公开(公告)号：US20090041266A1

公开(公告)日：2009-02-12

申请号：US12222396

申请日：2008-08-08

Applicant: Jwin-Yen Guo ,  Liang-Pin Tai ,  Shao-Ming Chang

Inventor： Jwin-Yen Guo ,  Liang-Pin Tai ,  Shao-Ming Chang

IPC: H03G5/16

CPC classification number: H03F3/217

Abstract: An electrostatic loudspeaker driver includes a class-D amplifier and a demodulator circuit. The class-D amplifier is operated with a PWM signal, creating an amplified digital signal according to an input signal. A low-pass filter in the demodulator circuit filters out the PWM carrier frequency in the digital signal and retrieves an audio signal therefrom. The efficiency is improved significantly and heat sink is no longer needed.

Abstract translation: 静电扬声器驱动器包括D类放大器和解调器电路。 D类放大器采用PWM信号工作，根据输入信号产生放大的数字信号。 解调器电路中的低通滤波器滤除数字信号中的PWM载波频率并从中检索音频信号。 效率显着提高，不再需要散热片。

公开(公告)号：US20090039856A1

公开(公告)日：2009-02-12

申请号：US11905196

申请日：2007-09-28

Applicant: Ko-Cheng Wang ,  Liang-Pin Tai

Inventor： Ko-Cheng Wang ,  Liang-Pin Tai

IPC: G05F1/44 ,  G05F1/02

CPC classification number: H02M3/156 ,  H02M2001/0009

Abstract: A DCR detecting circuit is parallel connected to the inductor of a self-clocking PWM buck converter which performs a trigger control of a PWM signal by an output feedback, to detect the current signal on the inductor to provide a large enough ripple to be combined into the output feedback, so as to enhance the system stability, while remains the small output ripple, without additional power loss.

Abstract translation: DCR检测电路并联到自定时PWM降压转换器的电感器，其通过输出反馈执行PWM信号的触发控制，以检测电感器上的电流信号，以提供足够大的纹波以被组合 输出反馈，从而提高系统的稳定性，同时保持小输出纹波，无需额外的功率损耗。

公开(公告)号：US07446591B2

公开(公告)日：2008-11-04

申请号：US11822169

申请日：2007-07-03

Applicant: Liang-Pin Tai ,  Jiun-Chiang Chen

Inventor： Liang-Pin Tai ,  Jiun-Chiang Chen

IPC: H03K17/687

CPC classification number: H03K17/6871 ,  H03K17/693

Abstract: A switching circuit uses multiple common-drain JFETs to serve as the low-side switches of the switching circuit, and each of the low-side JFET is coupled between a high-side switch and a power node. Since a JFET can endure high voltage at both drain side and source side, and has good heat dissipation capability at drain side, the drain of the low-side JFET is coupled to the power node to enhance the heat dissipation capability and accordingly, all the low-side JFETs are allowed to be packaged in a same package to reduce the PCB layout area.

Abstract translation: 开关电路使用多个公共漏极JFET作为开关电路的低侧开关，并且每个低侧JFET耦合在高侧开关和功率节点之间。 由于JFET可以在漏极侧和源极侧承受高电压，并且在漏极侧具有良好的散热能力，因此低边JFET的漏极耦合到电源节点以增强散热能力，因此， 低边JFET可以封装在相同的封装中，以减少PCB布局面积。

公开(公告)号：US07230406B2

公开(公告)日：2007-06-12

申请号：US11210812

申请日：2005-08-25

Applicant: Kent Huang ,  Liang-Pin Tai

Inventor： Kent Huang ,  Liang-Pin Tai

IPC: G05F1/00

CPC classification number: H02M3/158 ,  H02M3/1584

Abstract: A fixed-frequency current mode converter comprises a power stage to produce an inductor current and an output voltage, an error amplifier to generate an error signal from the difference between the output voltage and a reference voltage varied with the inductor current, a comparator to compare the error signal with a ramp signal varied with the inductor current to generate a comparison signal, and a PWM generator to generate a PWM signal in response to a fixed-frequency clock and the comparison signal to drive the power stage. A second comparator is further comprised to compare the error signal with a second reference voltage varied with the inductor current, and generates a second comparison signal to reset the clock when the error signal is lower than the second reference voltage.

