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1. 发明申请

US20110169680A1 DIGITAL-TO-ANALOG CONVERTER AND CODE MAPPING METHOD APPLIED TO THE DIGITAL-TO ANALOG CONVERTER 有权
标题翻译：适用于数字到模拟转换器的数字到模拟转换器和代码映射方法
公开(公告)号：US20110169680A1
公开(公告)日：2011-07-14
申请号：US12686354
申请日：2010-01-12
申请人： Chih-Hong Lou , Kuan-Hung Chen
发明人： Chih-Hong Lou , Kuan-Hung Chen
IPC分类号： H03M1/66
CPC分类号： H03M1/68 , H03M1/765 , H03M1/804
摘要： A digital-to-analog converter includes an operational amplifying circuit, a switched capacitor circuit, an R-string sub-circuit, and a direct-charge transfer circuit. The operational amplifying circuit has a pair of differential input ends and a pair of differential output ends. The switched capacitor circuit is coupled to the pair of differential input ends of the operational amplifying circuit. The R-string sub-circuit is coupled to the switched capacitor circuit and the pair of differential input ends of the operational amplifying circuit. The direct-charge transfer circuit is coupled to the pair of differential input ends and the pair of differential output ends of the operational amplifying circuit.
摘要翻译：数模转换器包括运算放大电路，开关电容电路，R串子电路和直接电荷转移电路。运算放大电路具有一对差分输入端和一对差分输出端。开关电容电路耦合到运算放大电路的一对差分输入端。 R串子电路耦合到开关电容器电路和运算放大电路的一对差分输入端。直接电荷传输电路耦合到运算放大电路的一对差分输入端和一对差分输出端。

2. 发明授权

US07728459B2 Power supply for real-time clock generation 有权
标题翻译：用于实时时钟生成的电源
公开(公告)号：US07728459B2
公开(公告)日：2010-06-01
申请号：US11736713
申请日：2007-04-18
申请人： Chih-Hong Lou , Chih-Yuan Hsu
发明人： Chih-Hong Lou , Chih-Yuan Hsu
IPC分类号： H02J1/00
CPC分类号： G05F1/56 , Y10T307/615 , Y10T307/625 , Y10T307/729
摘要： A power supply. The power supply provides power to a real-time clock generator when system power is not available and comprises first and second regulators, an energy storage device, and a switch. The first regulator receives a system power and generates a first regulated voltage when the system power is available. The energy storage device is coupled to a node. The second regulator comprises an input coupled to the node and provides a second regulated voltage to a real-time clock generator. The switch is coupled between the first regulator and the node. The switch is turned on when the system power is available and turned off when the system power is not available.
摘要翻译：电源。当系统电源不可用时，电源为实时时钟发生器供电，并且包括第一和第二调节器，能量存储设备和开关。当系统电源可用时，第一个调节器接收系统电源并产生第一个调节电压。能量存储装置耦合到节点。第二调节器包括耦合到节点的输入端，并向实时时钟发生器提供第二调节电压。开关耦合在第一调节器和节点之间。当系统电源可用时，开关打开，当系统电源不可用时关闭。

3. 发明申请

US20090212753A1 VOLTAGE REGULATOR HAVING FAST RESPONSE TO ABRUPT LOAD TRANSIENTS 有权
标题翻译：具有快速响应以阻止负载瞬变的电压调节器
公开(公告)号：US20090212753A1
公开(公告)日：2009-08-27
申请号：US12034674
申请日：2008-02-21
申请人： Chih-Hong Lou
发明人： Chih-Hong Lou
IPC分类号： G05F1/573 , G05F1/10
CPC分类号： G05F1/563
摘要： A voltage regulator includes an undervoltage detector having a charge transistor smaller than an output transistor of the voltage regulator, providing a detection path for fast response, compensating undervoltage without large control current when loading changes from light to heavy.
摘要翻译：电压调节器包括具有小于电压调节器的输出晶体管的电荷晶体管的欠压检测器，提供用于快速响应的检测路径，当从轻到重的负载变化时，补偿欠电压而没有大的控制电流。

4. 发明授权

US07358800B2 Programmable/tunable active RC filter 失效
标题翻译：可编程/可调谐有源RC滤波器
公开(公告)号：US07358800B2
公开(公告)日：2008-04-15
申请号：US11410096
申请日：2006-04-25
申请人： Chih-Hong Lou , Hung-I Chen
发明人： Chih-Hong Lou , Hung-I Chen
IPC分类号： H03K5/00
CPC分类号： H03H1/02 , H03H11/1291
摘要： A programmable/tunable active low-pass filter at least has the resistors, capacitors and shunt control means. It uses the resistor ladder that is structured with various fixed resistors to implement the shunt control means. The cut-off frequency of a filter is associated with the time constant, which is determined by equivalent resistance and equivalent capacitance value in the filter circuit; therefore, the filter of the present invention allowed users to fine tune the cut-off frequency linearly through the shunt control means when the variation of the environment or process parameters of manufacture cause the cut-off frequency drift, thus, the cut-off frequency can be kept in a constant value. The present invention also provides a means for programming the cut-off frequency to a desirous frequency value dependent upon the conditions of application within a big range. Thus, it can be used in many purposes widely with the same filter circuit.
摘要翻译：可编程/可调谐有源低通滤波器至少具有电阻器，电容器和分流控制装置。它使用由各种固定电阻器构成的电阻梯来实现分流控制装置。滤波器的截止频率与时间常数相关，时间常数由滤波电路中的等效电阻和等效电容值决定; 因此，本发明的滤波器允许用户通过分流控制装置线性地调节截止频率，当制造的环境或工艺参数的变化导致截止频率漂移时，因此截止频率可以保持恒定值。本发明还提供一种用于根据大范围内的应用条件将截止频率编程为期望频率值的装置。因此，它可以广泛用于许多目的，具有相同的滤波电路。

