Close-loop class-D audio amplifier and control method thereof
    1.
    发明授权
    Close-loop class-D audio amplifier and control method thereof 有权
    闭环D类音频放大器及其控制方法

    公开(公告)号:US07728666B2

    公开(公告)日:2010-06-01

    申请号:US12169539

    申请日:2008-07-08

    IPC分类号: H03F3/217

    CPC分类号: H03F3/217

    摘要: The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

    摘要翻译: 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中,放大器将输出节点处的信号反馈到比较器的反相输入,并向比较器的非反相输入端提供高频三角波信号。 此外,比较器的非反相输入可以耦合到偏移电压,而比较器的反相输入可以耦合到固定频率矩形波信号,从输出级导出的反馈信号和 输入信号。 在使用中,开关频率可以至少基本上固定,以便减少由电磁干扰(EMI)引起的对系统的影响。 此外,控制电路简单,一些设备可以集成。

    CLOSE-LOOP CLASS-D AUDIO AMPLIFIER AND CONTROL METHOD THEREOF
    2.
    发明申请
    CLOSE-LOOP CLASS-D AUDIO AMPLIFIER AND CONTROL METHOD THEREOF 有权
    闭环音频放大器及其控制方法

    公开(公告)号:US20090045873A1

    公开(公告)日:2009-02-19

    申请号:US12169539

    申请日:2008-07-08

    IPC分类号: H03F3/217

    CPC分类号: H03F3/217

    摘要: The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

    摘要翻译: 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中,放大器将输出节点处的信号反馈到比较器的反相输入,并向比较器的非反相输入端提供高频三角波信号。 此外,比较器的非反相输入可以耦合到偏移电压,而比较器的反相输入可以耦合到固定频率矩形波信号,从输出级导出的反馈信号和 输入信号。 在使用中,开关频率可以至少基本上固定,以便减少由电磁干扰(EMI)引起的对系统的影响。 此外,控制电路简单,一些设备可以集成。

    Close-loop Class-D audio amplifier and control method thereof
    3.
    发明授权
    Close-loop Class-D audio amplifier and control method thereof 有权
    闭环D类音频放大器及其控制方法

    公开(公告)号:US08004360B2

    公开(公告)日:2011-08-23

    申请号:US12766792

    申请日:2010-04-23

    IPC分类号: H03F3/217

    CPC分类号: H03F3/217

    摘要: The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

    摘要翻译: 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中,放大器将输出节点处的信号反馈到比较器的反相输入,并向比较器的非反相输入端提供高频三角波信号。 此外,比较器的非反相输入可以耦合到偏移电压,而比较器的反相输入可以耦合到固定频率矩形波信号,从输出级导出的反馈信号和 输入信号。 在使用中,开关频率可以至少基本上固定,以便减少由电磁干扰(EMI)引起的对系统的影响。 此外,控制电路简单,一些设备可以集成。

    Close-loop class-D audio amplifier and control method thereof
    4.
    再颁专利
    Close-loop class-D audio amplifier and control method thereof 有权
    闭环D类音频放大器及其控制方法

    公开(公告)号:USRE42846E1

    公开(公告)日:2011-10-18

    申请号:US12968216

    申请日:2010-12-14

    IPC分类号: H03F3/217

    CPC分类号: H03F3/217

    摘要: The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

    摘要翻译: 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中,放大器将输出节点处的信号反馈到比较器的反相输入,并向比较器的非反相输入端提供高频三角波信号。 此外,比较器的非反相输入可以耦合到偏移电压,而比较器的反相输入可以耦合到固定频率矩形波信号,从输出级导出的反馈信号和 输入信号。 在使用中,开关频率可以至少基本上固定,以便减少由电磁干扰(EMI)引起的对系统的影响。 此外,控制电路简单,一些设备可以集成。

    CLOSE-LOOP CLASS-D AUDIO AMPLIFIER AND CONTROL METHOD THEREOF
    5.
    发明申请
    CLOSE-LOOP CLASS-D AUDIO AMPLIFIER AND CONTROL METHOD THEREOF 有权
    闭环音频放大器及其控制方法

    公开(公告)号:US20100264985A1

    公开(公告)日:2010-10-21

    申请号:US12766792

    申请日:2010-04-23

    IPC分类号: H03F3/217

    CPC分类号: H03F3/217

    摘要: The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

    摘要翻译: 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中,放大器将输出节点处的信号反馈到比较器的反相输入,并向比较器的非反相输入端提供高频三角波信号。 此外,比较器的非反相输入可以耦合到偏移电压,而比较器的反相输入可以耦合到固定频率矩形波信号,从输出级导出的反馈信号和 输入信号。 在使用中,开关频率可以至少基本上固定,以便减少由电磁干扰(EMI)引起的对系统的影响。 此外,控制电路简单,一些设备可以集成。

    Power systems for driving light emitting diodes and associated methods of control
    6.
    发明授权
    Power systems for driving light emitting diodes and associated methods of control 有权
    用于驱动发光二极管的电力系统和相关联的控制方法

    公开(公告)号:US08907592B2

    公开(公告)日:2014-12-09

    申请号:US13048730

    申请日:2011-03-15

    IPC分类号: H05B37/02 H05B33/08

    摘要: Embodiments of LED driver circuits and the associated methods are disclosed herein. In one embodiment, the LED driver circuit comprises a switch-mode converter, a controller, a feedback circuit, and a gating circuit. The feedback circuit includes a current balance circuit. The gating circuit is responsive to both a current feedback signal and a voltage feedback signal and is configured to select one of them as the feedback signal.