Abstract translation: 固定频率电流模式转换器包括产生电感电流和输出电压的功率级，误差放大器，根据输出电压和与电感电流变化的参考电压之间的差异产生误差信号，比较器进行比较 具有斜坡信号的误差信号随着电感器电流而变化以产生比较信号，以及PWM发生器，以响应于固定频率时钟和比较信号产生PWM信号以驱动功率级。 还包括第二比较器，用于将误差信号与随电感器电流变化的第二参考电压进行比较，并且当误差信号低于第二参考电压时产生第二比较信号以复位时钟。

公开(公告)号：US20070064454A1

公开(公告)日：2007-03-22

申请号：US11487388

申请日：2006-07-17

Applicant: Isaac Chen ,  An-Tung Chen ,  Liang-Pin Tai

Inventor： Isaac Chen ,  An-Tung Chen ,  Liang-Pin Tai

IPC: H02M1/00

CPC classification number: H02M1/36 ,  H02M3/156 ,  H02M2001/0025 ,  Y10S323/901

Abstract: A circuit and method for soft start of a system compare a feedback signal produced from an output voltage of the system with a ramp signal to generate a comparison signal, and enables the system once the comparison signal indicating the ramp signal reaches the feedback signal, such that the output voltage becomes active from a residual voltage toward a target level.

Abstract translation: 用于软启动的系统的电路和方法将从系统的输出电压产生的反馈信号与斜坡信号进行比较，以产生比较信号，并且一旦指示斜坡信号的比较信号达到反馈信号，使能系统， 输出电压从残余电压向目标电平变为有效。

公开(公告)号：US20060055446A1

公开(公告)日：2006-03-16

申请号：US11220556

申请日：2005-09-08

Applicant: Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

Inventor： Liang-Pin Tai ,  Jing-Meng Liu ,  Hung-Der Su

IPC: H03K17/687

CPC classification number: H02M3/158 ,  H02M3/155 ,  H03K17/063 ,  H03K17/6871 ,  H03K17/693 ,  H03K2017/6875

Abstract: Electronic circuits use low-cost depletion-mode JFET to serve as power switch. Since depletion-mode JFET has smaller conductive resistance and is majority carrier device, the energy loss is less when current flows through the depletion-mode JFET, and faster switching speed is obtained, thereby enhancing the efficiency of the electronic circuits.

Abstract translation: 电子电路使用低成本耗尽型JFET作为电源开关。 由于耗尽型JFET具有较小的导电电阻并且是多数载流子器件，所以当电流流过耗尽型JFET时能量损失较小，并且获得更快的开关速度，从而提高电子电路的效率。

公开(公告)号：US20060043943A1

公开(公告)日：2006-03-02

申请号：US11210812

申请日：2005-08-25

Applicant: Kent Huang ,  Liang-Pin Tai

Inventor： Kent Huang ,  Liang-Pin Tai

IPC: G05F1/656

CPC classification number: H02M3/158 ,  H02M3/1584

Abstract: A fixed-frequency current mode converter comprises a power stage to produce an inductor current and an output voltage, an error amplifier to generate an error signal from the difference between the output voltage and a reference voltage varied with the inductor current, a comparator to compare the error signal with a ramp signal varied with the inductor current to generate a comparison signal, and a PWM generator to generate a PWM signal in response to a fixed-frequency clock and the comparison signal to drive the power stage. A second comparator is further comprised to compare the error signal with a second reference voltage varied with the inductor current, and generates a second comparison signal to reset the clock when the error signal is lower than the second reference voltage.

Abstract translation: 固定频率电流模式转换器包括产生电感电流和输出电压的功率级，误差放大器，根据输出电压和与电感电流变化的参考电压之间的差异产生误差信号，比较器进行比较 具有斜坡信号的误差信号随着电感器电流而变化以产生比较信号，以及PWM发生器，以响应于固定频率时钟和比较信号产生PWM信号以驱动功率级。 还包括第二比较器，用于将误差信号与随电感器电流变化的第二参考电压进行比较，并且当误差信号低于第二参考电压时产生第二比较信号以复位时钟。

公开(公告)号：US06969980B1

公开(公告)日：2005-11-29

申请号：US10850164

申请日：2004-05-21

Applicant: Liang-Pin Tai ,  Kent Hwang ,  Jian-Rong Huang ,  Kuo-Ping Liu ,  Cheng-Hsuan Fan ,  Ko-Cheng Wang ,  Yu-Fan Liao

