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    Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers
    3.
    发明授权
    Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers 有权
    降低开关放大器中基板电压跳变和尖峰电压的方法和装置

    公开(公告)号：US07649414B2

    公开(公告)日：2010-01-19

    申请号：US11940691

    申请日：2007-11-15

    申请人： Cetin Kaya ,  Klaus Krogsgaard ,  Michael Pate

    发明人： Cetin Kaya ,  Klaus Krogsgaard ,  Michael Pate

    IPC分类号： H03F3/217 ,  H03F1/52

    CPC分类号： H03F3/217

    摘要： Methods and apparatus to reduce voltage bounces and spike voltages in switching amplifiers are disclosed. An example apparatus to reduce spike voltages in a switching amplifier disclosed herein comprises an input to sense an output voltage of the switching amplifier, and a pull-down circuit to electrically couple the apparatus with a transistor in the switching amplifier, wherein the pull-down circuit is configured to vary in strength based on the output voltage sensed by the input.

    摘要翻译： 公开了减少开关放大器中的电压跳变和尖峰电压的方法和装置。 用于减少本文公开的开关放大器中的尖峰电压的示例性装置包括用于感测开关放大器的输出电压的输入端和用于将该装置与开关放大器中的晶体管电耦合的下拉电路，其中下拉 电路被配置为基于由输入感测的输出电压而在强度上变化。

    Output Short Circuit and Load Detection
    4.
    发明申请
    Output Short Circuit and Load Detection 有权
    输出短路和负载检测

    公开(公告)号：US20090322426A1

    公开(公告)日：2009-12-31

    申请号：US12165519

    申请日：2008-06-30

    申请人： Flemming Nyboe ,  Klaus Krogsgaard

    发明人： Flemming Nyboe ,  Klaus Krogsgaard

    IPC分类号： H03F3/217 ,  H03F1/52

    CPC分类号： H03F3/187 ,  H03F1/52 ,  H03F3/2171 ,  H03F3/2173

    摘要： One embodiment of an apparatus for testing an amplifier includes an amplifier having a driver and a filter, the filter being connected between an output of the driver and an output of the amplifier. The filter is operable to produce a demodulated output signal from a higher frequency modulated signal at the driver output. The apparatus also includes a voltage level detector connected to the driver output and a control circuit operable to detect at least one fault based on a voltage level measured at the driver output by the voltage level detector.

    摘要翻译： 用于测试放大器的装置的一个实施例包括具有驱动器和滤波器的放大器，滤波器连接在驱动器的输出端和放大器的输出端之间。 滤波器可操作以在驱动器输出处产生来自较高频率调制信号的解调输出信号。 该装置还包括连接到驱动器输出的电压电平检测器和可操作以基于由电压电平检测器输出的驱动器测量的电压电平来检测至少一个故障的控制电路。

    METHODS AND APPARATUS TO REDUCE SUBSTRATE VOLTAGE BOUNCES AND SPIKE VOLTAGES IN SWITCHING AMPLIFIERS
    5.
    发明申请
    METHODS AND APPARATUS TO REDUCE SUBSTRATE VOLTAGE BOUNCES AND SPIKE VOLTAGES IN SWITCHING AMPLIFIERS 有权
    降低开关放大器基板电压和SPIKE电压的方法和设备

    公开(公告)号：US20080061876A1

    公开(公告)日：2008-03-13

    申请号：US11940691

    申请日：2007-11-15

    申请人： Cetin Kaya ,  Klaus Krogsgaard ,  Michael Pate

    发明人： Cetin Kaya ,  Klaus Krogsgaard ,  Michael Pate

    IPC分类号： H03F1/00 ,  H02H3/20

    CPC分类号： H03F3/217

    摘要： Methods and apparatus to reduce voltage bounces and spike voltages in switching amplifiers are disclosed. An example apparatus to reduce spike voltages in a switching amplifier disclosed herein comprises an input to sense an output voltage of the switching amplifier, and a pull-down circuit to electrically couple the apparatus with a transistor in the switching amplifier, wherein the pull-down circuit is configured to vary in strength based on the output voltage sensed by the input.

