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1. 发明授权

US06844709B2 Programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current 失效
标题翻译：可编程电压监控电路和方法，具有最小编程引脚和低静态电流
公开(公告)号：US06844709B2
公开(公告)日：2005-01-18
申请号：US10283062
申请日：2002-10-30
申请人： Chao-Hsuan Chuang , Jing-Meng Liu , Cheng-Hsuan Fan , Kent Hwang
发明人： Chao-Hsuan Chuang , Jing-Meng Liu , Cheng-Hsuan Fan , Kent Hwang
IPC分类号： G05F1/565 , G05F1/40 , G05F1/618
CPC分类号： G05F1/565
摘要： A programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current is provided to monitor a supply voltage, by which only one programming pin can configure three voltage levels for the threshold voltage to be compared to the supply voltage. The programming pin is connected with a voltage select signal that is defined to be high, low or floating states each determines a setting voltage among three levels corresponding to the three threshold voltages, respectively, by a voltage select circuit. A sample/hold circuit in combination with a switch arrangement is further connected to the voltage select circuit such that the programmable voltage supervisory circuit is only operationable during the duty of a clock and thereby to reduce the power consumption thereof by squeezing the duty.
摘要翻译：提供了具有最小编程引脚和低静态电流的可编程电压监控电路和方法来监视电源电压，只有一个编程引脚可以配置三个电压电平，以将阈值电压与电源电压进行比较。编程引脚与被定义为高，低或浮置状态的电压选择信号连接，分别通过电压选择电路确定对应于三个阈值电压的三个电平之间的设定电压。与开关装置组合的采样/保持电路还与电压选择电路连接，使得可编程电压监控电路仅在时钟的占空比期间可操作，从而通过压缩占空比来减少其功耗。

2. 发明授权

US06747508B2 Resistance mirror circuit 失效
标题翻译：电阻镜电路
公开(公告)号：US06747508B2
公开(公告)日：2004-06-08
申请号：US10229160
申请日：2002-08-28
申请人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
发明人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
IPC分类号： G05F110
CPC分类号： G05F3/262
摘要： A resistance adjustable of resistance mirror circuit having a master resistor R0, a reference current source terminal providing a current value I0 through the master resistor R0 to ground; a first transistor; a current mirror source terminal providing a current value n I0, through the first transistor to ground; an operational amplifier having a positive terminal connecting to a drain of the first transistor, a negative terminal connecting to the other terminal of the master resistor R0, and an output terminal connecting to a gate of the first transistor; a mirror resistor set composed of a plurality of transistors in parallel each other and having their source electrode connecting to ground. Each transistor of the mirror resistor set has a ratio of channel width over channel length being m-fold of that of the first transistor, where m, n is any positive numbers. Since gates of the transistors connect to the output terminal of the operational amplifier, each of the transistors therefore has an equivalent resistance Req=(1/nm)R0.
摘要翻译：电阻镜电路的电阻可调，具有主电阻器R0，参考电流源端子通过主电阻器R0接地提供电流值I0; 第一晶体管; 电流镜源端子，通过第一晶体管接地提供电流值n I0; 具有连接到第一晶体管的漏极的正端子的运算放大器，连接到主电阻器R0的另一端子的负极端子和连接到第一晶体管的栅极的输出端子; 由多个彼此并联的晶体管组成并且其源电极连接到地的镜电阻器组。镜面电阻器组的每个晶体管的沟道宽度与沟道长度的比率与第一晶体管的沟道长度的m倍成正比，其中m，n是任何正数。由于晶体管的栅极连接到运算放大器的输出端，因此每个晶体管具有等效电阻Req =（1 / nm）R0。

