公开(公告)号：US08115542B2

公开(公告)日：2012-02-14

申请号：US12857855

申请日：2010-08-17

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/38

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。

公开(公告)号：US20090174478A1

公开(公告)日：2009-07-09

申请号：US12285710

申请日：2008-10-14

申请人： Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： In a class-D amplifier, the input signal is compared with a carrier signal to generate a basic PWM signal, the PWM signal is then sent to a pulse processing unit, and by comparing with a basic periodic signal, half-width of the output PWM signal is extracted. Then, in the pulse processing unit, the half-width PWM pulse signal is used to generate a complete pulse whose width equals to the output PWM signal. The output power of the class-D amplifier can be kept as large as that by using differential input signals although the input signal is single-end and the entire signal processing path is kept single-ended.

摘要翻译： 在D类放大器中，将输入信号与载波信号进行比较以产生基本PWM信号，然后将PWM信号发送到脉冲处理单元，并且通过与基本周期信号进行比较，输出的半宽度 提取PWM信号。 然后，在脉冲处理单元中，半宽度PWM脉冲信号用于产生宽度等于输出PWM信号的完整脉冲。 尽管输入信号为单端，整个信号处理路径保持单端，D类放大器的输出功率可以保持与使用差分输入信号一样大。

公开(公告)号：US07944289B2

公开(公告)日：2011-05-17

申请号：US12585917

申请日：2009-09-29

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo

IPC分类号： H03F3/38

CPC分类号： H03F1/26 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/351

摘要： For minimum pulse generation in a class-D amplifier, a trapezoid switching waveform shape is used to replace the tradition triangle type to generate PWM pulses. Two voltages are compared with a sawtooth wave signal to generate the trapezoid waveform signal and a constant pulse width signal. An audio input signal is compared with the trapezoid waveform signal to generate a pulse width modulation signal, and either the pulse width modulation signal or the constant pulse width signal is used for driving a load at an output of the class-D amplifier. Flexible minimum pulse width could be obtained by offsetting one of the two voltages in generation of the constant pulse width signal.

摘要翻译： 为了在D类放大器中产生最小的脉冲，采用梯形切换波形来替代传统的三角形类型以产生PWM脉冲。 将两个电压与锯齿波信号进行比较，以产生梯形波形信号和恒定的脉冲宽度信号。 将音频输入信号与梯形波形信号进行比较以产生脉宽调制信号，并且使用脉宽调制信号或恒定脉冲宽度信号来驱动D类放大器的输出端的负载。 可以通过在产生恒定脉冲宽度信号时抵消两个电压中的一个来获得灵活的最小脉冲宽度。

公开(公告)号：US07911273B2

公开(公告)日：2011-03-22

申请号：US12382762

申请日：2009-03-24

申请人： Jing-Meng Liu ,  Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Jing-Meng Liu ,  Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/217

CPC分类号： H03F3/2173 ,  H03F1/26 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/351

摘要： A switching amplifier has a network including current sources and resistors connected to the two output terminals of the H-bridge of the switching amplifier, to provide a small current to the load connected between the two output terminals at zero input, whereby the common mode voltage bouncing is reduced and the switching amplifier has less power consumption and reduced electro-magnetic interference.

摘要翻译： 开关放大器具有包括连接到开关放大器的H桥的两个输出端的电流源和电阻器的网络，以在零输入处向连接在两个输出端子之间的负载提供小电流，由此共模电压 弹跳减少，开关放大器功耗更低，电磁干扰减少。

公开(公告)号：US07741902B2

公开(公告)日：2010-06-22

申请号：US12285710

申请日：2008-10-14

申请人： Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/38

CPC分类号： H03F3/217

摘要： In a class-D amplifier, the input signal is compared with a carrier signal to generate a basic PWM signal, the PWM signal is then sent to a pulse processing unit, and by comparing with a basic periodic signal, half-width of the output PWM signal is extracted. Then, in the pulse processing unit, the half-width PWM pulse signal is used to generate a complete pulse whose width equals to the output PWM signal. The output power of the class-D amplifier can be kept as large as that by using differential input signals although the input signal is single-end and the entire signal processing path is kept single-ended.