    摘要翻译： 公开了减少开关放大器中的电压跳变和尖峰电压的方法和装置。 用于减少本文公开的开关放大器中的尖峰电压的示例性装置包括用于感测开关放大器的输出电压的输入端和用于将该装置与开关放大器中的晶体管电耦合的下拉电路，其中下拉 电路被配置为基于由输入感测的输出电压而在强度上变化。

    Method and system for transitioning between operation states in an output system
    6.
    发明授权
    Method and system for transitioning between operation states in an output system 有权
    在输出系统中在运行状态之间转换的方法和系统

    公开(公告)号：US07554390B1

    公开(公告)日：2009-06-30

    申请号：US11961144

    申请日：2007-12-20

    申请人： Asit Shankar ,  Klaus Krogsgaard

    发明人： Asit Shankar ,  Klaus Krogsgaard

    IPC分类号： H03F3/38

    CPC分类号： H03F3/217 ,  H03F3/393 ,  H03F3/68

    摘要： A closed loop amplifier system comprising a modulator that provides a pulse-width modulated (PWM) output signal based on an input signal, the modulator having a variable closed loop transfer function. The system also comprises a ramp generator that provides a ramp signal to the modulator, the variable closed loop transfer function of the modulator varying as a function of the ramp signal. The system further comprises a controller that controls the ramp generator to provide the ramp signal to adjust the variable closed loop transfer function during transitions between operating states of the amplifier system.

    摘要翻译： 一种闭环放大器系统，包括基于输入信号提供脉宽调制（PWM）输出信号的调制器，所述调制器具有可变闭环传递函数。 该系统还包括斜坡发生器，该斜坡发生器向调制器提供斜坡信号，调制器的可变闭环传递函数作为斜坡信号的函数而变化。 该系统还包括控制器，其控制斜坡发生器以在放大器系统的操作状态之间的转换期间提供斜坡信号来调节可变闭环传递函数。

    Method and Apparatus for Diminishing Mismatch Effects Between Switched Signals
    7.
    发明申请
    Method and Apparatus for Diminishing Mismatch Effects Between Switched Signals 有权
    用于减少切换信号之间不匹配影响的方法和装置

    公开(公告)号：US20090066413A1

    公开(公告)日：2009-03-12

    申请号：US12196496

    申请日：2008-08-22

    申请人： Klaus Krogsgaard ,  Eric Labbe

    发明人： Klaus Krogsgaard ,  Eric Labbe

    IPC分类号： H03F3/68

    CPC分类号： H03F3/2173

    摘要： A circuit for diminishing mismatch effects between at least two switched signals includes at least three processing circuits configured to receive at least two switched signals such that each of the switched signals is associated with one of the processing circuits leaving at least one unassociated processing circuit. A controller circuit is configured to switch one of the switched signals to be associated with one of the unassociated processing circuit(s) upon at least one specified interval such as, for example, at a transition of the switched signal. The circuit may be incorporated into an audio amplifier configured to provide information carried on the switched signals to one or more speakers that provide an audio output. A one-processor circuit approach includes switching frames of a switched signal between positive and negative inputs of a processor circuit to average out errors introduced by the processor circuit.

    摘要翻译： 用于减少至少两个切换信号之间的失配效应的电路包括至少三个处理电路，其被配置为接收至少两个切换信号，使得每个切换信号与处理电路中的一个相关联，留下至少一个未关联的处理电路。 控制器电路被配置为在至少一个指定的间隔（例如在切换的信号的转换）之间切换要与非关联处理电路之一相关联的切换信号中的一个。 电路可以并入音频放大器中，音频放大器被配置为将开关信号上承载的信息提供给提供音频输出的一个或多个扬声器。 单处理器电路方法包括在处理器电路的正输入和负输入之间切换切换信号的帧，以平均处理器电路引入的误差。

    Method and apparatus for diminishing mismatch effects between switched signals
    8.
    发明授权
    Method and apparatus for diminishing mismatch effects between switched signals 有权
    减少开关信号之间的失配效应的方法和装置

    公开(公告)号：US08284963B2

    公开(公告)日：2012-10-09

    申请号：US12196496

    申请日：2008-08-22

    申请人： Klaus Krogsgaard ,  Eric Labbe

    发明人： Klaus Krogsgaard ,  Eric Labbe

    IPC分类号： H02B1/00 ,  H03F99/00 ,  H03F1/02 ,  H03F3/38 ,  H03F3/68

    CPC分类号： H03F3/2173

    摘要： A circuit for diminishing mismatch effects between at least two switched signals includes at least three processing circuits configured to receive at least two switched signals such that each of the switched signals is associated with one of the processing circuits leaving at least one unassociated processing circuit. A controller circuit is configured to switch one of the switched signals to be associated with one of the unassociated processing circuit(s) upon at least one specified interval such as, for example, at a transition of the switched signal. The circuit may be incorporated into an audio amplifier configured to provide information carried on the switched signals to one or more speakers that provide an audio output. A one-processor circuit approach includes switching frames of a switched signal between positive and negative inputs of a processor circuit to average out errors introduced by the processor circuit.

