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。

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。

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。

公开(公告)号：US20090214057A1

公开(公告)日：2009-08-27

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： G09F27/00

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。

公开(公告)号：US07498780B2

公开(公告)日：2009-03-03

申请号：US11739115

申请日：2007-04-24

申请人： Hung-I Chen ,  Chih-Hong Lou

发明人： Hung-I Chen ,  Chih-Hong Lou

IPC分类号： G05F1/40 ,  G05F1/56

CPC分类号： G05F1/571 ,  G05F1/575 ,  G05F3/262

摘要： A voltage regulating circuit for providing a regulated output voltage. The voltage regulating circuit includes a voltage regulator, a converting circuit, a capacitive device, a first current mirror module, and a second current mirror module. The voltage regulator has a first output producing the regulated output voltage and a second output producing a pass voltage. The converting circuit converts the pass voltage into a first current and a second current passing through a first converting node and a second converting node respectively, where the first current charges/discharges the capacitive device. The first current mirror module has a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node. The second current mirror module has a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output.

摘要翻译： 一种用于提供调节输出电压的电压调节电路。 电压调节电路包括电压调节器，转换电路，电容性装置，第一电流镜模块和第二电流镜模块。 电压调节器具有产生调节输出电压的第一输出和产生通过电压的第二输出。 转换电路将通过电压转换成分别通过第一转换节点和第二转换节点的第一电流和第二电流，其中第一电流对电容性装置充电/放电。 第一当前镜像模块具有耦合到第一转换节点的第一电流镜像路径和耦合到第二转换节点的第二电流镜像路径。 第二电流镜模块具有耦合到第二转换节点的第一电流镜像路径和耦合到第一输出的第二电流镜像路径。

公开(公告)号：US07102419B2

公开(公告)日：2006-09-05

申请号：US11080514

申请日：2005-03-16

申请人： Chih-Hong Lou ,  Yen-Jen Liu

发明人： Chih-Hong Lou ,  Yen-Jen Liu

IPC分类号： G11C5/14

CPC分类号： G11C29/021 ,  G11C5/147 ,  G11C29/028

摘要： A bias generator that automatically adjusts its slew rate is disclosed to generate an output bias current and adjust the output bias current according to the frequency of a clock signal. The slew rate of the amplifier is thus controlled to save power. It includes: a current mirror for receiving a feedback voltage and generating an output bias current; a storage capacitor with a first end and a second end and the latter being coupled to the ground; a charging switch coupled between the output of the current mirror and the first end of the storage capacitor; a discharging switch coupled between the first end of the storage capacitor and the ground; a comparator whose input is coupled to the first end of the storage capacitor and a reference voltage; and a feedback unit coupled to the output of the comparator for outputting a feedback voltage to the current mirror.

摘要翻译： 公开了一种自动调整其转换速率的偏置发生器，以产生输出偏置电流，并根据时钟信号的频率调整输出偏置电流。 因此，放大器的转换速率被控制以节省功率。 它包括：用于接收反馈电压并产生输出偏置电流的电流镜; 存储电容器，其具有第一端和第二端，后者耦合到地; 连接在电流镜的输出端和存储电容器的第一端之间的充电开关; 耦合在存储电容器的第一端和地之间的放电开关; 比较器，其输入耦合到存储电容器的第一端和参考电压; 以及耦合到比较器的输出的反馈单元，用于向电流镜输出反馈电压。

公开(公告)号：US20060125566A1

公开(公告)日：2006-06-15

申请号：US11075655

申请日：2005-03-10

申请人： Chih-Hong Lou ,  Chia-Chun Liu

发明人： Chih-Hong Lou ,  Chia-Chun Liu

IPC分类号： H03F3/04

CPC分类号： H03F3/45273 ,  G05F3/262 ,  H03F3/45475 ,  H03F2203/45096 ,  H03F2203/45288 ,  H03F2203/45521

摘要： A current mirror with a transconductance amplifier containing the current mirror with a low static current. The current mirror includes: a load with first end and a second end, the first end coupling to a first input current and a fixed voltage difference existing between the first and second ends; a first transistor, whose drain is coupled to the second end of the load, whose gate is coupled to the first end of the load, and whose source is coupled to a second input current; and a second transistor, whose drain is coupled to a third port and an output current, whose gate is coupled to the second end of the load, and whose source is coupled to the ground. The transconductance amplifier contains: a voltage amplifier stage, a transconductance stage, and a current amplifier stage for amplifying the current and containing the current mirror.

