-
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
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.
-
公开(公告)号：US12181903B2
公开(公告)日：2024-12-31
申请号：US18315402
申请日：2023-05-10
Applicant: QUALCOMM Incorporated
Inventor： Kuan Chuang Koay , Hua Guan , Jize Jiang
Abstract: In certain aspects, a system includes an amplifying circuit having an input and an output, a high-pass filter coupled between a gate of a pass transistor of a low dropout (LDO) regulator and the input of the amplifying circuit, and a metal-oxide-semiconductor (MOS) capacitor coupled between the output of the amplifying circuit and the gate of the pass transistor.
-
公开(公告)号：US11409313B2
公开(公告)日：2022-08-09
申请号：US17138463
申请日：2020-12-30
Applicant: QUALCOMM Incorporated
Inventor： Jize Jiang , Hua Guan , Kuan Chuang Koay
Abstract: Aspects of the present disclosure provide a voltage reference architecture. An example circuit generally includes a resistor ladder, a reference current source, and a plurality of multiplexers. The resistor ladder comprises a plurality of resistive elements coupled in series. The reference current source has an output coupled to the resistor ladder. The plurality of multiplexers have inputs coupled to one or more nodes between the plurality of resistive elements and the output of the reference current source, each of the multiplexers having an output selectively coupled to one of the inputs of the multiplexer.
-
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：US10333393B2
公开(公告)日：2019-06-25
申请号：US15274525
申请日：2016-09-23
Applicant: QUALCOMM Incorporated
Inventor： Loai Galal Bahgat Salem , Hua Guan , Ngai Yeung Ho
Abstract: Certain aspects of the present disclosure provide methods and apparatus for implementing a voltage regulator. The voltage regulator includes a power field effect transistor (FET) comprising a gate terminal. The voltage regulator further includes a charge pump, the charge pump comprising a capacitor switchably coupled to the gate terminal. The voltage regulator further includes a current outputting amplifier switchably coupled to the capacitor.
-
公开(公告)号：US09817415B2
公开(公告)日：2017-11-14
申请号：US14800375
申请日：2015-07-15
Applicant: QUALCOMM Incorporated
Inventor： Vincenzo F. Peluso , Liangguo Shen , Hua Guan , Mengmeng Du , Ngai Yeung Ho
Abstract: A low drop-out regulator circuit comprises a pass transistor providing an output voltage on an output terminal in response to a gate voltage on a gate of the pass transistor. A feedback circuit is coupled to the output terminal to generate a feedback voltage, and an error amplifier provides a drive signal in response to a reference voltage and the feedback voltage. A first gate driver circuit is operable over a first voltage range to provide the gate voltage to the pass transistor in response to the drive signal. A second gate driver circuit is operable over a second voltage range to provide the gate voltage to the pass transistor in response to the drive signal, where the second voltage range is lower than the first voltage range.
-
公开(公告)号：US20170060155A1
公开(公告)日：2017-03-02
申请号：US14837308
申请日：2015-08-27
Applicant: QUALCOMM Incorporated
Inventor： Vincenzo Peluso , Hua Guan
IPC: G05F1/575
CPC classification number: G05F1/575 , H02M2001/0009
Abstract: A voltage regulator having current sense capability may include an input node and an output node. A first output device may be electrically connected between the input node and the output node, and configured to control current flow through the first output device to regulate a voltage at the output node. A current sense circuit may be configured to produce a signal that is indicative of the current through the first output device. The current sense circuit may be configured to perform a first kind of offset compensation operation to reduce an offset voltage in an error amplifier of the current sense circuit, and to perform a second kind of offset compensation operation to reduce the offset voltage in the error amplifier.
Abstract translation: 具有电流检测能力的电压调节器可以包括输入节点和输出节点。 第一输出设备可以电连接在输入节点和输出节点之间，并且被配置为控制通过第一输出设备的电流流动以调节输出节点处的电压。 电流感测电路可以被配置为产生指示通过第一输出设备的电流的信号。 电流感测电路可以被配置为执行第一种偏移补偿操作以减小电流检测电路的误差放大器中的偏移电压，并且执行第二种偏移补偿操作以减小误差放大器中的偏移电压 。
-
公开(公告)号：US09236752B2
公开(公告)日：2016-01-12
申请号：US13804666
申请日：2013-03-14
Applicant: QUALCOMM Incorporated
Inventor： Nihit Bajaj , Cheong Kun , Baiying Yu , Hua Guan
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。
-
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.
-
-
-
-
-
-
-
-
-
Search Results
29
records
(took 0.019 seconds)
