公开(公告)号：US07973598B2

公开(公告)日：2011-07-05

申请号：US12690380

申请日：2010-01-20

Applicant: Po-Yu Li ,  Kuan-Jen Tseng

Inventor： Po-Yu Li ,  Kuan-Jen Tseng

IPC: H03F1/36

CPC classification number: H03F3/2173

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract translation: 音频功率放大器包括前置放大器，误差放大器，比较器，桥接电路和反馈电路，其中当音频功率放大器通电时，前置放大器的增益逐渐增加。 比较器通过比较参考信号和放大的音频信号来产生PWM信号。 桥式电路具有根据PWM信号控制的开关，使得驱动电流交替地流过负载。 反馈电路产生指示负载条件的反馈信号。

公开(公告)号：US20090231035A1

公开(公告)日：2009-09-17

申请号：US12049578

申请日：2008-03-17

Applicant: Kuan-Jen Tseng ,  Po-Yu LI

Inventor： Kuan-Jen Tseng ,  Po-Yu LI

IPC: H03F3/217 ,  H03F3/38

CPC classification number: H03F3/2173 ,  H03F1/305 ,  H03F2200/03 ,  H03F2200/351

Abstract: A class D audio amplifier includes an error amplifier, a comparator, a bridge circuit, a feedback circuit and a silent start circuit. The error amplifier generates an error signal by amplifying a difference between a feedback signal and an audio input signal. The comparator generates a first pulse width modulation (PWM) signal by comparing a first triangular-wave signal and the error signal. The bridge circuit has switches alternately conducting a current flowing into and from a load. The feedback circuit generates the feedback signal indicating a condition of the load. The silent start circuit performs AND operation of the first PWM signal and a second PWM signal having a gradually increased duty ratio to generate a third PWM signal for control of the switches of the bridge circuit.

Abstract translation: D类音频放大器包括误差放大器，比较器，桥接电路，反馈电路和静音启动电路。 误差放大器通过放大反馈信号和音频输入信号之间的差异来产生误差信号。 比较器通过比较第一三角波信号和误差信号来产生第一脉宽调制（PWM）信号。 桥式电路具有交替地导通流入和流出负载的电流的开关。 反馈电路产生指示负载条件的反馈信号。 无声启动电路执行第一PWM信号的AND运算和具有逐渐增加的占空比的第二PWM信号，以产生用于控制桥式电路的开关的第三PWM信号。

公开(公告)号：US20100117739A1

公开(公告)日：2010-05-13

申请号：US12690380

申请日：2010-01-20

Applicant: Po-Yu Li ,  Kuan-Jen Tseng

Inventor： Po-Yu Li ,  Kuan-Jen Tseng

IPC: H03F3/16

CPC classification number: H03F3/2173

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract translation: 音频功率放大器包括前置放大器，误差放大器，比较器，桥接电路和反馈电路，其中当音频功率放大器通电时，前置放大器的增益逐渐增加。 比较器通过比较参考信号和放大的音频信号来产生PWM信号。 桥式电路具有根据PWM信号控制的开关，使得驱动电流交替地流过负载。 反馈电路产生指示负载条件的反馈信号。

公开(公告)号：US07629842B2

公开(公告)日：2009-12-08

申请号：US12049578

申请日：2008-03-17

Applicant: Kuan-Jen Tseng ,  Po-Yu Li

Inventor： Kuan-Jen Tseng ,  Po-Yu Li

IPC: H03F3/38

CPC classification number: H03F3/2173 ,  H03F1/305 ,  H03F2200/03 ,  H03F2200/351

Abstract: A class D audio amplifier includes an error amplifier, a comparator, a bridge circuit, a feedback circuit and a silent start circuit. The error amplifier generates an error signal by amplifying a difference between a feedback signal and an audio input signal. The comparator generates a first pulse width modulation (PWM) signal by comparing a first triangular-wave signal and the error signal. The bridge circuit has switches alternately conducting a current flowing into and from a load. The feedback circuit generates the feedback signal indicating a condition of the load. The silent start circuit performs AND operation of the first PWM signal and a second PWM signal having a gradually increased duty ratio to generate a third PWM signal for control of the switches of the bridge circuit.