3. 发明授权

US07180886B2 Synchronized data communication on a one-wired bus 失效
标题翻译：在单线总线上同步数据通信
公开(公告)号：US07180886B2
公开(公告)日：2007-02-20
申请号：US10153784
申请日：2002-05-24
申请人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
发明人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
IPC分类号： H04J3/06 , H04L12/50
CPC分类号： H04L25/4923 , H04L7/06 , H04L25/4904
摘要： In a synchronized data communication on a one-wired bus, it transmits and receives a synchronizing signal that segments part of or all proportions of the data signal by use of three electrically distinguishable statuses for the identifier of the synchronizing signal and the logic states of the data signal to increase the endurance of frequency displacement and resist influences of the interference of external conditions, low quality of transmission medium, and limitation of transmission distance and make the reliability and correctness of the signal transmission improve substantially. It is also clearly illustrated the feasibility and simplicity for implementing the one-wired synchronized communication by a plurality of exemplary signal types and a transceiver circuitry.
摘要翻译：在单线总线上的同步数据通信中，它发送和接收同步信号，该同步信号通过使用用于同步信号的标识符的三个电可区分状态以及数据信号的逻辑状态来分割数据信号的一部分或全部比例数据信号增加频率位移的耐久性，抵抗外部条件干扰，传输介质质量差，传输距离限制的影响，使信号传输的可靠性和正确性大大提高。还清楚地示出了通过多个示例性信号类型和收发器电路来实现单线同步通信的可行性和简单性。

4. 发明授权

US06809616B2 Inductor equivalent circuit and application thereof 失效
标题翻译：电感等效电路及其应用
公开(公告)号：US06809616B2
公开(公告)日：2004-10-26
申请号：US10342183
申请日：2003-01-15
申请人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
发明人： Jing-Meng Liu , Kent Hwang , Chao-Hsuan Chuang , Cheng-Hsuan Fan
IPC分类号： H03H1100
CPC分类号： H03H11/485 , H03H11/48
摘要： An inductor equivalent circuit is disclosed. The circuit comprises a reference current source, a first current mirror, a second current mirror, two operational amplifiers OP1 and OP2, a capacitor, a first transistor, a second transistor, a mirror resistor set, and a bypass current source in parallel with the capacitor. An input signal is through OP1 and second transistor to control the reference current source. The first mirror current is then feed-back a signal to the first transistor through an OP2. The current signal makes the drain current of the first transistor lags the input voltage signal by 90° due to the capacitor coupled with the first mirror current source. The mirror resistor set can be resistors having one common terminal grounded, and other terminals each, respectively, coupled with the first and the second transistor and the capacitor, or can be composed of transistors and all of them with gate property biased so that the transistors in the mirror resistor set are operated in an ohmic region. The second mirror current provides an output current of the inductor equivalent circuit for next cascade stage.
摘要翻译：公开了一种电感器等效电路。该电路包括参考电流源，第一电流镜，第二电流镜，两个运算放大器OP1和OP2，电容器，第一晶体管，第二晶体管，反射镜电阻器组以及旁路电流源电容器。输入信号通过OP1和第二晶体管来控制参考电流源。然后通过OP2将第一镜电流反馈到第一晶体管。由于与第一反射镜电流源耦合的电容器，电流信号使得第一晶体管的漏极电流滞留输入电压信号90°。镜电阻器组可以是具有一个公共端子接地的电阻器，并且其他端子分别与第一和第二晶体管和电容器耦合，或者可以由晶体管组成，并且所有这些端子都具有偏置的栅极特性，使得晶体管镜面电阻组在欧姆区域工作。第二镜电流为下一级联级提供电感等效电路的输出电流。

5. 发明申请

US20050162361A1 Frame-shifted dynamic gamma correction method and system 审中-公开
标题翻译：帧移动态伽马校正方法和系统
公开(公告)号：US20050162361A1
公开(公告)日：2005-07-28
申请号：US11040024
申请日：2005-01-24
申请人： Chao-Hsuan Chuang , Yiu-I Lin , Nien-Hui Kung , Der-Jiunn Wang , Jing-Meng Liu
发明人： Chao-Hsuan Chuang , Yiu-I Lin , Nien-Hui Kung , Der-Jiunn Wang , Jing-Meng Liu
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36 , H04N5/202
CPC分类号： G09G3/3611 , G06T5/009 , G06T5/40 , G09G2320/0276 , G09G2340/16
摘要： A frame-shifted technique is disclosed for a dynamic gamma correction method and system that comprises counting the gray levels of each frame to figure out the probability distribution of gray levels in the current frame, and determining the gamma reference voltages according to the probability distribution of gray levels of the current frame for the gamma correction of the next frame.
摘要翻译：公开了一种用于动态伽马校正方法和系统的帧移动技术，其包括对每帧的灰度级进行计数，以计算当前帧中的灰度级的概率分布，并根据概率分布来确定伽马参考电压当前帧的灰度级，用于下一帧的伽马校正。

