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公开(公告)号：US11803204B2
公开(公告)日：2023-10-31
申请号：US17239377
申请日：2021-04-23
Applicant: QUALCOMM Incorporated
Inventor： Xiaodong Meng , Fan Yang , Yufei Pan , Hua Guan , Kuan Chuang Koay , Jize Jiang
Abstract: The disclosure relates to an apparatus including: a first set of one or more field effect transistors (FETs) coupled between a first voltage rail and a load; a second set of one or more FETs coupled between the first voltage rail and the load; a gate voltage control circuit configured to: provide a first set of gate voltages to first and second gates of the first and second sets of one or more FETs in accordance with a first mode of operation, respectively; and provide a second set of gate voltages to the first and second gates of the first and second sets of one or more FETs in accordance with a second mode of operation, respectively; and a voltage droop compensation circuit configured to control an output voltage across the load during a transition from the first mode of operation to the second mode of operation.
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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.
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公开(公告)号：US11650610B2
公开(公告)日：2023-05-16
申请号：US17350535
申请日：2021-06-17
Applicant: QUALCOMM Incorporated
Inventor： Hua Guan , Fan Yang , Hardik Patel
Abstract: Certain aspects of the present disclosure provide a power supply system. The power supply system generally includes a first voltage regulator and a second voltage regulator, outputs of the first voltage regulator and the second voltage regulator being coupled to an output of the power supply system. The power supply system may also include a current balancer circuit configured to adjust an output current of the first voltage regulator based on determined headrooms of the first voltage regulator and the second voltage regulator.
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公开(公告)号：US11385667B2
公开(公告)日：2022-07-12
申请号：US16724150
申请日：2019-12-20
Applicant: QUALCOMM Incorporated
Inventor： Kuan Chuang Koay , Hua Guan , YuFei Pan
Abstract: An LDO regulator is provided that includes a bias circuit that generates a bias current having a non-linear relationship to an output current for the LDO regulator. The LDO regulator is also configured to clamp the output current.
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Patent Agency Ranking
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.
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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.
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公开(公告)号：US09471078B1
公开(公告)日：2016-10-18
申请号：US14675262
申请日：2015-03-31
Applicant: QUALCOMM Incorporated
Inventor： Hua Guan , Vincenzo Peluso , Liangguo Shen
IPC: G05F1/575
Abstract: In one embodiment, a low-dropout regulator comprises a pass transistor having a first terminal to receive an input voltage, a second terminal to provide an output voltage, and a gate terminal. A feedback circuit is coupled between the second terminal of the pass transistor and ground to generate a feedback voltage in response to the output voltage. A comparator has an output to generate a control voltage in response to the feedback voltage and a reference voltage. A switch is coupled between the output of the charge pump and the gate terminal of the pass transistor to selectively provide the control voltage to the gate terminal.
Abstract translation: 在一个实施例中，低压差稳压器包括具有接收输入电压的第一端子的传输晶体管，提供输出电压的第二端子和栅极端子。 反馈电路耦合在传输晶体管的第二端和地之间以产生响应于输出电压的反馈电压。 比较器具有响应于反馈电压和参考电压而产生控制电压的输出。 开关耦合在电荷泵的输出端和传输晶体管的栅极端子之间，以选择性地向栅极端子提供控制电压。
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公开(公告)号：US20160291619A1
公开(公告)日：2016-10-06
申请号：US14675262
申请日：2015-03-31
Applicant: QUALCOMM Incorporated
Inventor： Hua Guan , Vincenzo Peluso , Liangguo Shen
IPC: G05F1/575
Abstract: In one embodiment, a low-dropout regulator comprises a pass transistor having a first terminal to receive an input voltage, a second terminal to provide an output voltage, and a gate terminal. A feedback circuit is coupled between the second terminal of the pass transistor and ground to generate a feedback voltage in response to the output voltage. A comparator has an output to generate a control voltage in response to the feedback voltage and a reference voltage. A switch is coupled between the output of the charge pump and the gate terminal of the pass transistor to selectively provide the control voltage to the gate terminal.
Abstract translation: 在一个实施例中，低压差稳压器包括具有接收输入电压的第一端子的传输晶体管，提供输出电压的第二端子和栅极端子。 反馈电路耦合在传输晶体管的第二端和地之间以产生响应于输出电压的反馈电压。 比较器具有响应于反馈电压和参考电压而产生控制电压的输出。 开关耦合在电荷泵的输出端和传输晶体管的栅极端子之间，以选择性地向栅极端子提供控制电压。
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公开(公告)号：US20140070618A1
公开(公告)日：2014-03-13
申请号：US13804666
申请日：2013-03-14
Applicant: QUALCOMM INCORPORATED
Inventor： Nihit Bajaj , Cheong Kun , Baiying Yu , Hua Guan
IPC: H02J7/00
CPC classification number: H02J7/0052 , H02J7/0031 , H02J7/0034 , H02J2007/0037 , Y10T307/625
Abstract: Disclosed is battery charging circuit having a first detection circuit and a second detection circuit for detecting when to terminate an activated voltage collapse protection operation. The first detection circuit may be an analog design and the second detection circuit may include digital circuitry.
Abstract translation: 公开了具有第一检测电路和第二检测电路的电池充电电路，用于检测何时终止激活的电压崩溃保护操作。 第一检测电路可以是模拟设计，第二检测电路可以包括数字电路。
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