Inventor： Liang-Pin Tai ,  Kent Hwang ,  Jian-Rong Huang ,  Kuo-Ping Liu ,  Cheng-Hsuan Fan ,  Ko-Cheng Wang ,  Yu-Fan Liao

IPC: G05F1/40 ,  G05F1/44 ,  H02M1/08

CPC classification number: H02M1/08

Abstract: A pulse width modulator includes an amplifier module, a comparator module, and a filter module. The amplifier module receives a feedback voltage signal from a passive network, and generates first and second non-inverted voltage signals and first and second inverted voltage signals in response to the feedback voltage signal. The comparator module receives the first and second non-inverted voltage signals and the first and second inverted voltage signals, and provides first and second differential voltage signals corresponding to the first and second non-inverted voltage signals and the first and second inverted voltage signals. The filter module is coupled between the amplifier module and the comparator module, and is operable so as to attenuate high frequency components of the first and second non-inverted voltage signals. As such, the presence of noise in the feedback voltage signal does not affect differential operation of the comparator module.

Abstract translation: 脉冲宽度调制器包括放大器模块，比较器模块和滤波器模块。 放大器模块从无源网络接收反馈电压信号，并响应于反馈电压信号产生第一和第二非反相电压信号以及第一和第二反相电压信号。 比较器模块接收第一和第二非反相电压信号以及第一和第二反相电压信号，并提供对应于第一和第二非反相电压信号以及第一和第二反相电压信号的第一和第二差分电压信号。 滤波器模块耦合在放大器模块和比较器模块之间，并且可操作以便衰减第一和第二非反相电压信号的高频分量。 因此，反馈电压信号中的噪声的存在不会影响比较器模块的差分工作。

公开(公告)号：US06927960B2

公开(公告)日：2005-08-09

申请号：US10282062

申请日：2002-10-29

Applicant: Jian-Rong Huang ,  Liang-Pin Tai ,  Jing-Meng Liu

Inventor： Jian-Rong Huang ,  Liang-Pin Tai ,  Jing-Meng Liu

IPC: H02H5/04

CPC classification number: H02H5/041

Abstract: A circuit protection device includes an overheat protecting circuit connected to a main circuit and capable of being activated so as to shut down the main circuit when operating temperature of the main circuit reaches a predetermined value, and a current limiting circuit connected to the main circuit for preventing current through the main circuit from exceeding a predetermined threshold value. The current limiting circuit is further connected to the overheat protecting circuit and controls activation of the overheat protecting circuit when the current through the main circuit reaches the predetermined threshold value. Therefore, erroneous operation of the circuit protection device due to a shift in component characteristics of the overheat protecting circuit attributed to limitations in fabrication can be avoided.

Abstract translation: 电路保护装置包括：连接到主电路并且能够被激活以在主电路的工作温度达到预定值时关闭主电路的过热保护电路;以及连接到主电路的限流电路， 防止通过主电路的电流超过预定阈值。 当流过主电路的电流达到预定阈值时，电流限制电路进一步连接到过热保护电路，并控制过热保护电路的启动。 因此，可以避免由于制造中的限制而引起的过热保护电路的部件特性偏移导致的电路保护装置的错误操作。

公开(公告)号：US20050017767A1

公开(公告)日：2005-01-27

申请号：US10882159

申请日：2004-07-02

Applicant: Jian-Rong Huang ,  Kuo-Ping Liu ,  Kent Huang ,  Liang-Pin Tai

Inventor： Jian-Rong Huang ,  Kuo-Ping Liu ,  Kent Huang ,  Liang-Pin Tai

IPC: H02M3/158 ,  H03F3/217 ,  H03K7/08 ,  H03B1/00

CPC classification number: H03F3/217 ,  H02M3/1588 ,  H03K7/08 ,  Y02B70/1466

Abstract: In a noise sensitivity improved switching system and method thereof, comprised sensing the output voltage of the switching system to generate a feedback signal, respectively amplifying the feedback signal by two gains to generate two signals in phase or out of phase, filtering one of the two amplified signals, and summing or comparing the filtered signal and the other one, thereby reducing the noise interference to the switching system.

Abstract translation: 在噪声敏感度改进的开关系统及其方法中，包括感测开关系统的输出电压以产生反馈信号，分别通过两个增益来放大反馈信号以产生相或异相的两个信号，滤波两个 放大信号，并对滤波后的信号进行求和或比较，从而降低对交换系统的噪声干扰。