公开(公告)号：US20050141440A1

公开(公告)日：2005-06-30

申请号：US10749201

申请日：2003-12-31

申请人： Philip Stetson ,  Richard Hester

发明人： Philip Stetson ,  Richard Hester

IPC分类号： H04B3/03 ,  H04B3/20

CPC分类号： H04B3/20 ,  H04B3/03

摘要： Systems and methods are described herein for changing the frequency response of a filter, such as a hybrid circuit. One or more tunable components are adjustable to provide the hybrid circuit with a frequency response corresponding to the characteristics of an associated communications network, such as a digital subscriber link.

摘要翻译： 这里描述了用于改变诸如混合电路的滤波器的频率响应的系统和方法。 一个或多个可调组件是可调整的，以向混合电路提供对应于诸如数字订户链路的相关通信网络的特性的频率响应。

公开(公告)号：US20050270810A1

公开(公告)日：2005-12-08

申请号：US10862223

申请日：2004-06-07

申请人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

发明人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

IPC分类号： H02M3/28 ,  H02M3/335

CPC分类号： H02M3/335 ,  H02M3/33538 ,  H02M3/33569

摘要： A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a flyback input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

摘要翻译： 一种用于将快速转换器的工作范围扩展到低输入电压的技术。 一方面，功率转换器包括正输入电源轨和负输入电源轨。 电源转换器输入电压要施加在正负输入电源轨之间。 还包括具有回扫输入绕组和具有正向输入绕组的正向能量转移元件的反激式能量转移元件。 反激式和正向输入绕组耦合在正和负输入电源轨之间。 还包括耦合到正向能量转移元件的电压控制电路，以便当功率转换器输入电压降到低于第一阈值时，将正向输入绕组两端的电压基本上降至零。

公开(公告)号：US20070159855A1

公开(公告)日：2007-07-12

申请号：US11724004

申请日：2007-03-13

申请人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

发明人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M3/33538 ,  H02M3/33569

摘要： A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a flyback input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

摘要翻译： 一种用于将快速转换器的工作范围扩展到低输入电压的技术。 一方面，功率转换器包括正输入电源轨和负输入电源轨。 电源转换器输入电压要施加在正负输入电源轨之间。 还包括具有回扫输入绕组和具有正向输入绕组的正向能量转移元件的反激式能量转移元件。 反激式和正向输入绕组耦合在正和负输入电源轨之间。 还包括耦合到正向能量转移元件的电压控制电路，以便当功率转换器输入电压降到低于第一阈值时，将正向输入绕组两端的电压基本上降至零。

公开(公告)号：US20060203523A1

公开(公告)日：2006-09-14

申请号：US11432968

申请日：2006-05-12

申请人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

发明人： Arthur Odell ,  Richard Hester ,  Jason Cuadra

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M3/33538 ,  H02M3/33569

摘要： A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a first input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

摘要翻译： 一种用于将快速转换器的工作范围扩展到低输入电压的技术。 一方面，功率转换器包括正输入电源轨和负输入电源轨。 电源转换器输入电压要施加在正负输入电源轨之间。 还包括具有第一输入绕组和具有正向输入绕组的正向能量转移元件的回扫能量传递元件。 反激式和正向输入绕组耦合在正和负输入电源轨之间。 还包括耦合到正向能量转移元件的电压控制电路，以便当功率转换器输入电压降到低于第一阈值时，将正向输入绕组两端的电压基本上降至零。

公开(公告)号：US20060062288A1

公开(公告)日：2006-03-23

申请号：US11231248

申请日：2005-09-20

申请人： Richard Hester

发明人： Richard Hester

IPC分类号： H04L5/16

CPC分类号： H04L5/1438 ,  H04B3/32 ,  H04L27/2601

摘要： A digital subscriber line (DSL) modem for a service area interface, which controls the power of its downstream transmissions to minimize far-end crosstalk (FEXT), is disclosed. The disclosed modem has an interface to a low-attenuation upstream facility, such as fiber optic, and includes a digital transceiver and an analog front end that is coupled to a twisted-pair wire facility in a binder. The modem also includes a memory location for storing the feeder distance between a DSL central office and the service area interface, the service area interface also coupled to a subscriber of the CO-fed communications via twisted-pair wire. Power cutback levels are applied to the downstream transmissions from the modem according to the feeder distance, so that the FEXT on the CO-fed signal is minimized without undue data rate degradation.

摘要翻译： 公开了一种用于控制其下游传输的功率以最小化远端串扰（FEXT）的服务区接口的数字用户线（DSL）调制解调器。 所公开的调制解调器具有到诸如光纤的低衰减上游设施的接口，并且包括数字收发器和耦合到绑定器中的双绞线设备的模拟前端。 调制解调器还包括存储位置，用于存储DSL中心局和服务区域接口之间的馈线距离，服务区域接口还通过双绞线与CO馈电通信的用户耦合。 根据馈线距离，将来自调制解调器的下行传输功率削减电平应用于CO馈电信号上的FEXT，而不会造成不必要的数据速率降低。

公开(公告)号：US06366230B1

公开(公告)日：2002-04-02

申请号：US09589406

申请日：2000-06-07

申请人： Weibiao Zhang ,  Donald C. Richardson ,  Richard Hester

发明人： Weibiao Zhang ,  Donald C. Richardson ,  Richard Hester

IPC分类号： H03M134

CPC分类号： H03M1/167 ,  H03M1/361 ,  H03M1/442

摘要： A pipelined analog-to-digital converter includes a first stage 700 of an analog-to-digital converter having a first resolution. The first stage 700 includes a three capacitor switched capacitor circuit. The analog-to-digital converter further includes one or more subsequent analog-to-digital converter stages 200. The first and subsequent stages 700 and 200 are pipelined together to provide a digital output signal.

摘要翻译： 流水线模数转换器包括具有第一分辨率的模数转换器的第一级700。 第一级700包括三电容器开关电容器电路。 模数转换器还包括一个或多个后续的模数转换器级200.第一级和后级级700和200被流水线化在一起以提供数字输出信号。