公开(公告)号：US20120049959A1

公开(公告)日：2012-03-01

申请号：US13218370

申请日：2011-08-25

申请人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

发明人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

IPC分类号： H03F3/45 ,  G05F1/10

CPC分类号： H03F1/30

摘要： The embodiments of the present invention disclose a high power-supply rejection ratio (PSRR) amplifier circuit. The amplifier circuit comprises a low dropout regulator, a negative charge pump and an amplifier. The output voltages of the negative charge pump and the low dropout regulators don't track the change of input voltage. Therefore the amplifier circuit has high PSRR.

摘要翻译： 本发明的实施例公开了一种高电源抑制比（PSRR）放大器电路。 该放大器电路包括一个低压差稳压器，一个负电荷泵和一个放大器。 负电荷泵和低压差稳压器的输出电压不跟踪输入电压的变化。 因此放大器电路具有高PSRR。

公开(公告)号：US08514024B2

公开(公告)日：2013-08-20

申请号：US13218370

申请日：2011-08-25

申请人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

发明人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

IPC分类号： H03F3/04

CPC分类号： H03F1/30

摘要： The embodiments of the present invention disclose a high power-supply rejection ratio (PSRR) amplifier circuit. The amplifier circuit comprises a low dropout regulator, a negative charge pump and an amplifier. The output voltages of the negative charge pump and the low dropout regulators don't track the change of input voltage. Therefore the amplifier circuit has high PSRR.

摘要翻译： 本发明的实施例公开了一种高电源抑制比（PSRR）放大器电路。 该放大器电路包括一个低压差稳压器，一个负电荷泵和一个放大器。 负电荷泵和低压差稳压器的输出电压不跟踪输入电压的变化。 因此放大器电路具有高PSRR。

公开(公告)号：US20120049954A1

公开(公告)日：2012-03-01

申请号：US13218376

申请日：2011-08-25

申请人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

发明人： Rui Wang ,  Jinyan Lin ,  Huijie Zhao ,  Yunping Lang

IPC分类号： H03G1/00

CPC分类号： H03F3/387 ,  H03F3/3052 ,  H03F2200/411

摘要： The embodiments of the present circuit and method disclose an amplification circuit including a voltage regulator, a negative charge pump and an amplifier. The output of the voltage regulator supplies the upper voltage supply of the amplifier and the output of the negative charge pump supplies the lower voltage supply of the amplifier. The voltage regulator and the negative charge pump make the power supply of the amplifier flexible, easy to be fabricated in semiconductor process.

摘要翻译： 本电路和方法的实施例公开了一种包括电压调节器，负电荷泵和放大器的放大电路。 电压调节器的输出提供放大器的上限电压，负电荷泵的输出提供放大器的较低电压电源。 电压调节器和负电荷泵使放大器的电源灵活，容易在半导体制程中制造。

公开(公告)号：US20110305353A1

公开(公告)日：2011-12-15

申请号：US13158145

申请日：2011-06-10

申请人： Yunping Lang ,  Huijie Zhao ,  Huafei Ding

发明人： Yunping Lang ,  Huijie Zhao ,  Huafei Ding

IPC分类号： H03F99/00 ,  G05F1/10

CPC分类号： H03F3/217 ,  H03F1/30 ,  H03F1/301 ,  H03F1/342 ,  H03F3/183 ,  H03F3/2173 ,  H03F2200/153 ,  H03F2200/351 ,  H03F2200/459

摘要： The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.

摘要翻译： 本技术一般涉及一种闭环功率级和包括该功率级的音频放大器电路。 本技术还提供了一种用于控制放大器电路的方法。 闭环功率级被配置为接收具有第一频率和第一占空比的PWM输入信号，电源电压和与电源电压相关的偏置信号，并且输出具有 第二频率和第二占空比。 闭环功率级包括反馈回路，其被配置为响应于电源电压的变化来调节方波信号的第二占空比。 包括闭环功率级的音频放大器电路可以具有稳定的输出电压，因此具有良好的电源抑制性能。

公开(公告)号：US08848945B2

公开(公告)日：2014-09-30

申请号：US13158145

申请日：2011-06-10

申请人： Yunping Lang ,  Huijie Zhao ,  Huafei Ding

发明人： Yunping Lang ,  Huijie Zhao ,  Huafei Ding

IPC分类号： H03F99/00 ,  H03F3/217 ,  H03F1/30

CPC分类号： H03F3/217 ,  H03F1/30 ,  H03F1/301 ,  H03F1/342 ,  H03F3/183 ,  H03F3/2173 ,  H03F2200/153 ,  H03F2200/351 ,  H03F2200/459

摘要： The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.

