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45 条记录 (耗时 0.017 秒)

    DC-to-DC converter
    1.
    发明授权
    DC-to-DC converter 有权

    公开(公告)号：US09941790B2

    公开(公告)日：2018-04-10

    申请号：US14830415

    申请日：2015-08-19

    申请人： QUALCOMM Incorporated

    发明人： Vijayakumar Dhanasekaran

    IPC分类号： H02M3/156 ,  H02M3/158 ,  H02M3/335 ,  H02M1/00

    CPC分类号： H02M3/158 ,  H02M3/156 ,  H02M3/335 ,  H02M3/33561 ,  H02M2001/0003 ,  H02M2001/009

    摘要： A method and an apparatus for DC-to-DC conversion are provided. The apparatus is a DC-to-DC converter including a first feedback current control circuit coupled to a first voltage output of the DC-to-DC converter. The first feedback current control circuit is configured to generate a first control current based on a voltage difference between a first reference voltage and the first voltage output of the DC-to-DC converter. The apparatus further includes a constant charge comparator coupled to the first feedback current control circuit and configured to compare an integrated error signal to a threshold to generate a comparison result, the integrated error signal comprising an integration of a first error signal over time, the first error signal based on the first control current.

    FM filtering for class-G/H headphones
    4.
    发明授权
    FM filtering for class-G/H headphones 有权
    FM-G / H耳机的滤波器

    公开(公告)号：US09326073B2

    公开(公告)日：2016-04-26

    申请号：US14251543

    申请日：2014-04-11

    申请人： QUALCOMM Incorporated

    发明人： Vijayakumar Dhanasekaran

    IPC分类号： H04R5/033 ,  H04R5/04 ,  H03G3/20 ,  H03F3/181 ,  H03F1/02 ,  H03F3/21

    CPC分类号： H04R5/033 ,  H03F1/0227 ,  H03F3/181 ,  H03F3/21 ,  H03G3/20 ,  H04R5/04 ,  H04R2420/05

    摘要： A radio frequency filtering circuit for audio headphones includes a switching power supply, audio amplifier section, one or more outputs from the audio amplifier section to one or more corresponding channels of the audio headphones, one or more L-C low pass filters arranged between the switching power supply and the audio amplifier section, and one or more L-C low pass filters arranged between the audio amplifier section and the one or more corresponding channels of the audio headphones. A method of filtering radio frequency signals for audio headphones includes providing an input voltage from a switching power supply section of a filtering circuit, passing the input voltage through an L-C low pass filter arranged between the switching power supply section and an audio amplifier section, and passing an output of the audio amplifier section through a second L-C low pass filter arranged between the audio amplifier section and an audio output to the headphones.

    摘要翻译： 用于音频耳机的射频滤波电路包括开关电源，音频放大器部分，从音频放大器部分到音频耳机的一个或多个相应通道的一个或多个输出，一个或多个LC低通滤波器，布置在开关电源 电源和音频放大器部分，以及布置在音频放大器部分和音频耳机的一个或多个相应通道之间的一个或多个LC低通滤波器。 一种过滤用于音频耳机的射频信号的方法包括从滤波电路的开关电源部分提供输入电压，使输入电压通过布置在开关电源部分和音频放大器部分之间的LC低通滤波器，以及 通过布置在音频放大器部分和耳机的音频输出之间的第二LC低通滤波器使音频放大器部分的输出通过。

    System and method for suppression of peaking in an external LC filter of a buck regulator
    5.
    发明授权
    System and method for suppression of peaking in an external LC filter of a buck regulator 有权
    抑制降压调节器外部LC滤波器峰值的系统和方法