    摘要翻译: LED驱动器电路和相关方法的实施例在此公开。 在一个实施例中,LED驱动器电路包括开关模式转换器,控制器,反馈电路和门控电路。 反馈电路包括电流平衡电路。 门控电路响应于电流反馈信号和电压反馈信号,并且被配置为选择它们中的一个作为反馈信号。

    BRIDGELESS PFC CONVERTER AND THE METHOD THEREOF
    7.
    发明申请
    BRIDGELESS PFC CONVERTER AND THE METHOD THEREOF 审中-公开
    无桥PFC转换器及其方法

    公开(公告)号:US20120293141A1

    公开(公告)日:2012-11-22

    申请号:US13474545

    申请日:2012-05-17

    IPC分类号: G05F1/70

    摘要: A bridgeless PFC (power factor correction) converter with improved efficiency is disclosed. The bridgeless PFC converter comprises: input terminals configured to receive an input AC power supply; an output terminal configured to provide power supply; a high frequency bridge arm comprising a first switch and a third switch coupled between the output terminal and a ground node; a low frequency bridge arm comprising a second switch and a fourth switch coupled between the output terminal and the ground node; an inductor coupled between the input AC power supply and the high frequency bridge arm; and a control circuit configured to control the switching of switches in the high frequency bridge arm and the low frequency bridge arm.

    摘要翻译: 公开了一种提高效率的无桥PFC(功率因数校正)转换器。 所述无桥PFC转换器包括:被配置为接收输入AC电源的输入端; 输出端子,被配置为提供电源; 高频桥臂,包括耦合在输出端和接地节点之间的第一开关和第三开关; 低频桥臂,包括耦合在所述输出端子和所述接地节点之间的第二开关和第四开关; 耦合在输入交流电源和高频桥臂之间的电感器; 以及控制电路,被配置为控制高频桥臂和低频桥臂中的开关的切换。

    Power converters and associated methods of control
    8.
    发明授权
    Power converters and associated methods of control 有权
    电源转换器和相关的控制方法

    公开(公告)号:US08164218B2

    公开(公告)日:2012-04-24

    申请号:US12505399

    申请日:2009-07-17

    IPC分类号: H02J1/10 G05F1/577

    摘要: SIMO power converters and associated methods of control are disclosed herein. In one embodiment, a method of converting a signal input signal into multiple output signals includes supplying power to a plurality of output terminals based on a signal input signal, detecting a voltage at individual output terminals, determining an arithmetic relationship between the detected voltages of the output terminals, and adjusting the power supplied to the plurality of output terminals based at least in part on the determined arithmetic relationship between the detected voltages of the output terminals.

    摘要翻译: 本文公开了SIMO功率转换器和相关联的控制方法。 在一个实施例中,将信号输入信号转换为多个输出信号的方法包括基于信号输入信号向多个输出端子供电,检测各个输出端子处的电压,确定检测到的电压的算术关系 输出端子,并且至少部分地基于所确定的输出端子的检测电压之间的算术关系来调整提供给多个输出端子的功率。

    Simple protection circuit and adaptive frequency sweeping method for CCFL inverter
    10.
    发明授权
    Simple protection circuit and adaptive frequency sweeping method for CCFL inverter 失效
    CCFL逆变器简单保护电路和自适应扫频方法

    公开(公告)号:US08063570B2

    公开(公告)日:2011-11-22

    申请号:US12166140

    申请日:2008-07-01

    IPC分类号: H05B37/02 H05B41/36

    CPC分类号: H05B41/2855

    摘要: A CCFL inverter circuit integrates a feedback circuit and protection circuit together. For both in-phase and out-of-phase applications, sensed lamp voltages can be used for open lamp and short lamp detection and sensed currents can be used for open lamp detection. The driving circuit adjusts the open lamp frequency by using a duty cycle control signal so that the driving circuit can always achieve the desired lamp voltage gain.

    摘要翻译: CCFL逆变电路将反馈电路和保护电路集成在一起。 对于同相和异相应用,感测的灯电压可用于开灯和短灯检测,并且感测电流可用于开灯检测。 驱动电路通过使用占空比控制信号来调节开路频率,使得驱动电路总能达到期望的灯电压增益。