Abstract translation: D类音频放大器包括误差放大器，比较器，桥接电路，反馈电路和静音启动电路。 误差放大器通过放大反馈信号和音频输入信号之间的差异来产生误差信号。 比较器通过比较第一三角波信号和误差信号来产生第一脉宽调制（PWM）信号。 桥式电路具有交替地导通流入和流出负载的电流的开关。 反馈电路产生指示负载条件的反馈信号。 无声启动电路执行第一PWM信号的AND运算和具有逐渐增加的占空比的第二PWM信号，以产生用于控制桥式电路的开关的第三PWM信号。

公开(公告)号：US20090231030A1

公开(公告)日：2009-09-17

申请号：US12049567

申请日：2008-03-17

Applicant: Po-Yu Li ,  Kuan-Jen Tseng

Inventor： Po-Yu Li ,  Kuan-Jen Tseng

IPC: H03F3/38

CPC classification number: H03F3/2173

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract translation: 音频功率放大器包括前置放大器，误差放大器，比较器，桥接电路和反馈电路，其中当音频功率放大器通电时，前置放大器的增益逐渐增加。 比较器通过比较参考信号和放大的音频信号来产生PWM信号。 桥式电路具有根据PWM信号控制的开关，使得驱动电流交替地流过负载。 反馈电路产生指示负载条件的反馈信号。

公开(公告)号：US07714646B2

公开(公告)日：2010-05-11

申请号：US12049567

申请日：2008-03-17

Applicant: Po-Yu Li ,  Kuan-Jen Tseng

Inventor： Po-Yu Li ,  Kuan-Jen Tseng

IPC: H03F3/38

CPC classification number: H03F3/2173

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract translation: 音频功率放大器包括前置放大器，误差放大器，比较器，桥接电路和反馈电路，其中当音频功率放大器通电时，前置放大器的增益逐渐增加。 比较器通过比较参考信号和放大的音频信号来产生PWM信号。 桥式电路具有根据PWM信号控制的开关，使得驱动电流交替地流过负载。 反馈电路产生指示负载条件的反馈信号。

公开(公告)号：US08779737B2

公开(公告)日：2014-07-15

申请号：US12579262

申请日：2009-10-14

Applicant: Kuan-Jen Tseng

Inventor： Kuan-Jen Tseng

IPC: G05F1/613 ,  H03K7/08

CPC classification number: H03K7/08

Abstract: A voltage converting circuit for converting an input voltage into an output voltage is disclosed. The voltage converting circuit includes a modulation signal generator, a comparator and a logic unit. The modulation signal generator is configured for generating a pulse width modulation (PWM) signal responsive to a feedback signal corresponding to the output voltage and a load coupled thereto. The comparator is configured for comparing the feedback signal with a reference signal to output a comparing signal. The logic unit is configured for performing a logical conjunction of the PWM signal and the comparing signal to generate a control signal for adjusting an input current corresponding to the input voltage to regulate the output voltage. A method for converting an input voltage into an output voltage is also disclosed herein.

Abstract translation: 公开了一种用于将输入电压转换为输出电压的电压转换电路。 电压转换电路包括调制信号发生器，比较器和逻辑单元。 调制信号发生器被配置为响应于对应于输出电压的反馈信号和与其耦合的负载来产生脉宽调制（PWM）信号。 比较器被配置为将反馈信号与参考信号进行比较以输出比较信号。 逻辑单元被配置为执行PWM信号和比较信号的逻辑连接，以产生用于调节与输入电压相对应的输入电流的控制信号，以调节输出电压。 本文还公开了将输入电压转换为输出电压的方法。

公开(公告)号：US08779688B2

公开(公告)日：2014-07-15

申请号：US12911084

申请日：2010-10-25

Applicant: Kuan-Jen Tseng

Inventor： Kuan-Jen Tseng

IPC: H05B37/00

CPC classification number: H05B33/0827 ,  H05B33/0815

Abstract: A light emitting diode driving circuit includes connected driving units, each of which is configured for driving multiple channels of light emitting diodes generating a feedback voltage for the corresponding driving unit. Each of the driving units includes a selection circuit for comparing the feedback voltage with an input voltage to output a smaller one of the feedback voltage and the input voltage to a next one of the driving units, as the input voltage for the next one of the driving units.

