公开(公告)号：US07561865B2

公开(公告)日：2009-07-14

申请号：US11536900

申请日：2006-09-29

申请人： Ligang Zhang ,  Scott D. Willingham ,  Peter J. Vancorenland ,  Yunteng Huang

发明人： Ligang Zhang ,  Scott D. Willingham ,  Peter J. Vancorenland ,  Yunteng Huang

IPC分类号： H04B1/10

CPC分类号： H03J5/244 ,  H03J2200/10

摘要： A communications device including communications circuitry, tunable filter circuitry including a node configured to pass a signal between an antenna and the communication circuitry, and control circuitry configured to cause energy in the tunable filter circuitry to be adjusted for a time period and configured to determine a resonant frequency of the tunable filter circuitry from oscillations on the node caused by the energy subsequent to the time period is provided.

摘要翻译： 包括通信电路的通信设备，包括被配置为在天线和通信电路之间传递信号的节点的可调谐滤波器电路以及被配置为使得可调滤波器电路中的能量被调整一段时间并被配置为确定 提供可调谐滤波器电路的谐振频率与由该时间段之后的能量引起的节点上的振荡。

公开(公告)号：US20080081583A1

公开(公告)日：2008-04-03

申请号：US11536900

申请日：2006-09-29

申请人： Ligang Zhang ,  Scott D. Willingham ,  Peter J. Vancorenland ,  Yunteng Huang

发明人： Ligang Zhang ,  Scott D. Willingham ,  Peter J. Vancorenland ,  Yunteng Huang

IPC分类号： H04B1/18

CPC分类号： H03J5/244 ,  H03J2200/10

摘要： A communications device including communications circuitry, tunable filter circuitry including a node configured to pass a signal between an antenna and the communication circuitry, and control circuitry configured to cause energy in the tunable filter circuitry to be adjusted for a time period and configured to determine a resonant frequency of the tunable filter circuitry from oscillations on the node caused by the energy subsequent to the time period is provided.

摘要翻译： 包括通信电路的通信设备，包括被配置为在天线和通信电路之间传递信号的节点的可调谐滤波器电路以及被配置为使得可调滤波器电路中的能量被调整一段时间并被配置为确定 提供可调谐滤波器电路的谐振频率与由该时间段之后的能量引起的节点上的振荡。

公开(公告)号：US07236024B2

公开(公告)日：2007-06-26

申请号：US11239943

申请日：2005-09-30

申请人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

发明人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

IPC分类号： H03L7/06

CPC分类号： G06F7/68 ,  H03L7/183 ,  H03L7/23

摘要： A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal frequency is preferably chosen at a value in which potential interference signals do not have much energy. The first loop preferably has low bandwidth to provide good input jitter attenuation, while second loop preferably has higher bandwidth to reduce phase noise of the output signal. The circuit preferably provides for a choice of several different intermediate frequencies to allow use where different intermediate frequencies may exist in each system. Moreover, in a system having two such dual-loop PLL circuits, each can be configured with a different intermediate frequency, so that interference from one to the other is reduced.

摘要翻译： PLL功能可以实现为具有从参考信号产生中间信号的第一PLL电路的双回路结构，以及从中间信号产生输出信号的第二PLL电路。 中间信号频率优选地被选择为其中潜在的干扰信号没有太多能量的值。 第一环路优选具有低带宽以提供良好的输入抖动衰减，而第二环路优选地具有较高带宽以减少输出信号的相位噪声。 该电路优选地提供几种不同中频的选择，以允许在每个系统中可能存在不同中频的应用。 此外，在具有两个这样的双回路PLL电路的系统中，每个都可以配置有不同的中频，从而减少了从一个到另一个的干扰。

公开(公告)号：US07253693B2

公开(公告)日：2007-08-07

申请号：US11004022

申请日：2004-12-03

申请人： Ligang Zhang ,  Yunteng Huang

发明人： Ligang Zhang ,  Yunteng Huang

IPC分类号： H03B1/04 ,  H03B5/12 ,  H03C3/22

CPC分类号： H03B5/04 ,  H03L7/099

摘要： A variable capacitance circuit includes a first and a second capacitor. A switch having an associated first nonlinear capacitance, selectively couples the first and second capacitors. To compensate for the first nonlinear capacitance, a second nonlinear capacitance is coupled to the switch that has a capacitance value responsive to a change in voltage that moves in a direction of change opposite to a direction of change of the first nonlinear capacitance.

