公开(公告)号：US20100128501A1

公开(公告)日：2010-05-27

申请号：US12581775

申请日：2009-10-19

申请人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

发明人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： System and method for regulating a power converter. The system includes a first signal generator configured to receive at least an input signal and generate at least a first output signal associated with demagnetization and a second output signal associated with sampling. Additionally, the system includes a sampling component configured to receive at least the input signal and the second output signal, sample the input signal based on at least information associated with the second output signal, and generate at least a third output signal associated with one or more sampled magnitudes. Moreover, the system includes an error amplifier configured to receive at least the third output signal and a first threshold voltage and generate at least a fourth output signal with a capacitor, the capacitor being coupled to the error amplifier.

摘要翻译： 用于调节功率转换器的系统和方法。 该系统包括第一信号发生器，其被配置为接收至少一个输入信号并且产生与去磁有关的至少第一输出信号和与取样相关联的第二输出信号。 另外，该系统包括被配置为至少接收输入信号和第二输出信号的采样分量，至少基于与第二输出信号相关联的信息对输入信号进行采样，并且产生与一个或多个输出信号相关联的至少第三输出信号 更多采样幅度。 此外，该系统包括误差放大器，该误差放大器被配置为接收至少第三输出信号和第一阈值电压并且用电容器产生至少第四输出信号，该电容器耦合到误差放大器。

公开(公告)号：US20100027299A1

公开(公告)日：2010-02-04

申请号：US12510021

申请日：2009-07-27

申请人： Lieyi Fang

发明人： Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0022

摘要： Switching-mode power conversion system and method thereof. The system includes a primary winding configured to receive an input voltage and a secondary winding coupled to the primary winding. Additionally, the system includes a compensation component configured to receive the input voltage and generate at least a clock signal based on at least information associated with the input voltage, and a signal generator configured to receive at least the clock signal and generate at least a control signal based on at least information associated with the clock signal. Moreover, the system includes a gate driver configured to receive at least the control signal and generate a drive signal based on at least information associated with the control signal, and a first switch configured to receive the drive signal and affect a first current flowing through the primary winding.

摘要翻译： 开关电源转换系统及其方法。 该系统包括被配置为接收输入电压的初级绕组和耦合到初级绕组的次级绕组。 另外，该系统包括被配置为接收输入电压并且至少基于与输入电压相关联的信息产生时钟信号的补偿组件，以及被配置为至少接收时钟信号并且至少产生控制的信号发生器 至少基于与时钟信号相关联的信息的信号。 此外，该系统包括栅极驱动器，其被配置为至少接收控制信号并且至少基于与控制信号相关联的信息产生驱动信号，以及第一开关，被配置为接收驱动信号并影响流经 初级绕组。

公开(公告)号：US07391169B2

公开(公告)日：2008-06-24

申请号：US11357350

申请日：2006-02-17

申请人： Jianfeng Huang ,  Liqiang Zhu ,  Zhen Zhu ,  Lieyi Fang

发明人： Jianfeng Huang ,  Liqiang Zhu ,  Zhen Zhu ,  Lieyi Fang

IPC分类号： H05B37/02 ,  H02M11/00

CPC分类号： H05B41/39 ,  H05B41/282

摘要： System and method for processing analog voltage for cold-cathode fluorescent lamp. The system includes a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal, and a current processing component configured to receive the first current signal and a predetermined current and generate a second current signal. Additionally, the system includes a current-to-voltage converter configured to receive the second current signal and generate an output analog voltage signal, and a dimming controller configured to receive the output analog voltage signal and generate a control signal for driving at least a cold-cathode fluorescent lamp. The voltage-to-current converter, the current processing component, and the current-to-voltage converter are configured to be biased between a first power supply voltage level and a second power supply voltage level.

摘要翻译： 冷阴极荧光灯模拟电压处理系统及方法。 该系统包括被配置为接收输入模拟电压信号并产生第一电流信号的电压 - 电流转换器，以及被配置为接收第一电流信号和预定电流并产生第二电流信号的电流处理部件。 另外，该系统包括被配置为接收第二电流信号并产生输出模拟电压信号的电流 - 电压转换器，以及调光控制器，被配置为接收输出模拟电压信号并产生用于至少驱动冷的控制信号 阴极荧光灯。 电压 - 电流转换器，当前处理组件和电流 - 电压转换器被配置为在第一电源电压电平和第二电源电压电平之间被偏置。

公开(公告)号：US07167056B2

公开(公告)日：2007-01-23

申请号：US10955064

申请日：2004-09-30

申请人： Lieyi Fang ,  Asit Shankar ,  Lars Risbo

发明人： Lieyi Fang ,  Asit Shankar ,  Lars Risbo

IPC分类号： H03K3/03 ,  H03B5/12 ,  H03L7/093

CPC分类号： H03L7/0995 ,  H03L7/0891 ,  H03L2207/04

摘要： The present invention achieves technical advantages as a high performance analog charge pumped phase locked loop (PLL)(10) with process and temperature compensation in closed loop bandwidth. The PLL reduces the variation in bandwidth and stability by making the product KVCO*ICP independent of process and temperature variation. The PLL achieves a higher performance than existing PLL architectures, achieving a high dynamic range up to at least 110 dB, such that a PWM class-D amplifier is realizable with this PLL. The PLL has a constant bandwidth and damping factor while using an analog charge pump (16).