    公开(公告)号：US09071136B2

    公开(公告)日：2015-06-30

    申请号：US13645280

    申请日：2012-10-04

    申请人： QUALCOMM Incorporated

    发明人： Ankit Srivastava ,  Vijayakumar Dhanasekaran

    IPC分类号： G05F1/563 ,  H02M3/156 ,  H02M1/00 ,  H02M1/12

    CPC分类号： H02M3/156 ,  H02M1/12 ,  H02M2001/0025 ,  H02M2001/0032 ,  Y02B70/16

    摘要： Disclosed are systems and methods for suppressing voltage peaking in a buck regulator. In one aspect, a buck regulator comprises: a pulse-width modulator (PWM) that generates a pulsed signal; a switch operable to selectively connect the regulator to a DC power supply in response to the pulsed signal and output a pulsed output DC signal; a filter for filtering out high frequency noise from the pulsed output DC signal and generating a regulated output signal; an integrator for comparing the pulsed output DC signal with a reference voltage signal and generating an error signal for input to the PWM; a subtractor operable to subtract the reference voltage signal from the filtered output signal to generate an error feedback signal; and an adder operable to add the error feedback signal to the error signal for input to the pulse-width modulator in order to suppress voltage peaks in the filtered output signal.

    摘要翻译： 公开了用于抑制降压调节器中的峰值电压的系统和方法。 一方面，降压调节器包括：产生脉冲信号的脉冲宽度调制器（PWM）; 开关，其可操作以响应于所述脉冲信号选择性地将调节器连接到DC电源并输出脉冲输出DC信号; 用于从脉冲输出DC信号滤除高频噪声并产生调节输出信号的滤波器; 用于将脉冲输出DC信号与参考电压信号进行比较并产生用于输入到PWM的误差信号的积分器; 减法器，用于从滤波的输出信号中减去参考电压信号以产生误差反馈信号; 以及加法器，用于将误差反馈信号添加到误差信号以输入到脉宽调制器，以便抑制经滤波的输出信号中的电压峰值。

    GLITCH SUPPRESSION IN DC-TO-DC POWER CONVERSION
    6.
    发明申请
    GLITCH SUPPRESSION IN DC-TO-DC POWER CONVERSION 审中-公开
    直流到直流电源转换中的GLITCH抑制

    公开(公告)号：US20140103897A1

    公开(公告)日：2014-04-17

    申请号：US13654341

    申请日：2012-10-17

    申请人： QUALCOMM INCORPORATED

    发明人： Le Wang ,  Xiaohong Quan ,  Vijayakumar Dhanasekaran ,  Omid Shoaei

    IPC分类号： G05F3/08

    CPC分类号： H02M3/07 ,  H02M1/38 ,  H02M2001/0029 ,  H03K17/162 ,  H03K17/164

    摘要： Exemplary embodiments are directed to devices and method for operating a charge pump. A method may include activating a first switch coupled between a capacitor and a ground voltage over a first period of a charging phase. The first period may coincide with a non-overlapping time between the charging phase and an output phase. The method may also include activating a second switch coupled between the capacitor and an input voltage over a second period of the charging phase, wherein the first period begins prior to the second period. Further, the method may include deactivating the second switch over a third period of the charging phase and deactivating the first switch over a fourth period of the charging phase, wherein the third period begins prior to the fourth period.

    摘要翻译： 示例性实施例涉及用于操作电荷泵的装置和方法。 一种方法可以包括在充电阶段的第一周期上激活耦合在电容器和接地电压之间的第一开关。 第一周期可以与充电阶段和输出阶段之间的非重叠时间重合。 该方法还可以包括在充电阶段的第二周期内激活耦合在电容器和输入电压之间的第二开关，其中第一周期在第二周期之前开始。 此外，该方法可以包括在充电阶段的第三周期内去激活第二开关，并且在充电阶段的第四周期上去激活第一开关，其中第三周期在第四周期之前开始。

    SYSTEM AND METHOD FOR SUPPRESSION OF PEAKING IN AN EXTERNAL LC FILTER OF A BUCK REGULATOR
    7.
    发明申请
    SYSTEM AND METHOD FOR SUPPRESSION OF PEAKING IN AN EXTERNAL LC FILTER OF A BUCK REGULATOR 有权
    用于抑制BUCK调节器的外部LC滤波器中的峰值的系统和方法