6. 发明授权

US07271802B2 Dual panel display backlight power controller chip for handheld apparatus 失效
标题翻译：双面板显示背光电源控制芯片，用于手持设备
公开(公告)号：US07271802B2
公开(公告)日：2007-09-18
申请号：US10846585
申请日：2004-05-17
申请人： Der-Jiunn Wang , Jing-Meng Liu , Chao-Hsuan Chuang , Nien-Hui Kung , Wen-Hung Huang
发明人： Der-Jiunn Wang , Jing-Meng Liu , Chao-Hsuan Chuang , Nien-Hui Kung , Wen-Hung Huang
IPC分类号： G06F1/30
CPC分类号： G09G3/342 , G09G3/3208 , G09G2320/0606 , G09G2320/0626 , G09G2330/02
摘要： A backlight power controller chip comprises a control circuit connected to two switches to turn on and off two display panels of a dual panel display handheld apparatus. The controller chip individually switches the two switches to control the backlight sources of the two display panels. The controller chip is available for various types of display panels.
摘要翻译：背光源功率控制器芯片包括连接到两个开关的控制电路以打开和关闭双面板显示器手持设备的两个显示面板。控制器芯片单独切换两个开关以控制两个显示面板的背光源。控制器芯片可用于各种类型的显示面板。

7. 发明授权

US07388592B2 Gamma voltage generator and method thereof for generating individually tunable gamma voltages 失效
标题翻译：伽马电压发生器及其方法，用于产生单独的可调伽马电压
公开(公告)号：US07388592B2
公开(公告)日：2008-06-17
申请号：US10765039
申请日：2004-01-28
申请人： Chao-Hsuan Chuang , Jing-Meng Liu , Shin-Lung Ho , Wen-Hung Huang , Cheng-Yuan Chang
发明人： Chao-Hsuan Chuang , Jing-Meng Liu , Shin-Lung Ho , Wen-Hung Huang , Cheng-Yuan Chang
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3611 , G09G2320/0276
摘要： In a gamma voltage generator and gamma voltage generating method that can tune the gamma voltages individually, several gamma currents of a same magnitude are generated for each to flow through a variable resistive element to generate a variable common voltage and several variable voltages, from which a common gamma voltage and several first gamma voltages are generated. By use of the symmetric property of the gamma curve corresponding to those gamma voltages to be generated, several voltages are generated by mapping the first gamma voltages with the common gamma voltage as the center axis, and from which several second gamma voltages are derived. The common gamma voltage and the first and second gamma voltages are provided for those gamma voltages corresponding to the gamma curve.
摘要翻译：在可以单独调节伽马电压的伽马电压发生器和伽马电压产生方法中，产生相同幅度的几个伽马电流，每个伽玛电流流过可变电阻元件以产生可变公共电压和若干可变电压，产生常见的伽马电压和几个第一伽马电压。通过使用对应于要产生的那些伽马电压的伽马曲线的对称性，通过将第一伽马电压与公共伽马电压作为中心轴进行映射，并从中导出数个第二伽马电压，产生几个电压。对于与伽马曲线对应的那些伽马电压，提供常见的伽马电压和第一和第二伽马电压。

