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：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。

公开(公告)号：US20080265853A1

公开(公告)日：2008-10-30

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： G05F1/08

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：US07057451B2

公开(公告)日：2006-06-06

申请号：US10919234

申请日：2004-08-17

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。

公开(公告)号：US20050242873A1

公开(公告)日：2005-11-03

申请号：US10919233

申请日：2004-08-17

申请人： Hung-I Chen ,  Chih-Hong Lou

发明人： Hung-I Chen ,  Chih-Hong Lou

IPC分类号： H03B1/00 ,  H03H1/02 ,  H03H11/12

CPC分类号： H03H11/1291

摘要： A tuning loop which can tune the cut-off frequency of an active RC filter is disclosed. The cut-off frequency is determined by equivalent resistance and equivalent capacitance in an active RC filter, therefore, the tuning loop changes the equivalent resistance to tune the cut-off frequency. The time constant of the circuit is compared to see if it is equal to the applied preset time cycle after the equivalent resistance value is changed. The cut-off frequency of the filter is tuned to a preset value when the time constant in the circuit is equal to the applied preset time cycle, or the equivalent should be changed until the time constant equal to the applied preset time cycle. A precise result can be obtained after being tuned by tuning loop due to the each component of the tuning loop are operated in an environment which is equivalent to the active RC filter.

摘要翻译： 公开了可以调节有源RC滤波器的截止频率的调谐回路。 截止频率由有源RC滤波器中的等效电阻和等效电容决定，因此，调谐环改变等效电阻以调节截止频率。 比较电路的时间常数，以查看等效电阻值改变后是否等于施加的预设时间周期。 当电路中的时间常数等于应用的预设时间周期时，滤波器的截止频率被调谐到预设值，或者应该改变等效直到时间常数等于所应用的预设时间周期。 在通过调谐回路进行调谐后可以获得精确的结果，因为调谐回路的每个分量在等效于有源RC滤波器的环境中运行。

公开(公告)号：US07279962B2

公开(公告)日：2007-10-09

申请号：US10919233

申请日：2004-08-17

申请人： Hung-I Chen ,  Chih-Hong Lou

发明人： Hung-I Chen ,  Chih-Hong Lou

IPC分类号： H03K5/00

CPC分类号： H03H11/1291

摘要： A tuning loop which can tune the cut-off frequency of an active RC filter is disclosed. The cut-off frequency is determined by equivalent resistance and equivalent capacitance in an active RC filter, therefore, the tuning loop changes the equivalent resistance to tune the cut-off frequency. The time constant of the circuit is compared to see if it is equal to the applied preset time cycle after the equivalent resistance value is changed. The cut-off frequency of the filter is tuned to a preset value when the time constant in the circuit is equal to the applied preset time cycle, or the equivalent should be changed until the time constant equal to the applied preset time cycle. A precise result can be obtained after being tuned by tuning loop due to the each component of the tuning loop are operated in an environment which is equivalent to the active RC filter.

摘要翻译： 公开了可以调节有源RC滤波器的截止频率的调谐回路。 截止频率由有源RC滤波器中的等效电阻和等效电容决定，因此，调谐环改变等效电阻以调节截止频率。 比较电路的时间常数，以查看等效电阻值改变后是否等于施加的预设时间周期。 当电路中的时间常数等于应用的预设时间周期时，滤波器的截止频率被调谐到预设值，或者应该改变等效直到时间常数等于所应用的预设时间周期。 在通过调谐回路进行调谐后可以获得精确的结果，因为调谐回路的每个分量在等效于有源RC滤波器的环境中运行。

公开(公告)号：US20060186952A1

公开(公告)日：2006-08-24

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： H03B1/00

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.

公开(公告)号：US20050242872A1

公开(公告)日：2005-11-03

申请号：US10919234

申请日：2004-08-17

申请人： Chih-Hong Lou ,  Hung-I Chen

发明人： Chih-Hong Lou ,  Hung-I Chen

IPC分类号： H03H1/02 ,  H03H11/12 ,  H03L7/00

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。

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。