公开(公告)号：US20130138417A1

公开(公告)日：2013-05-30

申请号：US13305178

申请日：2011-11-28

申请人： Jian LIU ,  Xiao Lin ,  Anyu Kuo ,  Jiayuan Fang

发明人： Jian LIU ,  Xiao Lin ,  Anyu Kuo ,  Jiayuan Fang

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： Methods, systems, and computer readable media are disclosed for simulating a circuit. The method may comprise a step of providing a network model of the circuit having a plurality of ports, the plurality of ports being associated with one or more net pairs. The method may also comprise combining the plurality of ports into one or more groups based on the net pairs, each group corresponding to a net pair. In addition, the method may comprise calculating, for each group, one or more expansion elements, wherein the one or more expansion elements are associated with a shared property among all ports of the group. Moreover, the method may comprise simulating the circuit using a combination of the expansion elements calculated for each group.

摘要翻译： 公开了用于模拟电路的方法，系统和计算机可读介质。 该方法可以包括提供具有多个端口的电路的网络模型的步骤，该多个端口与一个或多个网络对相关联。 所述方法还可以包括基于所述网络对将所述多个端口组合成一个或多个组，每个组对应于网络对。 此外，该方法可以包括为每个组计算一个或多个扩展元素，其中一个或多个扩展元素与该组的所有端口中的共享属性相关联。 此外，该方法可以包括使用为每个组计算的扩展元件的组合来模拟电路。

公开(公告)号：US09542515B2

公开(公告)日：2017-01-10

申请号：US13305178

申请日：2011-11-28

申请人： Jian Liu ,  Xiao Lin ,  Anyu Kuo ,  Jiayuan Fang

发明人： Jian Liu ,  Xiao Lin ,  Anyu Kuo ,  Jiayuan Fang

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： Methods, systems, and computer readable media are disclosed for simulating a circuit. The method may comprise a step of providing a network model of the circuit having a plurality of ports, the plurality of ports being associated with one or more net pairs. The method may also comprise combining the plurality of ports into one or more groups based on the net pairs, each group corresponding to a net pair. In addition, the method may comprise calculating, for each group, one or more expansion elements, wherein the one or more expansion elements are associated with a shared property among all ports of the group. Moreover, the method may comprise simulating the circuit using a combination of the expansion elements calculated for each group.

摘要翻译： 公开了用于模拟电路的方法，系统和计算机可读介质。 该方法可以包括提供具有多个端口的电路的网络模型的步骤，该多个端口与一个或多个网络对相关联。 所述方法还可以包括基于所述网络对将所述多个端口组合成一个或多个组，每个组对应于网络对。 此外，该方法可以包括为每个组计算一个或多个扩展元素，其中一个或多个扩展元素与该组的所有端口中的共享属性相关联。 此外，该方法可以包括使用为每个组计算的扩展元件的组合来模拟电路。

公开(公告)号：US08682625B2

公开(公告)日：2014-03-25

申请号：US13294325

申请日：2011-11-11

申请人： Jian Liu ,  Kaiyu Mao ,  Jiayuan Fang

发明人： Jian Liu ,  Kaiyu Mao ,  Jiayuan Fang

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： Method, system, and computer readable medium are disclosed for analyzing electrical properties of a circuit. The method may comprise: providing a network model including at least one network parameter, the network parameter being defined over a frequency range; converting the network parameter into an intermediate network parameter having first and second portions; identifying first and second frequencies defining a frequency sub-range; replacing the first portion of the intermediate network parameter with a DC value when a frequency associated with the intermediate network parameter is lower than the first frequency; replacing the first portion of the intermediate network parameter with a transitional value when the frequency associated with the intermediate network parameter is within the frequency sub-range; and converting the intermediate network parameter with the replaced first portion into an updated network parameter.

摘要翻译： 公开了用于分析电路的电性能的方法，系统和计算机可读介质。 该方法可以包括：提供包括至少一个网络参数的网络模型，所述网络参数在频率范围内被定义; 将所述网络参数转换成具有第一和第二部分的中间网络参数; 识别限定频率子范围的第一和第二频率; 当与中间网络参数相关联的频率低于第一频率时，用DC值替换中间网络参数的第一部分; 当与中间网络参数相关联的频率在频率子范围内时，用中间网络参数的第一部分替换中间网络参数; 以及将具有所替换的第一部分的中间网络参数转换为更新的网络参数。

公开(公告)号：US08874422B2

公开(公告)日：2014-10-28

申请号：US13170494

申请日：2011-06-28

申请人： Jian Liu ,  Jiayuan Fang

发明人： Jian Liu ,  Jiayuan Fang

IPC分类号： G06F17/50

CPC分类号： G06F17/5036 ,  G06F2217/40

摘要： Methods, systems, and computer-readable media for simulating an electronic packaging structure are disclosed. The methods include providing an electromagnetic simulation framework for simulating the electronic packaging structure that includes at least two planes and an interconnect transitional component. The framework includes solvers for simulation based on parallel-plate, strip line, and microstrip line modes. The method also includes defining ports of the component based on modes, computing a network function characterizing the properties of the component; and associating ports with solvers of the framework.

