公开(公告)号：US20080211471A1

公开(公告)日：2008-09-04

申请号：US12071727

申请日：2008-02-26

申请人： Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

发明人： Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： In an adaptive leading-edge blanking circuit and method for a switching mode power converter, an inductor current of the converter is sensed and compared with a threshold to decide an end point of a leading-edge blanking time. Circuit and method are further provided for preventing the converter from entering pulse skipping mode, which employs a current trimming circuit in an oscillator for a PWM controller in the converter to reduce a charging current in the oscillator if the output voltage of the converter is excessively high, to thereby reduce the oscillator frequency and in turn lower the switching frequency of a high-side power switch of the converter.

摘要翻译： 在用于开关模式功率转换器的自适应前沿消隐电路和方法中，感测转换器的电感器电流并将其与阈值进行比较以决定前沿消隐时间的终点。 进一步提供电路和方法，用于防止转换器进入脉冲跳跃模式，其在转换器中的PWM控制器的振荡器中采用电流微调电路，以在转换器的输出电压过高时降低振荡器中的充电电流 ，从而降低振荡器频率，从而降低转换器的高侧功率开关的开关频率。

公开(公告)号：US07839667B2

公开(公告)日：2010-11-23

申请号：US12071727

申请日：2008-02-26

申请人： Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

发明人： Chia-Wei Liao ,  Jing-Meng Liu ,  Jwin-Yen Guo

IPC分类号： H02M3/24

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： In an adaptive leading-edge blanking circuit and method for a switching mode power converter, an inductor current of the converter is sensed and compared with a threshold to decide an end point of a leading-edge blanking time. Circuit and method are further provided for preventing the converter from entering pulse skipping mode, which employs a current trimming circuit in an oscillator for a PWM controller in the converter to reduce a charging current in the oscillator if the output voltage of the converter is excessively high, to thereby reduce the oscillator frequency and in turn lower the switching frequency of a high-side power switch of the converter.

摘要翻译： 在用于开关模式功率转换器的自适应前沿消隐电路和方法中，感测转换器的电感器电流并将其与阈值进行比较以决定前沿消隐时间的终点。 进一步提供电路和方法，用于防止转换器进入脉冲跳跃模式，其在转换器中的PWM控制器的振荡器中采用电流微调电路，以在转换器的输出电压过高时降低振荡器中的充电电流 ，从而降低振荡器频率，从而降低转换器的高侧功率开关的开关频率。

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：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：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：US20090279713A1

公开(公告)日：2009-11-12

申请号：US12460539

申请日：2009-07-21

申请人： Jwin-Yen Guo ,  Ching-Hsiang Yang

发明人： Jwin-Yen Guo ,  Ching-Hsiang Yang

IPC分类号： H04R1/10

CPC分类号： H03F3/187 ,  H03F1/0211 ,  H03F3/45475 ,  H03F3/68 ,  H03F2200/516 ,  H04R2460/03

摘要： The present invention discloses a multi-voltage headphone driver circuit comprising: at least one operational amplifier having an output supplied to a headphone speaker, the operational amplifier receiving a first power supply as its high operation voltage; a charge pump receiving a second power supply to generate a negative voltage corresponding to the second power supply in magnitude; and an m-fold circuit multiplying the negative voltage by m and providing the result to the operational amplifier as a low operation voltage thereof, wherein m is a real number.

摘要翻译： 本发明公开了一种多电压耳机驱动电路，包括：至少一个运算放大器，具有提供给耳机扬声器的输出，运算放大器接收第一电源作为其高操作电压; 电荷泵接收第二电源以产生与第二电源相对应的负电压; 以及将负电压乘以m并将结果作为其操作电压的运算放大器的m倍电路，其中m是实数。

公开(公告)号：US08487690B2

公开(公告)日：2013-07-16

申请号：US13435277

申请日：2012-03-30

申请人： Wei-Hsin Wei ,  Jwin-Yen Guo ,  Teng-Hung Chang ,  Ming-Jun Hsiao

发明人： Wei-Hsin Wei ,  Jwin-Yen Guo ,  Teng-Hung Chang ,  Ming-Jun Hsiao

IPC分类号： G05F1/10

CPC分类号： H02M3/07 ,  H02M2003/071

摘要： A dual mode charge pump is operable in a first mode or a second mode for providing positive and negative output voltages that can be stabilized by adjusting the charging time of two terminals of a flying capacitor or by adjusting the charging/discharging time of the positive and negative voltage output terminals. The dual mode charge pump can apply to a much wider input supply voltage range with less numbers of power switches, thus requiring less die area and lower costs. Moreover, the dual mode charge pump can precisely define a common mode voltage, thus making the common voltage drift smaller and less load dependent, especially when the output supply voltages are under different load conditions.

摘要翻译： 双模式电荷泵可以在第一模式或第二模式中操作，用于提供正和负输出电压，其可以通过调节飞跨电容器的两个端子的充电时间来稳定，或者通过调节正极和负极的充电/放电时间来稳定 负电压输出端子。 双模式电荷泵可以应用于具有较少数量的电源开关的更宽的输入电源电压范围，因此需要更少的管芯面积和更低的成本。 此外，双模电荷泵可以精确定义共模电压，从而使公共电压漂移越来越小，负载依赖，特别是当输出电源电压处于不同的负载条件下时。

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：US08411879B2

公开(公告)日：2013-04-02

申请号：US12507060

申请日：2009-07-21

申请人： Jwin-Yen Guo ,  Ching-Hsiang Yang

发明人： Jwin-Yen Guo ,  Ching-Hsiang Yang

IPC分类号： H03F99/00 ,  H03F3/04 ,  H04R1/10

CPC分类号： H03F3/187 ,  H03F1/0211 ,  H03F3/45475 ,  H03F2203/45136 ,  H03F2203/45166 ,  H04R2460/03

摘要： A speaker driver circuit driven by positive and negative voltages, comprising: at least one operational amplifier providing an output to a headphone speaker, and a voltage converter receiving a supplied voltage (VDD), generating r-fold positive and negative voltages (r·VDD and −r·VDD, wherein r is any positive real number except 1) according to the supplied voltage, and supplying the positive and negative voltages to the operational amplifier for its high and low operation voltage levels respectively.

摘要翻译： 由正负电压驱动的扬声器驱动电路，包括：至少一个运算放大器，为耳机扬声器提供输出;以及电压转换器，接收所提供的电压（VDD），产生r倍的正负电压（r·VDD 和-r·VDD，其中r是除了1）根据所提供的电压之外的任何正实数，并且将正和负电压分别提供给运算放大器用于其高和低操作电压电平。