公开(公告)号：US20100232628A1

公开(公告)日：2010-09-16

申请号：US12401905

申请日：2009-03-11

Applicant: Hongbo Zhang ,  Vincent Fong ,  Jing Xu ,  Yuling Khang

Inventor： Hongbo Zhang ,  Vincent Fong ,  Jing Xu ,  Yuling Khang

IPC: H03F99/00

CPC classification number: H03F1/305 ,  H03F3/217

Abstract: In one embodiment the present invention includes a method for starting up a class D amplifier. The method comprises increasing, gating, and driving. The increasing includes increasing a duty cycle of a pulse train from a first duty cycle to a second duty cycle. The gating includes gating a signal based on the increasing of the duty cycle. The gating results in a gated signal. The driving includes driving an output signal from the gated signal to charge an output capacitor. The output capacitor is coupled to a speaker. The increasing of the duty cycle contributes to the charging of the output capacitor such that switching sounds detectable by the human ear are reduced.

Abstract translation: 在一个实施例中，本发明包括用于启动D类放大器的方法。 该方法包括增加，门控和驾驶。 增加包括将脉冲串从第一占空比增加到第二占空比的占空比。 门控包括基于占空比的增加来门控信号。 门控产生门控信号。 驱动包括驱动来自门控信号的输出信号以对输出电容器充电。 输出电容耦合到扬声器。 占空比的增加有助于输出电容器的充电，使得由人耳可检测的开关声音减小。

公开(公告)号：US08265303B2

公开(公告)日：2012-09-11

申请号：US12401905

申请日：2009-03-11

Applicant: Hongbo Zhang ,  Vincent Fong ,  Jing Xu ,  Yuling Khang

Inventor： Hongbo Zhang ,  Vincent Fong ,  Jing Xu ,  Yuling Khang

IPC: H04B1/00

CPC classification number: H03F1/305 ,  H03F3/217

Abstract: In one embodiment the present invention includes a method for starting up a class D amplifier. The method comprises increasing, gating, and driving. The increasing includes increasing a duty cycle of a pulse train from a first duty cycle to a second duty cycle. The gating includes gating a signal based on the increasing of the duty cycle. The gating results in a gated signal. The driving includes driving an output signal from the gated signal to charge an output capacitor. The output capacitor is coupled to a speaker. The increasing of the duty cycle contributes to the charging of the output capacitor such that switching sounds detectable by the human ear are reduced.

Abstract translation: 在一个实施例中，本发明包括用于启动D类放大器的方法。 该方法包括增加，门控和驾驶。 增加包括将脉冲串从第一占空比增加到第二占空比的占空比。 门控包括基于占空比的增加来门控信号。 门控产生门控信号。 驱动包括驱动来自门控信号的输出信号以对输出电容器充电。 输出电容耦合到扬声器。 占空比的增加有助于输出电容器的充电，使得由人耳可检测的开关声音减小。