摘要翻译： 公开了用于模拟电子封装结构的方法，系统和计算机可读介质。 所述方法包括提供用于模拟包括至少两个平面和互连过渡部件的电子封装结构的电磁仿真框架。 该框架包括基于平行板，带状线和微带线模式的模拟求解器。 该方法还包括基于模式定义组件的端口，计算表征组件的属性的网络功能; 并将端口与框架的求解器相关联。

公开(公告)号：US08694568B2

公开(公告)日：2014-04-08

申请号：US13091666

申请日：2011-04-21

申请人： Kezhou Li ,  Jing Wang ,  Jiayuan Fang

发明人： Kezhou Li ,  Jing Wang ,  Jiayuan Fang

IPC分类号： G06F17/10

CPC分类号： H04L25/0212 ,  H04L25/025 ,  H04L25/0252

摘要： A computer-implemented method for calculating a time-domain impulse response with improved causality based on a first spectrum in a frequency domain is disclosed. The first spectrum may be band-limited. The method may calculate a first time-domain impulse response from the first spectrum. The method may remove a non-causal portion of the first system time-domain impulse response to obtain a second time-domain impulse response, and calculate a second spectrum of the second time-domain impulse response. The method may further modify the second spectrum by adding a causal signal such that a difference between the second spectrum and the first spectrum is reduced. The method may also calculate the time-domain impulse response with improved causality from the modified second spectrum.

摘要翻译： 公开了一种用于基于频域中的第一频谱来改善因果关系来计算时域脉冲响应的计算机实现的方法。 第一个频谱可能是频带限制的。 该方法可以计算来自第一光谱的第一时域脉冲响应。 该方法可以去除第一系统时域脉冲响应的非因果部分以获得第二时域脉冲响应，并且计算第二时域脉冲响应的第二频谱。 该方法可以通过增加因果信号来进一步修改第二频谱，使得第二频谱和第一频谱之间的差减小。 该方法还可以从经修改的第二频谱改进的因果关系来计算时域脉冲响应。

公开(公告)号：US09910945B2

公开(公告)日：2018-03-06

申请号：US13306082

申请日：2011-11-29

申请人： Jiayuan Fang ,  Guoxin Fan

发明人： Jiayuan Fang ,  Guoxin Fan

IPC分类号： G06F17/10 ,  G06F17/50

CPC分类号： G06F17/5036

摘要： Methods, systems, and computer-readable media for reference impedance adaptation are disclosed. The method may comprise a step of providing a network model of a circuit having at least one port, wherein the network model includes at least one network parameter, the network parameter being associated with the port and being defined based on a reference impedance of the port. The method may further comprise computing an input impedance of the port based on the network parameter. The method may also include defining a new reference impedance for the port based on the input impedance. Moreover, the method may include calculating a new network parameter of the network model based on the new reference impedance.

公开(公告)号：US20130138402A1

公开(公告)日：2013-05-30

申请号：US13306082

申请日：2011-11-29

申请人： Jiayuan Fang ,  Guoxin Fan

发明人： Jiayuan Fang ,  Guoxin Fan

IPC分类号： G06F17/50 ,  G06F17/10

CPC分类号： G06F17/5036

摘要： Methods, systems, and computer-readable media for reference impedance adaptation are disclosed. The method may comprise a step of providing a network model of a circuit having at least one port, wherein the network model includes at least one network parameter, the network parameter being associated with the port and being defined based on a reference impedance of the port. The method may further comprise computing an input impedance of the port based on the network parameter. The method may also include defining a new reference impedance for the port based on the input impedance. Moreover, the method may include calculating a new network parameter of the network model based on the new reference impedance.

摘要翻译： 公开了用于参考阻抗适配的方法，系统和计算机可读介质。 该方法可以包括提供具有至少一个端口的电路的网络模型的步骤，其中所述网络模型包括至少一个网络参数，所述网络参数与所述端口相关联并且基于所述端口的参考阻抗来定义 。 该方法还可以包括基于网络参数来计算端口的输入阻抗。 该方法还可以包括基于输入阻抗为端口定义新的参考阻抗。 此外，该方法可以包括基于新的参考阻抗计算网络模型的新网络参数。