摘要翻译： 可变电容电路包括第一和第二电容器。 具有相关联的第一非线性电容的开关选择性地耦合第一和第二电容器。 为了补偿第一非线性电容，第二非线性电容耦合到开关，其具有响应于在与第一非线性电容的变化方向相反的变化方向上移动的电压变化的电容值。

公开(公告)号：US20060033546A1

公开(公告)日：2006-02-16

申请号：US11239943

申请日：2005-09-30

申请人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

发明人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

IPC分类号： G06F1/04

CPC分类号： G06F7/68 ,  H03L7/183 ,  H03L7/23

摘要： A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal frequency is preferably chosen at a value in which potential interference signals do not have much energy. The first loop preferably has low bandwidth to provide good input jitter attenuation, while second loop preferably has higher bandwidth to reduce phase noise of the output signal. The circuit preferably provides for a choice of several different intermediate frequencies to allow use where different intermediate frequencies may exist in each system. Moreover, in a system having two such dual-loop PLL circuits, each can be configured with a different intermediate frequency, so that interference from one to the other is reduced.

摘要翻译： PLL功能可以实现为具有从参考信号产生中间信号的第一PLL电路的双回路结构，以及从中间信号产生输出信号的第二PLL电路。 中间信号频率优选地被选择为其中潜在的干扰信号没有太多能量的值。 第一环路优选具有低带宽以提供良好的输入抖动衰减，而第二环路优选地具有较高带宽以减少输出信号的相位噪声。 该电路优选地提供几种不同中频的选择，以允许在每个系统中可能存在不同中频的应用。 此外，在具有两个这样的双回路PLL电路的系统中，每个都可以配置有不同的中频，从而减少了从一个到另一个的干扰。

公开(公告)号：US20050285687A1

公开(公告)日：2005-12-29

申请号：US11004022

申请日：2004-12-03

申请人： Ligang Zhang ,  Yunteng Huang

发明人： Ligang Zhang ,  Yunteng Huang

IPC分类号： H03B5/04 ,  H03L7/00 ,  H03L7/099

CPC分类号： H03B5/04 ,  H03L7/099

摘要： A variable capacitance circuit includes a first and a second capacitor. A switch having an associated first nonlinear capacitance, selectively couples the first and second capacitors. To compensate for the first nonlinear capacitance, a second nonlinear capacitance is coupled to the switch that has a capacitance value responsive to a change in voltage that moves in a direction of change opposite to a direction of change of the first nonlinear capacitance.

摘要翻译： 可变电容电路包括第一和第二电容器。 具有相关联的第一非线性电容的开关选择性地耦合第一和第二电容器。 为了补偿第一非线性电容，第二非线性电容耦合到开关，其具有响应于在与第一非线性电容的变化方向相反的变化方向上移动的电压变化的电容值。

公开(公告)号：US06970030B1

公开(公告)日：2005-11-29

申请号：US10676626

申请日：2003-10-01

申请人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

发明人： Yunteng Huang ,  Ligang Zhang ,  Axel Thomsen

IPC分类号： G06F1/04 ,  G06F7/68 ,  H03L7/183 ,  H03L7/23

CPC分类号： G06F7/68 ,  H03L7/183 ,  H03L7/23

摘要： A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal frequency is preferably chosen at a value in which potential interference signals do not have much energy. The first loop preferably has low bandwidth to provide good input jitter attenuation, while second loop preferably has higher bandwidth to reduce phase noise of the output signal. The circuit preferably provides for a choice of several different intermediate frequencies to allow use where different intermediate frequencies may exist in each system. Moreover, in a system having two such dual-loop PLL circuits, each can be configured with a different intermediate frequency, so that interference from one to the other is reduced.