摘要翻译： 本发明实现了在闭环带宽中具有过程和温度补偿的高性能模拟电荷泵浦锁相环（PLL）（10）的技术优点。 PLL通过不依赖于过程和温度变化产生产品K VCO，从而减小带宽和稳定性的变化。 PLL实现了比现有PLL架构更高的性能，实现高达至少110 dB的高动态范围，从而可以利用该PLL实现PWM D类放大器。 使用模拟电荷泵（16）时，PLL具有恒定的带宽和阻尼因子。

公开(公告)号：US07023497B2

公开(公告)日：2006-04-04

申请号：US10210473

申请日：2002-07-31

申请人： Lieyi Fang ,  Haydar Bilhan ,  Gonggui Xu ,  Ramesh Chandrasekaran ,  Feng Ying ,  Erkan Bilhan ,  Jason Meiners

发明人： Lieyi Fang ,  Haydar Bilhan ,  Gonggui Xu ,  Ramesh Chandrasekaran ,  Feng Ying ,  Erkan Bilhan ,  Jason Meiners

IPC分类号： H04N5/16

CPC分类号： H04N5/185 ,  H04N5/18

摘要： A clamping circuit disclosed herein has two modes of operation which include both a bottom level and mid-level clamping mode for clamping automatically onto the sync tip of a video signal and customizably clamping onto the front porch, back porch/pedestal or anywhere within the signal. The clamping circuit (400) includes a clamping capacitor (404) that couples to an automatic clamping circuit portion (405) to automatically clamp the synchronization pulse of the video input signal to a first predetermined reference voltage (Vref1) of a first clamping pulse signal during an automatic clamping mode of operation. The automatic clamping portion (405) connects to the customizable clamping circuit portion (411) to clamp any portion of the video input signal to a second predetermined reference voltage (Vref2) of a second clamping pulse signal during a customizable clamping mode of operation. A buffer (416) connects between the customizable clamping circuit portion and the output node of the clamping circuit.

摘要翻译： 本文公开的钳位电路具有两种操作模式，其包括底部电平和中间级钳位模式，用于自动钳位在视频信号的同步端上，并可自定义地夹紧在前沿，后沿/基座或信号内的任何地方 。 钳位电路（400）包括钳位电容器（404），其耦合到自动钳位电路部分（405）以自动将视频输入信号的同步脉冲钳位到第一预定参考电压（V SUB ref1 ）在自动钳位操作模式期间的第一钳位脉冲信号。 自动夹紧部分（405）连接到可定制的钳位电路部分（411），以将视频输入信号的任何部分钳位到第二钳位脉冲信号的第二预定参考电压（V SUB ref2

公开(公告)号：US06690242B2

公开(公告)日：2004-02-10

申请号：US10059626

申请日：2002-01-29

申请人： Lieyi Fang ,  Charles M. Branch ,  Kuok Young Ling ,  Feng Ying

发明人： Lieyi Fang ,  Charles M. Branch ,  Kuok Young Ling ,  Feng Ying

IPC分类号： H03B2700

CPC分类号： H03K17/04106 ,  H03K5/133 ,  H03K2005/0013 ,  H03K2005/00208

摘要： A circuit for providing a symmetrical output signal to a communication system. The circuit includes an input circuit (22 and 24) for receiving an input signal and a symmetry circuits (205 and 210) advantageously configured to provide an output signal exhibiting a symmetrical rising and falling edge waveform in response to the received input signal. An integrated power source (Is) provides current to a common node (N1) in which current is advantageously steered to each half circuit (22, 205 and 24, 210) to reduce voltage variation on the common node during voltage transition of the input signal, hence, reducing current fluctuation from the current source.

摘要翻译： 一种用于向通信系统提供对称输出信号的电路。 该电路包括用于接收输入信号的输入电路（22和24）和有利地配置为响应于所接收的输入信号提供表现出对称的上升和下降沿波形的输出信号的对称电路（205和210）。 集成电源（Is）向公共节点（N1）提供电流，其中电流有利地转向每个半电路（22,205和24,210），以在输入信号的电压转换期间减小公共节点上的电压变化 ，从而减少电流来自电流源的波动。

公开(公告)号：US08879283B2

公开(公告)日：2014-11-04

申请号：US12912050

申请日：2010-10-26

申请人： Dongze Yang ,  Yaming Cao ,  Yunchao Zhang ,  Lieyi Fang

发明人： Dongze Yang ,  Yaming Cao ,  Yunchao Zhang ,  Lieyi Fang

IPC分类号： H02M3/335 ,  H02M1/32 ,  H02M1/00

CPC分类号： H02M3/33515 ,  H02H7/1213 ,  H02M1/08 ,  H02M1/32 ,  H02M3/33507 ,  H02M2001/0009

摘要： System and method for protecting a power converter. The system includes a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison signal. The second threshold signal is different from the first threshold signal in magnitude. Moreover, the system includes a first detection component configured to receive at least the second comparison signal, detect the second comparison signal only if one or more predetermined conditions are satisfied, and generate a first detection signal based on at least information associated with the detected second comparison signal.