Abstract translation: 发光二极管驱动电路包括连接的驱动单元，每个驱动单元被配置为用于驱动产生用于相应驱动单元的反馈电压的多个通道的发光二极管。 每个驱动单元包括选择电路，用于将反馈电压与输入电压进行比较，以将较小的一个反馈电压和输入电压输出到下一个驱动单元，作为下一个驱动单元的输入电压 驾驶单位。

公开(公告)号：US08390215B2

公开(公告)日：2013-03-05

申请号：US12899825

申请日：2010-10-07

Applicant: Kuan-Jen Tseng

Inventor： Kuan-Jen Tseng

IPC: H05B37/02

CPC classification number: H05B33/0827

Abstract: A voltage selection circuit selecting a minimum voltage from the remainder voltages outputted from the light emitting diode channels is disclosed. The voltage selection circuit includes a first picking circuit, which has the first operation amplifiers, a positive input terminal, an output terminal, a negative input terminal, and an output stage. Each of the first operation amplifiers includes a positive input terminal, an output terminal, a negative input terminal, and an output stage. The positive input terminal receives one of the remainder voltages from one of the first ends of the light emitting diode channels. The output terminal outputs the minimum voltage, in which the output terminals of the first operation amplifiers are connected together. The negative input terminal is electrically connected to the output terminal. The output stage is electrically connected to the output terminal, in which the output stage has current sinking ability stronger than current sourcing ability.

Abstract translation: 公开了从发光二极管通道输出的剩余电压中选择最小电压的电压选择电路。 电压选择电路包括具有第一运算放大器，正输入端，输出端，负输入端和输出级的第一拾取电路。 每个第一运算放大器包括正输入端，输出端，负输入端和输出级。 正输入端子从发光二极管通道的第一端中的一个接收剩余电压中的一个。 输出端子输出第一运算放大器的输出端子连接在一起的最小电压。 负输入端子电连接到输出端子。 输出级与输出端电连接，输出级的电流下降能力强于电流源。

公开(公告)号：US20110084770A1

公开(公告)日：2011-04-14

申请号：US12577951

申请日：2009-10-13

Applicant: Kuan-Jen Tseng

Inventor： Kuan-Jen Tseng

IPC: H03B1/00

CPC classification number: H03K3/354 ,  H03K3/017 ,  H03K3/0231 ,  H03K4/502

Abstract: An oscillator is provided. The oscillator comprises a flip-flop module, a first and a second setting module. The first setting module comprises: a first switch device to generates a first switch signal according to a first oscillating signal, an NMOS and an inverter. The NMOS comprises a drain to receive a first charging current and a gate to receive the first switch signal, wherein the drain is charged or discharged according to the first switch signal. The inverter is connected to the drain to generate a first setting signal. The second setting module comprises a second switch device to generate a second switch signal according to a second oscillating signal and a comparator to generate a second setting signal according to the second switch signal and a reference voltage. The flip-flop module generates the first and the second oscillating signal according to the first and the second setting signal.

Abstract translation: 提供振荡器。 振荡器包括触发器模块，第一和第二设置模块。 第一设置模块包括：根据第一振荡信号产生第一开关信号的第一开关装置，NMOS和反相器。 NMOS包括用于接收第一充电电流的漏极和用于接收第一开关信号的栅极，其中根据第一开关信号对漏极进行充电或放电。 逆变器连接到漏极以产生第一设置信号。 第二设定模块包括根据第二振荡信号产生第二开关信号的第二开关装置和根据第二开关信号和参考电压产生第二设定信号的比较器。 触发器模块根据第一和第二设置信号产生第一和第二振荡信号。