    摘要翻译： 用于减少至少两个切换信号之间的失配效应的电路包括至少三个处理电路，其被配置为接收至少两个切换信号，使得每个切换信号与处理电路中的一个相关联，留下至少一个未关联的处理电路。 控制器电路被配置为在至少一个指定的间隔（例如在切换的信号的转换）之间切换要与非关联处理电路之一相关联的切换信号中的一个。 电路可以并入音频放大器中，音频放大器被配置为将开关信号上承载的信息提供给提供音频输出的一个或多个扬声器。 单处理器电路方法包括在处理器电路的正输入和负输入之间切换切换信号的帧，以平均处理器电路引入的误差。

    Output short circuit and load detection
    9.
    发明授权
    Output short circuit and load detection 有权
    输出短路和负载检测

    公开(公告)号：US07889011B2

    公开(公告)日：2011-02-15

    申请号：US12165519

    申请日：2008-06-30

    申请人： Flemming Nyboe ,  Klaus Krogsgaard

    发明人： Flemming Nyboe ,  Klaus Krogsgaard

    IPC分类号： H03F1/52

    CPC分类号： H03F3/187 ,  H03F1/52 ,  H03F3/2171 ,  H03F3/2173

    摘要： One embodiment of an apparatus for testing an amplifier includes an amplifier having a driver and a filter, the filter being connected between an output of the driver and an output of the amplifier. The filter is operable to produce a demodulated output signal from a higher frequency modulated signal at the driver output. The apparatus also includes a voltage level detector connected to the driver output and a control circuit operable to detect at least one fault based on a voltage level measured at the driver output by the voltage level detector.

    摘要翻译： 用于测试放大器的装置的一个实施例包括具有驱动器和滤波器的放大器，滤波器连接在驱动器的输出端和放大器的输出端之间。 滤波器可操作以在驱动器输出处产生来自较高频率调制信号的解调输出信号。 该装置还包括连接到驱动器输出的电压电平检测器和可操作以基于由电压电平检测器输出的驱动器测量的电压电平来检测至少一个故障的控制电路。

    METHOD AND SYSTEM FOR TRANSITIONING BETWEEN OPERATION STATES IN AN OUTPUT SYSTEM
    10.
    发明申请
    METHOD AND SYSTEM FOR TRANSITIONING BETWEEN OPERATION STATES IN AN OUTPUT SYSTEM 有权
    用于在输出系统中操作状态之间进行转换的方法和系统

    公开(公告)号：US20090160547A1

    公开(公告)日：2009-06-25

    申请号：US11961144

    申请日：2007-12-20

    申请人： Asit Shankar ,  Klaus Krogsgaard

    发明人： Asit Shankar ,  Klaus Krogsgaard

    IPC分类号： H03F3/38 ,  H03F3/217

    CPC分类号： H03F3/217 ,  H03F3/393 ,  H03F3/68

    摘要： A closed loop amplifier system comprising a modulator that provides a pulse-width modulated (PWM) output signal based on an input signal, the modulator having a variable closed loop transfer function. The system also comprises a ramp generator that provides a ramp signal to the modulator, the variable closed loop transfer function of the modulator varying as a function of the ramp signal. The system further comprises a controller that controls the ramp generator to provide the ramp signal to adjust the variable closed loop transfer function during transitions between operating states of the amplifier system.

    摘要翻译： 一种闭环放大器系统，包括基于输入信号提供脉宽调制（PWM）输出信号的调制器，所述调制器具有可变闭环传递函数。 该系统还包括斜坡发生器，该斜坡发生器向调制器提供斜坡信号，调制器的可变闭环传递函数作为斜坡信号的函数而变化。 该系统还包括控制器，其控制斜坡发生器以在放大器系统的操作状态之间的转换期间提供斜坡信号来调节可变闭环传递函数。