公开(公告)号：US20110116657A1

公开(公告)日：2011-05-19

申请号：US12947148

申请日：2010-11-16

申请人： PEI-CHENG HUANG ,  JWIN-YEN GUO

发明人： PEI-CHENG HUANG ,  JWIN-YEN GUO

IPC分类号： H04R3/00

CPC分类号： H04R3/00 ,  H04R19/005

摘要： An electrostatic transducer loudspeaker includes a filterless class-D amplifier to modulate an audio input signal to generate a modulated signal containing a PWM switching carrier component, and a transformer directly connected at an output side of the filterless class-D amplifier and directly connected at an input side of an electrostatic transducer, whereby the equivalent capacitance of the electrostatic transducer and the equivalent inductance of the transformer establish a resonance circuit to demodulate the modulated signal to generate an AC voltage to drive the electrostatic transducer.

摘要翻译： 静电传感器扬声器包括无滤波D类放大器，用于调制音频输入信号以产生包含PWM切换载波分量的调制信号，以及直接连接在无滤波D类放大器的输出侧并直接连接到 静电换能器的等效电容和变压器的等效电感建立了谐振电路，以解调调制信号以产生AC电压来驱动静电换能器。

公开(公告)号：US20110084760A1

公开(公告)日：2011-04-14

申请号：US12898962

申请日：2010-10-06

申请人： JWIN-YEN GUO ,  TSUNG-NAN WU

发明人： JWIN-YEN GUO ,  TSUNG-NAN WU

IPC分类号： H03G3/20

CPC分类号： H03F1/0244 ,  H03F3/45475 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45591 ,  H03F2203/45594

摘要： A highly efficient class-G amplifier includes an amplifier circuit coupled between a positive power rail and a negative power rail to amplify an audio input signal of the class-G amplifier, and a boost inverting power converter to convert a supply voltage to a positive rail voltage and a negative rail voltage on the positive and negative power rails. The boost inverting power converter includes a boost inverting power stage coupled to the positive and negative power rails, and a controller to switch the boost inverting power stage between a boost mode and an inverting mode. An audio level detector detects the audio input signal for the controller to adjust the positive and negative rail voltages. The class-G amplifier has higher efficiency and requires lower cost because it does not need a charge pump.

摘要翻译： 一种高效率的G类放大器包括一个耦合在正电源轨和负电源轨之间的放大器电路，用于放大G类放大器的音频输入信号，以及升压反相功率转换器，将电源电压转换为正轨 正负电源轨上的电压和负轨电压。 升压反相功率转换器包括耦合到正和负电源轨的升压反相功率级以及在升压模式和反相模式之间切换升压反相功率级的控制器。 音频电平检测器检测用于控制器的音频输入信号，以调整正负极轨电压。 G类放大器具有更高的效率，并且要求较低的成本，因为它不需要电荷泵。

公开(公告)号：US20110043283A1

公开(公告)日：2011-02-24

申请号：US12857855

申请日：2010-08-17

申请人： PEI-CHUNG HUANG ,  JWIN-YEN GUO ,  SHAO-MING SUN

发明人： PEI-CHUNG HUANG ,  JWIN-YEN GUO ,  SHAO-MING SUN

IPC分类号： H03F1/00 ,  H03F3/217

CPC分类号： H03F3/217

摘要： A class-D amplifier includes a ramp generator to provide a ramp signal having a frequency varying with an audio input signal, and a modulator to convert the audio input signal to a pulse width modulation signal according to the ramp signal for a driver to drive a load device. The varying frequency of the ramp signal will cause the frequency of the pulse width modulation signal unfixed and consequently improves EMI issue.

摘要翻译： D类放大器包括：斜坡发生器，用于提供具有随音频输入信号变化的频率的斜坡信号;以及调制器，用于根据用于驾驶员的驱动器的斜坡信号将音频输入信号转换为脉宽调制信号 负载设备 斜坡信号的变化频率将导致脉宽调制信号的频率不固定，从而改善EMI问题。