5. 发明授权

US07348851B2 Miller-compensated amplifier 有权
标题翻译：米勒补偿放大器
公开(公告)号：US07348851B2
公开(公告)日：2008-03-25
申请号：US11176177
申请日：2005-07-07
申请人： Hung-I Chen , Chih-Hong Lou
发明人： Hung-I Chen , Chih-Hong Lou
IPC分类号： H03F1/14 , H03F3/45
CPC分类号： H03F3/45183 , H03F1/086
摘要： A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain stage has the amplifier input as a first gain stage input thereto and a first gain stage output. The second gain stage has a second gain stage input, coupled to the first gain stage output, and a second gain stage output. The third gain stage has a third gain stage input, coupled to the second gain stage output, and provides an output voltage at the amplifier output. The capacitor is coupled between the amplifier output and the second gain stage input. The second gain stage amplifies a small signal part of a current received thereby and leaves a DC component thereof substantially the same.
摘要翻译：具有放大器输入和放大器输出的米勒补偿放大器包括第一增益级，第二增益级，第三增益级和电容器。第一增益级具有放大器输入作为其输入的第一增益级和第一增益级输出。第二增益级具有耦合到第一增益级输出的第二增益级输入和第二增益级输出。第三增益级具有耦合到第二增益级输出的第三增益级输入，并在放大器输出端提供输出电压。电容器耦合在放大器输出和第二增益级输入之间。第二增益级放大由此接收的电流的小信号部分，并使其DC分量基本相同。

6. 发明申请

US20080030177A1 SOFT-START CIRCUIT OF LINEAR VOLTAGE REGULATOR AND METHOD THEREOF 审中-公开
标题翻译：线性电压调节器的软启动电路及其方法
公开(公告)号：US20080030177A1
公开(公告)日：2008-02-07
申请号：US11461765
申请日：2006-08-01
申请人： Hung-I Chen , Chih-Hong Lou
发明人： Hung-I Chen , Chih-Hong Lou
IPC分类号： G05F1/00
CPC分类号： G05F1/46
摘要： A voltage regulator circuit for providing a substantially constant output voltage is disclosed. The voltage regulator circuit has a voltage regulator, a current sensing and comparing circuit, a capacitive load circuit, and a control circuit. The voltage regulator generates an output current in response to a control signal to provide the output voltage. The current sensing and comparing circuit senses the output current and outputs a result signal according to a sensed output current and a predetermined current value. The control circuit generates the control signal according to the comparison result to limit the output current. The capacitive load circuit provides the control circuit with a first capacitance when the voltage regulator circuit changes from a first mode to a second mode and provides the control circuit with a second capacitance when the voltage regulator circuit changes from the second mode to the first mode.
摘要翻译：公开了一种用于提供基本上恒定的输出电压的电压调节器电路。电压调节器电路具有电压调节器，电流检测和比较电路，电容性负载电路和控制电路。电压调节器响应于控制信号产生输出电流以提供输出电压。电流感测和比较电路感测输出电流，并根据感测的输出电流和预定的电流值输出结果信号。控制电路根据比较结果产生控制信号，以限制输出电流。当电压调节器电路从第一模式改变到第二模式时，容性负载电路为控制电路提供第一电容，并且当电压调节器电路从第二模式改变到第一模式时，向控制电路提供第二电容。

7. 发明申请

US20070278861A1 POWER SUPPLY FOR REAL-TIME CLOCK GENERATION 有权
标题翻译：电源实时时钟发生
公开(公告)号：US20070278861A1
公开(公告)日：2007-12-06
申请号：US11736713
申请日：2007-04-18
申请人： Chih-Hong Lou , Chih-Yuan Hsu
发明人： Chih-Hong Lou , Chih-Yuan Hsu
IPC分类号： H02J9/06
CPC分类号： G05F1/56 , Y10T307/615 , Y10T307/625 , Y10T307/729
摘要： A power supply. The power supply provides power to a real-time clock generator when system power is not available and comprises first and second regulators, an energy storage device, and a switch. The first regulator receives a system power and generates a first regulated voltage when the system power is available. The energy storage device is coupled to a node. The second regulator comprises an input coupled to the node and provides a second regulated voltage to a real-time clock generator. The switch is coupled between the first regulator and the node. The switch is turned on when the system power is available and turned off when the system power is not available.
摘要翻译：电源。当系统电源不可用时，电源为实时时钟发生器供电，并且包括第一和第二调节器，能量存储设备和开关。当系统电源可用时，第一个调节器接收系统电源并产生第一个调节电压。能量存储装置耦合到节点。第二调节器包括耦合到节点的输入端，并向实时时钟发生器提供第二调节电压。开关耦合在第一调节器和节点之间。当系统电源可用时，开关打开，当系统电源不可用时关闭。