摘要翻译： 在D类放大器中，将输入信号与载波信号进行比较以产生基本PWM信号，然后将PWM信号发送到脉冲处理单元，并且通过与基本周期信号进行比较，输出的半宽度 提取PWM信号。 然后，在脉冲处理单元中，半宽度PWM脉冲信号用于产生宽度等于输出PWM信号的完整脉冲。 尽管输入信号为单端，整个信号处理路径保持单端，D类放大器的输出功率可以保持与使用差分输入信号一样大。

公开(公告)号：US20090243722A1

公开(公告)日：2009-10-01

申请号：US12382762

申请日：2009-03-24

申请人： Jing-Meng Liu ,  Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Jing-Meng Liu ,  Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/217

CPC分类号： H03F3/2173 ,  H03F1/26 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/351

摘要： A switching amplifier has a network including current sources and resistors connected to the two output terminals of the H-bridge of the switching amplifier, to provide a small current to the load connected between the two output terminals at zero input, whereby the common mode voltage bouncing is reduced and the switching amplifier has less power consumption and reduced electro-magnetic interference.

摘要翻译： 开关放大器具有包括连接到开关放大器的H桥的两个输出端的电流源和电阻器的网络，以在零输入处向连接在两个输出端子之间的负载提供小电流，由此共模电压 弹跳减少，开关放大器功耗更低，电磁干扰减少。

公开(公告)号：US20090080676A1

公开(公告)日：2009-03-26

申请号：US12229369

申请日：2008-08-22

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

IPC分类号： H04R3/00

CPC分类号： H04S3/008 ,  H04R5/04 ,  H04R19/02 ,  H04R2420/03

摘要： The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal, and mixing them by modulation; a digital to analog converter for converting the output of the digital modulation encoder to an analog signal; a transformer for adjusting the voltage amplitude of the analog signal; and a demodulator for demodulating the adjusted analog signal to driver a speaker.

摘要翻译： 本发明公开了一种用于静电扬声器的驱动电路，包括：数字调制编码器，用于接收数字音频信号和固定频率脉冲信号，并通过调制进行混频; 数模转换器，用于将数字调制编码器的输出转换为模拟信号; 用于调整模拟信号的电压幅度的变压器; 以及用于将调整后的模拟信号解调为扬声器的解调器。

公开(公告)号：US08064620B2

公开(公告)日：2011-11-22

申请号：US12229369

申请日：2008-08-22

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

IPC分类号： H04R3/00

CPC分类号： H04S3/008 ,  H04R5/04 ,  H04R19/02 ,  H04R2420/03

摘要： The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal, and mixing them by modulation; a digital to analog converter for converting the output of the digital modulation encoder to an analog signal; a transformer for adjusting the voltage amplitude of the analog signal; and a demodulator for demodulating the adjusted analog signal to driver a speaker.

摘要翻译： 本发明公开了一种用于静电扬声器的驱动电路，包括：数字调制编码器，用于接收数字音频信号和固定频率脉冲信号，并通过调制进行混频; 数模转换器，用于将数字调制编码器的输出转换为模拟信号; 用于调整模拟信号的电压幅度的变压器; 以及用于将调整后的模拟信号解调为扬声器的解调器。

公开(公告)号：US08755539B2

公开(公告)日：2014-06-17

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：US20100079208A1

公开(公告)日：2010-04-01

申请号：US12585917

申请日：2009-09-29

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo

IPC分类号： H03F3/217

CPC分类号： H03F1/26 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/351

摘要： For minimum pulse generation in a class-D amplifier, a trapezoid switching waveform shape is used to replace the tradition triangle type to generate PWM pulses. Two voltages are compared with a sawtooth wave signal to generate the trapezoid waveform signal and a constant pulse width signal. An audio input signal is compared with the trapezoid waveform signal to generate a pulse width modulation signal, and either the pulse width modulation signal or the constant pulse width signal is used for driving a load at an output of the class-D amplifier. Flexible minimum pulse width could be obtained by offsetting one of the two voltages in generation of the constant pulse width signal.

摘要翻译： 为了在D类放大器中产生最小的脉冲，采用梯形切换波形来替代传统的三角形类型以产生PWM脉冲。 将两个电压与锯齿波信号进行比较，以产生梯形波形信号和恒定的脉冲宽度信号。 将音频输入信号与梯形波形信号进行比较以产生脉宽调制信号，并且使用脉宽调制信号或恒定脉冲宽度信号来驱动D类放大器的输出端的负载。 可以通过在产生恒定脉冲宽度信号时抵消两个电压中的一个来获得灵活的最小脉冲宽度。