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    CIRCUITS AND METHODS PROVIDING AMPLIFICATION WITH INPUT COMMON MODE VOLTAGE FOLLOWING
    41.
    发明申请
    CIRCUITS AND METHODS PROVIDING AMPLIFICATION WITH INPUT COMMON MODE VOLTAGE FOLLOWING 审中-公开
    具有输入公共模式电压放大的电路和方法以下

    公开(公告)号：US20170040952A1

    公开(公告)日：2017-02-09

    申请号：US14816622

    申请日：2015-08-03

    Applicant: QUALCOMM Incorporated

    Inventor： Zongyu Dong ,  Matthew David Sienko ,  Vijayakumar Dhanasekaran ,  Mayur Kantharaj Siddanna ,  Wenchang Huang

    IPC: H03F1/32 ,  H03F3/45

    CPC classification number: H03F1/3211 ,  H03F3/45 ,  H03F3/45237 ,  H03F3/45479 ,  H03F3/4565 ,  H03F2200/372 ,  H03F2203/45022 ,  H03F2203/45072 ,  H03F2203/45112

    Abstract: Methods, systems, and circuits for providing low-noise amplification with input common mode voltage following are disclosed. A circuit includes: an amplifier configured to receive a voltage input having an input common mode voltage and configured to generate a differential voltage output having an output common mode voltage; a feedback circuit in communication with the amplifier, the feedback circuit configured to receive the input common mode voltage and the differential voltage output and to generate a feedback voltage in response to the input common mode voltage and the differential voltage output; and an adjustable current source of the amplifier configured to receive the feedback voltage and to adjust a tail current of the amplifier in response to the feedback voltage.

    Abstract translation: 公开了用于提供具有输入共模电压跟随的低噪声放大的方法，系统和电路。 电路包括：放大器，被配置为接收具有输入共模电压的电压输入并被配置为产生具有输出共模电压的差分电压输出; 与所述放大器通信的反馈电路，所述反馈电路被配置为接收所述输入共模电压和所述差分电压输出，并且响应于所述输入共模电压和所述差分电压输出而产生反馈电压; 以及放大器的可调电流源，被配置为接收反馈电压并且响应于反馈电压来调节放大器的尾电流。

    POP FREE AUTO-CHOPPER
    44.
    发明申请
    POP FREE AUTO-CHOPPER 审中-公开
    POP免费自动切割机

    公开(公告)号：US20160248455A1

    公开(公告)日：2016-08-25

    申请号：US14628930

    申请日：2015-02-23

    Applicant: QUALCOMM Incorporated

    Inventor： Vijayakumar Dhanasekaran

    IPC: H04B1/04 ,  H03F3/38

    CPC classification number: H04B1/0475 ,  H03F1/305 ,  H03F3/38 ,  H03F2200/271 ,  H03G7/002 ,  H03G7/007 ,  H03G9/025 ,  H04B2001/0416

    Abstract: Embodiments described herein provide a method and apparatus for increasing dynamic range. The method begins when a signal is input to a compander and the compander gain of the signal is measured. The compander gain level is then compared with a predetermined threshold. If the compander gain is less than the predetermined threshold, then the chopper is turned on. If the chopper is already operating as a result of a previous iteration, then it remains on after the comparison. If the compander gain is above the predetermined threshold, the chopper is turned off. The device incorporates an automatic chopper and a duty cycle shaper to provide smooth ramp up of the automatic chopper, eliminating chopper turn on sounds.

    Abstract translation: 本文描述的实施例提供了用于增加动态范围的方法和装置。 当信号被输入到压缩扩展器并且测量信号的压扩扩展增益时，该方法开始。 然后将压缩扩展器增益电平与预定阈值进行比较。 如果压缩扩展器增益小于预定阈值，则切断器被接通。 如果断路器已经作为上一次迭代的结果运行，那么在比较之后它仍然保持运行。 如果压缩扩展器增益高于预定阈值，则切断器被关闭。 该装置采用自动斩波器和占空比整形器，可自动切断斩波器，从而消除斩波器的开启声音。

    FAST, LOW POWER COMPARATOR WITH DYNAMIC BIAS BACKGROUND
    46.
    发明申请
    FAST, LOW POWER COMPARATOR WITH DYNAMIC BIAS BACKGROUND 有权
    具有动态偏置的快速，低功率比较技术背景

    公开(公告)号：US20140232457A1

    公开(公告)日：2014-08-21

    申请号：US13773427

    申请日：2013-02-21

    Applicant: QUALCOMM INCORPORATED

    Inventor： Vijayakumar Dhanasekaran

    IPC: H03F3/45

    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。

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