摘要翻译： PLL功能可以实现为具有从参考信号产生中间信号的第一PLL电路的双回路结构，以及从中间信号产生输出信号的第二PLL电路。 中间信号频率优选地被选择为其中潜在的干扰信号没有太多能量的值。 第一环路优选具有低带宽以提供良好的输入抖动衰减，而第二环路优选地具有较高带宽以减少输出信号的相位噪声。 该电路优选地提供几种不同中频的选择，以允许在每个系统中可能存在不同中频的应用。 此外，在具有两个这样的双回路PLL电路的系统中，每个都可以配置有不同的中频，从而减少了从一个到另一个的干扰。

公开(公告)号：US20090247101A1

公开(公告)日：2009-10-01

申请号：US12286315

申请日：2008-09-30

申请人： Ligang Zhang ,  Steve W. Hanawalt ,  Greg Hodgson ,  Liang Wu

发明人： Ligang Zhang ,  Steve W. Hanawalt ,  Greg Hodgson ,  Liang Wu

IPC分类号： H04B1/18

CPC分类号： H03J1/0091

摘要： Methods and systems are disclosed for automatic detection of channel spacing for broadcast bands in different regions that use different channel spacing. Using the described embodiments, channel spacing at a users' current location can be automatically detected so that manual settings by the user are not necessary, especially when a user travels with his/her radio across regions that use different channel spacing for radio broadcasting bands. This auto-detected channel spacing can then be used for later channel searching by the radio. More particularly, methods and systems are disclosed for auto-detection of channel spacing for AM broadcasts using different channel spacings, such as the standard 9 kHz and 10 kHz spacings, used today in different geographic regions of the world for AM broadcast bands.

摘要翻译： 公开了用于自动检测使用不同信道间隔的不同区域中的广播频带的信道间隔的方法和系统。 使用所描述的实施例，可以自动检测用户当前位置处的信道间隔，使得不需要用户的手动设置，特别是当用户使用他/她的无线电横跨用于无线电广播频带的不同信道间隔的区域行进时。 然后，该自动检测的信道间隔可用于随后的无线电信道搜索。 更具体地，公开了用于使用当今在AM广播频带的世界不同地理区域中使用的不同信道间隔（例如标准9kHz和10kHz间隔）的AM广播的信道间隔的自动检测的方法和系统。

公开(公告)号：US07375411B2

公开(公告)日：2008-05-20

申请号：US10860081

申请日：2004-06-03

申请人： Ligang Zhang

发明人： Ligang Zhang

IPC分类号： H01L3/52

CPC分类号： H01L23/5227 ,  H01L23/5223 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H01L2924/00

摘要： A region of high metal density may be placed in metal layers proximate to an area of low metal density below an inductor on an integrated circuit without violating manufacturing design rules for reducing manufacturing defects and without substantially impacting performance of the inductor. These results are achieved by including a transitional region that includes conductive structures electrically isolated from each other between the region of high metal density and the region of low metal density. The transitional region has a structure that allows a negligible amount of current flow to be induced in the structure.

摘要翻译： 金属密度高的区域可以放置在集成电路上靠近电感器以下的低金属密度区域的金属层中，而不会违反制造设计规则，以减少制造缺陷并且基本上不影响电感器的性能。 这些结果通过包括在高金属密度区域和低金属密度区域之间包括彼此电隔离的导电结构的过渡区域来实现。 过渡区域具有允许在该结构中引起可忽略的电流量的结构。

公开(公告)号：US20050269668A1

公开(公告)日：2005-12-08

申请号：US10860081

申请日：2004-06-03

申请人： Ligang Zhang

发明人： Ligang Zhang

IPC分类号： H01L21/8222 ,  H01L23/522 ,  H01L27/08

CPC分类号： H01L23/5227 ,  H01L23/5223 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H01L2924/00

摘要： A region of high metal density may be placed in metal layers proximate to an area of low metal density below an inductor on an integrated circuit without violating manufacturing design rules for reducing manufacturing defects and without substantially impacting performance of the inductor. These results are achieved by including a transitional region that includes conductive structures electrically isolated from each other between the region of high metal density and the region of low metal density. The transitional region has a structure that allows a negligible amount of current flow to be induced in the structure.

摘要翻译： 金属密度高的区域可以放置在集成电路上靠近电感器以下的低金属密度区域的金属层中，而不会违反制造设计规则，以减少制造缺陷并且基本上不影响电感器的性能。 这些结果通过包括在高金属密度区域和低金属密度区域之间包括彼此电隔离的导电结构的过渡区域来实现。 过渡区域具有允许在该结构中引起可忽略的电流量的结构。