutton
CPC classification number: H02M1/0029 , H02M3/158 , H02M1/08 , H02M1/385
Abstract: An apparatus is disclosed for adaptive switch driving. In an example aspect, the apparatus includes a switching circuit configured to selectively be in a first state that provides an input voltage as an output voltage, be in a second state that provides a ground voltage as the output voltage, or be in a third state that causes the output voltage to change from the input voltage to the ground voltage according to a slew rate. The third state enables the switching circuit to transition from the first state to the second state. The switching circuit is also configured to adjust the slew rate of the output voltage for the third state responsive to at least one of the following: a change in a magnitude of a direct-current supply voltage or a change in a magnitude of an input current.
-
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
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.
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.022 seconds)