8. 发明申请

US20070008036A1 Miller-compensated amplifier 有权
标题翻译：米勒补偿放大器
公开(公告)号：US20070008036A1
公开(公告)日：2007-01-11
申请号：US11176177
申请日：2005-07-07
申请人： Hung-I Chen , Chih-Hong Lou
发明人： Hung-I Chen , Chih-Hong Lou
IPC分类号： H03F3/45 , H03F1/14
CPC分类号： H03F3/45183 , H03F1/086
摘要： A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain stage has the amplifier input as a first gain stage input thereto and a first gain stage output. The second gain stage has a second gain stage input, coupled to the first gain stage output, and a second gain stage output. The third gain stage has a third gain stage input, coupled to the second gain stage output, and provides an output voltage at the amplifier output. The capacitor is coupled between the amplifier output and the second gain stage input. The second gain stage amplifies a small signal part of a current received thereby and leaves a DC component thereof substantially the same.
摘要翻译：具有放大器输入和放大器输出的米勒补偿放大器包括第一增益级，第二增益级，第三增益级和电容器。第一增益级具有放大器输入作为其输入的第一增益级和第一增益级输出。第二增益级具有耦合到第一增益级输出的第二增益级输入和第二增益级输出。第三增益级具有耦合到第二增益级输出的第三增益级输入，并在放大器输出端提供输出电压。电容器耦合在放大器输出和第二增益级输入之间。第二增益级放大由此接收的电流的小信号部分，并使其DC分量基本相同。

9. 发明授权

US06791400B2 Frequency-tuning loop used in the transconductor-capacitor filter 失效
标题翻译：用于跨导电容滤波器的调频回路
公开(公告)号：US06791400B2
公开(公告)日：2004-09-14
申请号：US10323752
申请日：2002-12-20
申请人： Chih-Hong Lou
发明人： Chih-Hong Lou
IPC分类号： H03B100
CPC分类号： H03H11/0422
摘要： A frequency-tuning loop of the invention used in the Transconductor-Capacitor filter is composed of: a first switching device and a second switching device, both having two signal-inputting ends and two signal-outputting ends for switching the output of two signals alternately from two signal-outputting ends according to a fixed clock signal. A transconductor's inputting ends linking to the two signal-outputting ends of said first switching device. One end of a first switch linking to the positive outputting end of the transconductor and the other end linking to the first capacitor and a signal-inputting end of the second switching device. One end of a second switch linking to the negative outputting end of the transconductor and the other end linking to the second capacitor and another signal-inputting end of the second switching device; and a integrated circuit composed of an integrator, a third capacitor, and a fourth capacitor. The positive and negative inputting ends linking respectively to the two signal-outputting ends of the second switching device.
摘要翻译：用于跨导体 - 电容滤波器的本发明的频率调谐回路包括：具有两个信号输入端的第一开关装置和第二开关装置，以及交替地切换两个信号的输出的两个信号输出端根据固定的时钟信号从两个信号输出端。跨导体的输入结束链接到所述第一开关装置的两个信号输出端。第一开关的一端连接到跨导体的正输出端，另一端连接到第一电容器和第二开关装置的信号输入端。连接到跨导体的负输出端的第二开关的一端和连接到第二电容器的另一端和第二开关装置的另一信号输入端; 以及由积分器，第三电容器和第四电容器组成的集成电路。正和负输入端分别连接到第二开关装置的两个信号输出端。

10. 发明授权

US08059836B2 Microphone bias circuits 失效
标题翻译：麦克风偏置电路
公开(公告)号：US08059836B2
公开(公告)日：2011-11-15
申请号：US12034672
申请日：2008-02-21
申请人： Chih-Hong Lou
发明人： Chih-Hong Lou
IPC分类号： H04R3/00
CPC分类号： H04M1/60 , H03F3/181 , H03F3/45475 , H03F3/505 , H03F2203/45136 , H03F2203/5031 , H04M1/6058 , H04R3/00
摘要： A microphone bias circuit is disclosed. A current source provides a first current. A voltage buffer provides a first reference voltage. A microphone coupled between the current source and the first reference voltage receives acoustic waves and converts the received acoustic waves to a second current. A loading device coupled between the current source and a second reference voltage lower than the first reference voltage outputs an output voltage according to the first current and the second current.
摘要翻译：公开了麦克风偏置电路。电流源提供第一电流。电压缓冲器提供第一参考电压。耦合在电流源和第一参考电压之间的麦克风接收声波并将接收到的声波转换成第二电流。耦合在电流源和低于第一参考电压的第二参考电压之间的负载装置根据第一电流和第二电流输出输出电压。

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