公开(公告)号：US6084779A

公开(公告)日：2000-07-04

申请号：US165382

申请日：1998-10-02

申请人： Jiayuan Fang

发明人： Jiayuan Fang

IPC分类号： H05K1/02 ,  H05K1/18

CPC分类号： H05K1/0216 ,  H05K1/0231 ,  H05K2201/10689

摘要： The present invention is a multi-level printed circuit board (PCB) containing at least one power plane for conducting and distributing electrical power and at least one ground plane, spaced apart from the power plane, for providing and distributing an electrical ground. At least one integrated circuit chip is mounted on the printed circuit board. At least one signal plane is spaced apart from both the power plane and the ground plane, for conducting and distributing electrical signals from a first point to a second point. The signal plane(s) each have a portion or "patch" that is electrically isolated from signal traces in the remainder of the signal plane. The patches are placed in the area underneath the integrated circuit chip. The patches are connected, respectively, to the power plane or to the ground plane, for reducing effective inductance and input impedance. The multi-level PCB has one or more plated through hole vias for connecting the power or ground plane to a patch. Decoupling capacitors may be provided between the sets of plated through hole vias to further reduce input impedance.

摘要翻译： 本发明是一种多级印刷电路板（PCB），其包含用于导电和分配电力的至少一个电源平面和与电源平面间隔开的至少一个接地平面，用于提供和分配电气接地。 至少一个集成电路芯片安装在印刷电路板上。 至少一个信号平面与功率平面和接地平面分开，用于将电信号从第一点传导到第二点。 信号平面各自具有与信号平面的其余部分中的信号迹线电隔离的部分或“贴片”。 贴片放置在集成电路芯片下方的区域。 这些贴片分别连接到电源平面或接地平面，以降低有效电感和输入阻抗。 多层PCB具有用于将电源或接地平面连接到贴片的一个或多个电镀通孔通孔。 可以在电镀通孔通孔组之间提供去耦电容器，以进一步减小输入阻抗。

公开(公告)号：US5566083A

公开(公告)日：1996-10-15

申请号：US325006

申请日：1994-10-18

申请人： Jiayuan Fang

发明人： Jiayuan Fang

IPC分类号： G01R31/28 ,  G01R31/30 ,  G06F17/50

CPC分类号： G01R31/2805 ,  G01R31/30 ,  G06F17/5036

摘要： The present invention features a method for analyzing voltage fluctuations in multilayered electronic packaging structures. A physical electronic packaging structure having at least two, spaced-apart, metallic planes and a via are first provided. This package has an inherent input impedance associated with the via and is essentially dependent upon the radius of the via. A numerical model of a portion of the physical electronic packaging structure containing the via is made. An effective input impedance of the numerical model is then obtained. A unique impedance transforming operation is used to cause the effective input impedance of the numerical model to essentially match the input impedance of the physical structure, thus allowing an accurate simulation of the physical structure.

摘要翻译： 本发明的特征在于分析多层电子封装结构中的电压波动的方法。 首先提供具有至少两个间隔开的金属平面和通孔的物理电子封装结构。 该封装具有与通孔相关联的固有输入阻抗，并且基本上取决于通孔的半径。 制造包含通孔的物理电子封装结构的一部分的数值模型。 然后获得数值模型的有效输入阻抗。 使用独特的阻抗变换操作来使数值模型的有效输入阻抗基本上匹配物理结构的输入阻抗，从而允许物理结构的精确仿真。

公开(公告)号：US20120269230A1

公开(公告)日：2012-10-25

申请号：US13091666

申请日：2011-04-21

申请人： Kezhou LI ,  Jing Wang ,  Jiayuan Fang

发明人： Kezhou LI ,  Jing Wang ,  Jiayuan Fang

IPC分类号： H04B1/7163

CPC分类号： H04L25/0212 ,  H04L25/025 ,  H04L25/0252

摘要： A computer-implemented method for calculating a time-domain impulse response with improved causality based on a first spectrum in a frequency domain is disclosed. The first spectrum may be band-limited. The method may calculate a first time-domain impulse response from the first spectrum. The method may remove a non-causal portion of the first system time-domain impulse response to obtain a second time-domain impulse response, and calculate a second spectrum of the second time-domain impulse response. The method may further modify the second spectrum by adding a causal signal such that a difference between the second spectrum and the first spectrum is reduced. The method may also calculate the time-domain impulse response with improved causality from the modified second spectrum.

摘要翻译： 公开了一种用于基于频域中的第一频谱来改善因果关系来计算时域脉冲响应的计算机实现的方法。 第一个频谱可能是频带限制的。 该方法可以计算来自第一光谱的第一时域脉冲响应。 该方法可以去除第一系统时域脉冲响应的非因果部分以获得第二时域脉冲响应，并且计算第二时域脉冲响应的第二频谱。 该方法可以通过增加因果信号来进一步修改第二频谱，使得第二频谱和第一频谱之间的差减小。 该方法还可以从经修改的第二频谱改进的因果关系来计算时域脉冲响应。