摘要翻译： 具有跨导放大器的电流镜，其包含具有低静态电流的电流镜。 电流镜包括：具有第一端和第二端的负载，第一端耦合到第一输入电流和存在于第一端和第二端之间的固定电压差; 第一晶体管，其漏极耦合到负载的第二端，其栅极耦合到负载的第一端，并且其源耦合到第二输入电流; 以及第二晶体管，其漏极耦合到第三端口和输出电流，其栅极耦合到负载的第二端，并且其源极耦合到地。 跨导放大器包括：电压放大器级，跨导级和用于放大电流并包含电流镜的电流放大器级。

公开(公告)号：US20110260895A1

公开(公告)日：2011-10-27

申请号：US13175887

申请日：2011-07-04

申请人： Chih-Hong Lou ,  Kuan-Hung Chen

发明人： Chih-Hong Lou ,  Kuan-Hung Chen

IPC分类号： H03M7/20

CPC分类号： H03M1/68 ,  H03M1/765 ,  H03M1/804

摘要： A code mapping method includes: providing M bits of digital input codes; checking the 1st bit of the M bits to generate a checking result; determining whether to perform 2's compliment operation on the 2nd to Mth bits according to the checking result; and converting the 1st to Nth bits of the M bits into P bits according to a designated mapping manner.

摘要翻译： 码映射方法包括：提供M位数字输入码; 检查M位的第1位以产生检查结果; 根据检查结果确定是否对第二至第M位执行2的补码操作; 以及根据指定的映射方式将M比特的第1比特到第N比特转换成P比特。

公开(公告)号：US07193455B2

公开(公告)日：2007-03-20

申请号：US10923892

申请日：2004-08-24

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： H03H11/1291 ,  H03H11/04

摘要： A programmable/tunable active low-pass filter at least has the resistors, capacitors and shunt control devices. It uses the linear property of the MOSFET to implement the shunt control devices. Based on the first-ordered linear analysis of the transfer function of the active-RC filter, it is found that the cut-off frequency of the active-RC filter can be tuned via the effective small-signal current controlled by the shunt control devices. Therefore, the filter of the present invention allowed users for fine tune the cut-off frequency linearly through the shunt control devices when the variation of the environment or procedure parameters of manufacture (i.e. thermo-effects) cause the cut-off frequency drift, thus, the cut-off frequency can be kept in a constant value. In addition, it needs the different cut-off frequency from the different application. The present invention also provides a device for programming the cut-off frequency to a desired frequency value dependent upon the conditions of application within a big range. Thus, the same filter circuit can be used in many purposes widely.

摘要翻译： 可编程/可调谐有源低通滤波器至少具有电阻器，电容器和分流控制器件。 它使用MOSFET的线性特性来实现分流控制器件。 基于有源RC滤波器传递函数的一阶线性分析，发现有源RC滤波器的截止频率可以通过由分流控制装置控制的有效小信号电流进行调谐 。 因此，本发明的滤波器允许用户在制造的环境或程序参数的变化（即，热效应）引起截止频率偏移时通过分流控制装置线性地微调截止频率，因此 ，截止频率可以保持在恒定值。 此外，它需要不同应用的截止频率。 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，相同的滤波器电路可以广泛用于许多目的。

公开(公告)号：US20050248394A1

公开(公告)日：2005-11-10

申请号：US10923892

申请日：2004-08-24

申请人： Chih-Hong Lou ,  Hung-I Chen

发明人： Chih-Hong Lou ,  Hung-I Chen

IPC分类号： H03H7/06 ,  H03H11/04 ,  H03H11/12 ,  H03L7/00

CPC分类号： H03H11/1291 ,  H03H11/04

摘要： A programmable/tunable active low-pass filter at least has the resistors, capacitors and shunt control devices. It uses the linear property of the MOSFET to implement the shunt control devices. Based on the first-ordered linear analysis of the transfer function of the active-RC filter, it is found that the cut-off frequency of the active-RC filter can be tuned via the effective small-signal current controlled by the shunt control devices. Therefore, the filter of the present invention allowed users for fine tune the cut-off frequency linearly through the shunt control devices when the variation of the environment or procedure parameters of manufacture (i.e. thermo-effects) cause the cut-off frequency drift, thus, the cut-off frequency can be kept in a constant value. In addition, it needs the different cut-off frequency from the different application. The present invention also provides a device for programming the cut-off frequency to a desired frequency value dependent upon the conditions of application within a big range. Thus, the same filter circuit can be used in many purposes widely.

摘要翻译： 可编程/可调谐有源低通滤波器至少具有电阻器，电容器和分流控制器件。 它使用MOSFET的线性特性来实现分流控制器件。 基于有源RC滤波器传递函数的一阶线性分析，发现有源RC滤波器的截止频率可以通过由分流控制装置控制的有效小信号电流进行调谐 。 因此，本发明的滤波器允许用户在制造的环境或程序参数的变化（即，热效应）引起截止频率偏移时通过分流控制装置线性地微调截止频率，因此 ，截止频率可以保持在恒定值。 此外，它需要不同应用的截止频率。 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，相同的滤波器电路可以广泛用于许多目的。