摘要翻译： 保护电源转换器的系统和方法。 该系统包括被配置为接收第一阈值信号和第一信号并产生第一比较信号的第一比较器。 第一个信号与功率转换器的输入电流相关联。 另外，该系统包括第二比较器，其被配置为接收第二阈值信号和第一信号并产生第二比较信号。 第二阈值信号的大小与第一阈值信号不同。 此外，该系统包括被配置为至少接收第二比较信号的第一检测组件，仅在满足一个或多个预定条件时检测第二比较信号，并且至少基于与检测到的第二比较信号相关联的信息产生第一检测信号 比较信号。

公开(公告)号：US08648630B2

公开(公告)日：2014-02-11

申请号：US13297085

申请日：2011-11-15

申请人： Jiqing Yang ,  Meng Li ,  Qiang Luo ,  Lieyi Fang

发明人： Jiqing Yang ,  Meng Li ,  Qiang Luo ,  Lieyi Fang

IPC分类号： H03B1/00 ,  H03K3/00

CPC分类号： H03K17/302 ,  H03K17/063 ,  H03K2217/0081

摘要： System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.

摘要翻译： 提供了用于驱动晶体管的系统和方法。 该系统包括浮置电压发生器，第一驱动电路和第二驱动电路。 浮置电压发生器被配置为接收第一偏置电压并产生浮置电压，该浮动电压发生器进一步被配置为如果第一偏置电压改变则改变浮动电压，并且将浮置电压保持为低于第一偏置电压 偏置电压大小为第一预定值。 第一驱动电路被配置为接收输入信号，第一偏置电压和浮置电压。 第二驱动电路被配置为接收输入信号，第二偏置电压和第三偏置电压，第一驱动电路和第二驱动电路被配置为产生驱动晶体管的输出信号。

公开(公告)号：US08559152B2

公开(公告)日：2013-10-15

申请号：US13005427

申请日：2011-01-12

申请人： Yaming Cao ,  Jinya Dong ,  Yunchao Zhang ,  Lieyi Fang

发明人： Yaming Cao ,  Jinya Dong ,  Yunchao Zhang ,  Lieyi Fang

IPC分类号： H02H5/04

CPC分类号： H02M1/32 ,  H02H3/006 ,  H02M3/33507

摘要： System and method for protecting a power converter. The system includes a duty-cycle detection component configured to receive a modulation signal, determine a first duty cycle corresponding to a first period of the modulation signal, compare the first duty cycle with a threshold duty cycle, and generate a duty-cycle comparison signal. Additionally, the system includes a threshold generator configured to receive the duty-cycle comparison signal and generate a threshold signal corresponding to a second period of the modulation signal, the second period being after the first period, and a comparator configured to receive the threshold signal and a first signal and to generate a first comparison signal. The first signal is associated with an input current for a power converter. Moreover, the system includes a pulse-width-modulation component configured to receive the first comparison signal and generate the modulation signal for adjusting the input current for the power converter.

摘要翻译： 保护电源转换器的系统和方法。 该系统包括：占空比检测部件，被配置为接收调制信号，确定与调制信号的第一周期对应的第一占空比，将第一占空比与阈值占空比进行比较，并产生占空比比较信号 。 另外，该系统包括阈值发生器，其被配置为接收占空比比较信号并产生对应于调制信号的第二周期的阈值信号，第二周期在第一周期之后，以及比较器，被配置为接收阈值信号 和第一信号并产生第一比较信号。 第一个信号与功率转换器的输入电流相关联。 此外，该系统包括脉冲宽度调制分量，其被配置为接收第一比较信号并产生用于调整功率转换器的输入电流的调制信号。

公开(公告)号：US08526203B2

公开(公告)日：2013-09-03

申请号：US12581775

申请日：2009-10-19

申请人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

发明人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： System and method for regulating a power converter. The system includes a first signal generator configured to receive at least an input signal and generate at least a first output signal associated with demagnetization and a second output signal associated with sampling. Additionally, the system includes a sampling component configured to receive at least the input signal and the second output signal, sample the input signal based on at least information associated with the second output signal, and generate at least a third output signal associated with one or more sampled magnitudes. Moreover, the system includes an error amplifier configured to receive at least the third output signal and a first threshold voltage and generate at least a fourth output signal with a capacitor, the capacitor being coupled to the error amplifier.

摘要翻译： 用于调节功率转换器的系统和方法。 该系统包括第一信号发生器，其被配置为接收至少一个输入信号并且产生与去磁有关的至少第一输出信号和与取样相关联的第二输出信号。 另外，该系统包括被配置为至少接收输入信号和第二输出信号的采样分量，至少基于与第二输出信号相关联的信息对输入信号进行采样，并且产生与一个或多个输出信号相关联的至少第三输出信号 更多采样幅度。 此外，该系统包括误差放大器，该误差放大器被配置为接收至少第三输出信号和第一阈值电压并且用电容器产生至少第四输出信号，该电容器耦合到误差放大器。