摘要翻译： 本技术一般涉及一种闭环功率级和包括该功率级的音频放大器电路。 本技术还提供了一种用于控制放大器电路的方法。 闭环功率级被配置为接收具有第一频率和第一占空比的PWM输入信号，电源电压和与电源电压相关的偏置信号，并且输出具有 第二频率和第二占空比。 闭环功率级包括反馈回路，其被配置为响应于电源电压的变化来调节方波信号的第二占空比。 包括闭环功率级的音频放大器电路可以具有稳定的输出电压，因此具有良好的电源抑制性能。

公开(公告)号：US08618782B2

公开(公告)日：2013-12-31

申请号：US13218355

申请日：2011-08-25

申请人： Xiaoming Li ,  Yunping Lang

发明人： Xiaoming Li ,  Yunping Lang

IPC分类号： G05F1/00

CPC分类号： H02M3/157 ,  H02M3/33515 ,  H02M2001/0012

摘要： The embodiments of the present invention illustrate a means for digitally controlling a converter system and associated method. Wherein the means for digitally controlling a converter system comprises a means for generating a digital error signal according to an output voltage of the converter system and a reference voltage, a means for generating a digital control signal according to a digital reference signal and the digital error signal, and a means for generating a PWM signal according to the digital control signal in order to control the converter system. The means for digitally controlling a converter system and associated method at least alleviate the problem of limit-cycle oscillation, and promote the performance of system transient response and accuracy.

摘要翻译： 本发明的实施例示出了用于数字控制转换器系统和相关方法的装置。 其中用于数字控制转换器系统的装置包括用于根据转换器系统的输出电压和参考电压产生数字误差信号的装置，用于根据数字参考信号和数字误差产生数字控制信号的装置 信号，以及用于根据数字控制信号产生PWM信号以便控制转换器系统的装置。 用于数字控制转换器系统和相关方法的手段至少减轻了极限循环振荡的问题，并提高了系统瞬态响应和精度的性能。

公开(公告)号：US07728666B2

公开(公告)日：2010-06-01

申请号：US12169539

申请日：2008-07-08

申请人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

发明人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

摘要翻译： 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中，放大器将输出节点处的信号反馈到比较器的反相输入，并向比较器的非反相输入端提供高频三角波信号。 此外，比较器的非反相输入可以耦合到偏移电压，而比较器的反相输入可以耦合到固定频率矩形波信号，从输出级导出的反馈信号和 输入信号。 在使用中，开关频率可以至少基本上固定，以便减少由电磁干扰（EMI）引起的对系统的影响。 此外，控制电路简单，一些设备可以集成。

公开(公告)号：US20090045873A1

公开(公告)日：2009-02-19

申请号：US12169539

申请日：2008-07-08

申请人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

发明人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

摘要翻译： 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中，放大器将输出节点处的信号反馈到比较器的反相输入，并向比较器的非反相输入端提供高频三角波信号。 此外，比较器的非反相输入可以耦合到偏移电压，而比较器的反相输入可以耦合到固定频率矩形波信号，从输出级导出的反馈信号和 输入信号。 在使用中，开关频率可以至少基本上固定，以便减少由电磁干扰（EMI）引起的对系统的影响。 此外，控制电路简单，一些设备可以集成。

公开(公告)号：US08004360B2

公开(公告)日：2011-08-23

申请号：US12766792

申请日：2010-04-23

申请人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

发明人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

摘要翻译： 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中，放大器将输出节点处的信号反馈到比较器的反相输入，并向比较器的非反相输入端提供高频三角波信号。 此外，比较器的非反相输入可以耦合到偏移电压，而比较器的反相输入可以耦合到固定频率矩形波信号，从输出级导出的反馈信号和 输入信号。 在使用中，开关频率可以至少基本上固定，以便减少由电磁干扰（EMI）引起的对系统的影响。 此外，控制电路简单，一些设备可以集成。

公开(公告)号：US20120049809A1

公开(公告)日：2012-03-01

申请号：US13218355

申请日：2011-08-25

申请人： Xiaoming Li ,  Yunping Lang

发明人： Xiaoming Li ,  Yunping Lang

IPC分类号： G05F1/10

CPC分类号： H02M3/157 ,  H02M3/33515 ,  H02M2001/0012

摘要： The embodiments of the present invention illustrate a means for digitally controlling a converter system and associated method. Wherein the means for digitally controlling a converter system comprises a means for generating a digital error signal according to an output voltage of the converter system and a reference voltage, a means for generating a digital control signal according to a digital reference signal and the digital error signal, and a means for generating a PWM signal according to the digital control signal in order to control the converter system. The means for digitally controlling a converter system and associated method at least alleviate the problem of limit-cycle oscillation, and promote the performance of system transient response and accuracy.

摘要翻译： 本发明的实施例示出了用于数字控制转换器系统和相关方法的装置。 其中用于数字控制转换器系统的装置包括用于根据转换器系统的输出电压和参考电压产生数字误差信号的装置，用于根据数字参考信号和数字误差产生数字控制信号的装置 信号，以及用于根据数字控制信号产生PWM信号以便控制转换器系统的装置。 用于数字控制转换器系统和相关方法的手段至少减轻了极限循环振荡的问题，并提高了系统瞬态响应和精度的性能。