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    Multi-stage amplifier
    32.
    发明授权
    Multi-stage amplifier 有权
    多级放大器

    公开(公告)号：US09035699B2

    公开(公告)日：2015-05-19

    申请号：US13720884

    申请日：2012-12-19

    Applicant: QUALCOMM Incorporated

    Inventor： Vijayakumar Dhanasekaran

    IPC: H03F3/26 ,  H03F1/02 ,  H03F3/30 ,  H03F3/45

    CPC classification number: H03F1/0227 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/408 ,  H03F2200/513

    Abstract: Exemplary embodiments are directed to operating a multi-stage amplifier with low-voltage supply voltages. A multi-stage amplifier may include a first path of an amplifier output stage configured to convey an output signal if a first supply voltage is greater than a threshold voltage. The multi-stage amplifier may also include a second path of the amplifier output stage configured to convey the output signal if the first supply voltage is less than or equal to the threshold voltage.

    Abstract translation: 示例性实施例涉及操作具有低电压电源电压的多级放大器。 多级放大器可以包括放大器输出级的第一路径，其被配置为在第一电源电压大于阈值电压时传送输出信号。 多级放大器还可以包括放大器输出级的第二路径，其被配置为在第一电源电压小于或等于阈值电压时传送输出信号。

    Fast, low power comparator with dynamic bias background
    33.
    发明授权
    Fast, low power comparator with dynamic bias background 有权
    具有动态偏置背景的快速，低功耗比较器

    公开(公告)号：US08947125B2

    公开(公告)日：2015-02-03

    申请号：US13773427

    申请日：2013-02-21

    Applicant: QUALCOMM Incorporated

    Inventor： Vijayakumar Dhanasekaran

    IPC: H03K5/22 ,  H03F3/45 ,  H02M3/156 ,  H02M1/00

    CPC classification number: H03F3/45 ,  H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

    Abstract: A comparator circuit comprising an operational amplifier configured to compare a difference between a switching voltage and a reference voltage, and a dynamically adjustable bias current generator coupled to the operational amplifier. A method of conserving power in a comparator circuit includes estimating a switching regulator load current value, communicating the value to a current bias generator, enabling the bias generator with a signal from a switching regulator PFM logic circuit, and establishing a bias current at an operational amplifier of the comparator circuit on the basis of the enabling.

    Abstract translation: 一种比较器电路，包括被配置为比较开关电压和参考电压之间的差异的运算放大器以及耦合到运算放大器的动态可调偏置电流发生器。 一种在比较器电路中节省功率的方法包括估计开关调节器负载电流值，将该值传送到电流偏置发生器，使得偏置发生器能够使用来自开关调节器PFM逻辑电路的信号，以及在操作时建立偏置电流 在比较器电路的放大器的基础上启用。

    LOW VOLTAGE MULTI-STAGE AMPLIFIER
    34.
    发明申请
    LOW VOLTAGE MULTI-STAGE AMPLIFIER 有权
    低电压多级放大器

    公开(公告)号：US20140028397A1

    公开(公告)日：2014-01-30

    申请号：US13793933

    申请日：2013-03-11

    Applicant: QUALCOMM INCORPORATED

    Inventor： Vijayakumar Dhanasekaran

    IPC: H03F3/45

    CPC classification number: H03F3/45179 ,  H03F1/0261 ,  H03F1/22 ,  H03F1/223 ,  H03F3/211 ,  H03F3/3022 ,  H03F3/345 ,  H03F2200/405 ,  H03F2200/408 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/61

    Abstract: A low voltage multi-stage amplifier is described. The low voltage multi-stage amplifier includes one or more prior stages. The low voltage multi-stage amplifier also includes a supply stage. The low voltage multi-stage amplifier further includes an output stage that operates with a supply voltage as low as a sum of a threshold voltage of a first transistor in the output stage and a saturation voltage of a second transistor of the supply stage. The supply stage supplies the output stage.

    Abstract translation: 描述了一种低电压多级放大器。 低压多级放大器包括一个或多个前级。 低压多级放大器还包括供电级。 低电压多级放大器还包括输出级，其工作电压低至输出级中的第一晶体管的阈值电压与供电级的第二晶体管的饱和电压之和的电压。 供应阶段提供输出级。

    Overvoltage protection scheme for connector ports
    35.
    发明授权
    Overvoltage protection scheme for connector ports 有权

    公开(公告)号：US11552434B2

    公开(公告)日：2023-01-10

    申请号：US17325463

    申请日：2021-05-20

    Applicant: QUALCOMM Incorporated

    Inventor： Vijayakumar Dhanasekaran

    IPC: H01R13/713

    Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for providing overvoltage protection for circuitry coupled to connector ports, such as USB-C ports. One example circuit for overvoltage protection between a connector port and a signal node corresponding to the connector port generally includes a first switch having a first terminal for coupling to the connector port and having a second terminal for coupling to the signal node; a first resistive element coupled in parallel with the first switch; a first transient protection circuit coupled between the signal node and a reference potential node; and a control circuit having an input coupled to the signal node and having a first output coupled to a control input of the first switch.

    Audio non-linearity cancellation for switches for audio and other applications
    36.
    发明授权
    Audio non-linearity cancellation for switches for audio and other applications 有权

    公开(公告)号：US11522572B1

    公开(公告)日：2022-12-06

    申请号：US17323685

    申请日：2021-05-18

    Applicant: QUALCOMM Incorporated

    Inventor： Kshitij Yadav ,  Vijayakumar Dhanasekaran

    IPC: H04B1/40 ,  H03F3/19 ,  H03F3/18 ,  H03F3/193 ,  H03F3/185

    Abstract: An aspect includes an apparatus including a first amplifier; a first field effect transistor (FET) including a first source coupled to an output of the first amplifier, and a first drain for coupling to a first load; and a first gate drive circuit including an input coupled to the output of the first amplifier and an output coupled to a first gate of the first FET. Another aspect includes a method including amplifying a first audio signal using a first audio amplifier to generate a first voltage; generating a first gate voltage based on the first voltage; applying the first gate voltage to a first gate of a first field effect transistor (FET) coupled between the first audio amplifier and a first audio transducer; and applying the first voltage to a first source of the first FET.

    Low-glitch switch control for mode switching of memory cells
    37.
    发明授权
    Low-glitch switch control for mode switching of memory cells 有权

    公开(公告)号：US11348621B2

    公开(公告)日：2022-05-31

    申请号：US17000163

    申请日：2020-08-21

    Applicant: QUALCOMM Incorporated

    Inventor： Kshitij Yadav ,  Vijayakumar Dhanasekaran ,  Yan Wang

    IPC: G11C5/14 ,  H03K19/20

    Abstract: An apparatus for power supply mode switching includes a first voltage regulator to output a first voltage, a second voltage regulator to output a second voltage, a third voltage regulator to output a third voltage, an electronic load, a first switch between the first voltage regulator and the electronic load, a second switch between the second voltage regulator and the electronic load, and a third switch between the third voltage regulator and the electronic load. And, a method for power supply mode switching includes supplying power to an electronic load with a first voltage; switching to a second voltage; maintaining coupling of the electronic load with the second voltage while a voltage across the electronic load is less than a reference voltage; and switching to a third voltage when the voltage is greater than or equal to the reference voltage and the third voltage is less than the second voltage.

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