    公开(公告)号：US20130257398A1

    公开(公告)日：2013-10-03

    申请号：US13645280

    申请日：2012-10-04

    申请人： QUALCOMM INCORPORATED

    发明人： Ankit Srivastava ,  Vijayakumar Dhanasekaran

    IPC分类号： G05F1/62

    CPC分类号： H02M3/156 ,  H02M1/12 ,  H02M2001/0025 ,  H02M2001/0032 ,  Y02B70/16

    摘要： Disclosed are systems and methods for suppressing voltage peaking in a buck regulator. In one aspect, a buck regulator comprises: a pulse-width modulator (PWM) that generates a pulsed signal; a switch operable to selectively connect the regulator to a DC power supply in response to the pulsed signal and output a pulsed output DC signal; a filter for filtering out high frequency noise from the pulsed output DC signal and generating a regulated output signal; an integrator for comparing the pulsed output DC signal with a reference voltage signal and generating an error signal for input to the PWM; a subtractor operable to subtract the reference voltage signal from the filtered output signal to generate an error feedback signal; and an adder operable to add the error feedback signal to the error signal for input to the pulse-width modulator in order to suppress voltage peaks in the filtered output signal.

    摘要翻译： 公开了用于抑制降压调节器中的峰值电压的系统和方法。 一方面，降压调节器包括：产生脉冲信号的脉冲宽度调制器（PWM）; 开关，其可操作以响应于脉冲信号选择性地将调节器连接到DC电源并输出脉冲输出DC信号; 用于从脉冲输出DC信号滤除高频噪声并产生调节输出信号的滤波器; 用于将脉冲输出DC信号与参考电压信号进行比较并产生用于输入到PWM的误差信号的积分器; 减法器，用于从滤波的输出信号中减去参考电压信号以产生误差反馈信号; 以及加法器，用于将误差反馈信号添加到误差信号以输入到脉宽调制器，以便抑制经滤波的输出信号中的电压峰值。

    Audio ground switch channel crosstalk cancellation technique
    8.
    发明授权
    Audio ground switch channel crosstalk cancellation technique 有权

    公开(公告)号：US12047758B2

    公开(公告)日：2024-07-23

    申请号：US17580505

    申请日：2022-01-20

    申请人： QUALCOMM Incorporated

    发明人： Vijayakumar Dhanasekaran

    IPC分类号： H04R5/04 ,  H03F3/45 ,  H04R3/04

    CPC分类号： H04R5/04 ,  H04R3/04 ,  H03F3/45475 ,  H04R2420/03

    摘要： An aspect of the disclosure relates to an apparatus, including an audio interface including first and second outputs; a crosstalk cancelling circuit including first and second inputs coupled to the first and second outputs of the audio interface, respectively; a first summer including a first input coupled to the first output of the audio interface and a second input coupled to a first output of the crosstalk cancelling circuit; a second summer including a first input coupled to the second output of the audio interface and a second input coupled to a second output of the crosstalk cancelling circuit; a first digital to analog converter (DAC) including an input coupled to an output of the first summer; and a second DAC including an input coupled to an output of the second summer.

    Audio non-linearity cancellation for switches for audio and other applications
    9.
    发明授权
    Audio non-linearity cancellation for switches for audio and other applications 有权

    公开(公告)号：US11848696B2

    公开(公告)日：2023-12-19

    申请号：US17974030

    申请日：2022-10-26

    申请人： QUALCOMM Incorporated

    发明人： Kshitij Yadav ,  Vijayakumar Dhanasekaran

    IPC分类号： H04B1/40 ,  H03F3/185 ,  H03F3/193

    CPC分类号： H04B1/40 ,  H03F3/185 ,  H03F3/193 ,  H03F2200/03 ,  H03F2200/451

    摘要： 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.