8. 发明授权

US07099127B2 High-side short-circuit protection for a voltage converter 有权
标题翻译：电压转换器的高端短路保护
公开(公告)号：US07099127B2
公开(公告)日：2006-08-29
申请号：US10653101
申请日：2003-09-03
申请人： Chao-Hsuan Chuang , Peng-Ju Lan , Hsien-Ming Chiu , Jing-Meng Liu
发明人： Chao-Hsuan Chuang , Peng-Ju Lan , Hsien-Ming Chiu , Jing-Meng Liu
IPC分类号： H02H7/00
CPC分类号： H02M1/38
摘要： In a voltage converter with a high-side short-circuit protection before an input voltage provided by a high-voltage power supply reaches a first threshold, a driver detects the input voltage and the output voltage of the converter to turn on the low-side transistor of the converter and turn off the high-voltage power supply when the input voltage ranges between the first threshold and a second threshold and the output voltage reaches a third threshold, to thereby avoid damages to the circuit connected to the output node of the converter. The driver comprises a front-end drive circuit to switch the high-side and low-side transistors and a low-voltage logic control circuit for the turning-on of the low-side transistor.
摘要翻译：在由高压电源提供的输入电压达到第一阈值之前具有高侧短路保护的电压转换器中，驱动器检测转换器的输入电压和输出电压以使低侧晶体管，当输入电压范围在第一阈值和第二阈值之间并且输出电压达到第三阈值时，关闭高压电源，从而避免损坏连接到转换器的输出节点的电路。驱动器包括用于切换高侧和低侧晶体管的前端驱动电路和用于低侧晶体管导通的低压逻辑控制电路。

9. 发明授权

US06703885B1 Trimmer method and device for circuits 失效
标题翻译：微调方法和电路设备
公开(公告)号：US06703885B1
公开(公告)日：2004-03-09
申请号：US10245390
申请日：2002-09-18
申请人： Cheng-Hsuan Fan , Jing-Meng Liu
发明人： Cheng-Hsuan Fan , Jing-Meng Liu
IPC分类号： H03L500
CPC分类号： G05F1/56
摘要： In a trimmer method and device, a reference signal of a target circuit is compared with a test signal, and a binary count output is generated according to result of the comparison. Thereafter, according to logic states of bits of the binary count output, electrical conduction through passive components that are coupled to the target circuit and that correspond respectively to the bits of the binary count output are selectively enabled and disabled so as to adjust the reference signal. The above steps are repeated by varying the binary count output until the reference signal approximates the test signal. Thereafter, fuses coupled to the passive components are melted selectively in a single fuse-melting operation so as to maintain the enabled and disabled states of electrical conduction through the passive components in order to set the reference signal to be approximate to the test signal.
摘要翻译：在微调方法和装置中，将目标电路的参考信号与测试信号进行比较，并根据比较结果生成二进制计数输出。此后，根据二进制计数输出的位的逻辑状态，选择性地使能和禁止耦合到目标电路并且分别对应于二进制计数输出的位的无源分量的电传导，以便调整参考信号。通过改变二进制计数输出重复上述步骤，直到参考信号近似于测试信号。此后，耦合到无源部件的熔丝在单熔丝熔化操作中选择性熔化，以便通过无源部件保持启用和禁用的导电状态，以将参考信号设置为接近测试信号。

10. 发明申请

US20160218617A1 POWER SUPPLY CIRCUIT WITH PFC FUNCTION, AND AUTOMATIC GAIN CONTROL CIRCUIT THEREFOR AND CONTROL METHOD THEREOF 审中-公开
公开(公告)号：US20160218617A1
公开(公告)日：2016-07-28
申请号：US15092014
申请日：2016-04-06
申请人： Chia-Wei Liao , Jing-Meng Liu
发明人： Chia-Wei Liao , Jing-Meng Liu
IPC分类号： H02M1/42 , H02M1/08 , G05F3/26
CPC分类号： H02M1/42 , G05F3/262 , H02M1/08 , H02M1/126 , H02M1/4208 , H02M2001/0009 , Y02B70/126
摘要： The present invention discloses a power supply circuit with power factor correction (PFC) function, and an automatic gain control circuit therefor and a control method thereof. The power supply circuit includes the automatic gain control circuit and a load driver circuit. The automatic gain control circuit converts an input voltage to a regulation voltage, and the load driver circuit generates an output current according to the regulation voltage. The automatic gain control circuit automatically adjust the regulation voltage such that the regulation voltage has a substantially fixed amplitude or fixed average value under different input voltages of different specifications, and the output current provided by the load driver circuit varies in phase with the input voltage to provide a PFC function.

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