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31. 发明授权

US08793636B2 Placement of structured nets 有权
标题翻译：结构化网络的布置
公开(公告)号：US08793636B2
公开(公告)日：2014-07-29
申请号：US13086428
申请日：2011-04-14
申请人： Charles J. Alpert , Myung-Chul Kim , Zhuo Li , Natarajan Viswanathan , Samuel I. Ward
发明人： Charles J. Alpert , Myung-Chul Kim , Zhuo Li , Natarajan Viswanathan , Samuel I. Ward
IPC分类号： G06F17/50
CPC分类号： G06F17/5072
摘要： Mechanisms are provided for performing placement of cells in a design of a semiconductor device. An initial design of the semiconductor device is generated, the initial design comprising a first placement of cells. A preferred direction of placement associated with the cells is determined. The preferred direction is a direction along which spreading of the cells is preferred. A second design of the semiconductor device is generated by modifying the first placement of the cells to generate a second placement of cells, different from the first placement cells, based on the preferred direction of placement associated with the cells.
摘要翻译：提供了用于在半导体器件的设计中执行电池放置的机构。生成半导体器件的初始设计，初始设计包括单元的第一放置。确定与细胞相关联的放置的优选方向。优选的方向是细胞扩散优选的方向。基于与单元相关联的放置的优选方向，通过修改单元的第一放置以产生与第一放置单元不同的单元的第二放置来生成半导体器件的第二设计。

32. 发明授权

US08493356B2 Noise cancellation technique for capacitive touchscreen controller using differential sensing 有权
标题翻译：使用差分感测的电容式触摸屏控制器的噪声消除技术
公开(公告)号：US08493356B2
公开(公告)日：2013-07-23
申请号：US12986881
申请日：2011-01-07
申请人： Ashutosh Ravindra Joharapurkar , Jean CauXuan Le , Natarajan Viswanathan , Patrick Chan
发明人： Ashutosh Ravindra Joharapurkar , Jean CauXuan Le , Natarajan Viswanathan , Patrick Chan
IPC分类号： G06F3/045
CPC分类号： G06F3/0418 , G06F3/0416 , G06F3/044 , H03K17/96 , H03K2217/96062
摘要： A differential sensing scheme provides a means for detecting one or more touch events on a touch sensitive device in the presence of incident noise. Instead of sensing one touch sensitive channel, such as a row, column, or single touch sensor, multiple touch sensitive channels are sampled at a time. By sampling two nearby channels simultaneously and doing the measurement differentially, noise common to both channels is cancelled. The differential sensing scheme is implemented using simple switch-capacitor AFE circuitry. The originally sensed data on each individual channel is recovered free of common-mode noise. The recovered sensed data is used to determine the presence of one or more touch events and if present the location of each touch event on the touch sensitive device.
摘要翻译：差分感测方案提供了用于在存在入射噪声的情况下检测触敏装置上的一个或多个触摸事件的装置。代替检测一个触敏通道（例如行，列或单触摸传感器），一次对多个触摸敏感通道进行采样。通过同时采样两个附近的通道并进行差分测量，两个通道共同的噪声被取消。差分感测方案采用简单的开关电容AFE电路实现。每个独立通道上的原始感测数据被恢复而不存在共模噪声。恢复的感测数据用于确定一个或多个触摸事件的存在，并且如果存在触摸敏感设备上的每个触摸事件的位置。

33. 发明申请

US20110261008A1 USE OF RANDOM SAMPLING TECHNIQUE TO REDUCE FINGER-COUPLED NOISE 有权
标题翻译：使用随机采样技术来减少手指耦合噪声
公开(公告)号：US20110261008A1
公开(公告)日：2011-10-27
申请号：US12987008
申请日：2011-01-07
申请人： Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
发明人： Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
IPC分类号： G06F3/045
CPC分类号： G06F3/0418 , G06F3/0412 , G06F3/044 , H03K17/96 , H03K17/962 , H03K2217/96062
摘要： Random sampling techniques include techniques for reducing or eliminating errors in the output of capacitive sensor arrays such as touch panels. The channels of the touch panel are periodically sampled to determine the presence of one or more touch events. Each channel is individually sampled in a round robin fashion, referred to as a sampling cycle. During each sampling cycle, all channels are sampled once. Multiple sampling cycles are performed such that each channel is sampled multiple times. Random sampling techniques are used to sample each of the channels. One random sampling technique randomizes a starting channel in each sampling cycle. Another random sampling technique randomizes the selection of all channels in each sampling cycle. Yet another random sampling technique randomizes the sampling cycle delay period between each sampling cycle. Still another random sampling technique randomizes the channel delay period between sampling each channel.
摘要翻译：随机采样技术包括用于减少或消除诸如触摸面板的电容式传感器阵列的输出中的误差的技术。周期性地对触摸面板的通道进行采样，以确定是否存在一个或多个触摸事件。每个通道以循环方式单独采样，称为采样周期。在每个采样周期期间，所有通道都被采样一次。执行多个采样周期，使得每个通道被多次采样。随机采样技术用于对每个通道进行采样。一个随机采样技术将每个采样周期中的起始通道随机化。另一种随机采样技术随机化了每个采样周期中所有信道的选择。另一种随机抽样技术使每个采样周期之间的采样周期延迟周期随机化。另一种随机采样技术使每个通道采样之间的通道延迟周期随机化。

34. 发明授权

US07266796B1 Fastplace method for integrated circuit design 失效
标题翻译：集成电路设计的Fastplace方法
公开(公告)号：US07266796B1
公开(公告)日：2007-09-04
申请号：US11102381
申请日：2005-04-08
申请人： Chris Chong-Nuen Chu , Natarajan Viswanathan
发明人： Chris Chong-Nuen Chu , Natarajan Viswanathan
IPC分类号： G06F17/50
CPC分类号： G06F17/5072
摘要： A method for efficient analytical placement of standard cell designs includes obtaining a placement of cells using a wirelength objective function, modifying the placement of cells by cell shifting to redistribute cells to thereby reduce cell overlap, and refining the placement of cells to thereby reduce wirelength using a half-perimeter bounding rectangle-measure. Preferably the wirelength the wirelength objective function is a quadratic objective function which is solved using a hybrid net model. The hybrid net model preferably uses a clique model for two-pin and three-pin nets and a star model for nets having at least four pins. The use of the hybrid net model reduces a number of non-zero entries in a connectivity matrix.
摘要翻译：用于标准细胞设计的有效分析放置的方法包括使用线长目标函数获得细胞的放置，通过细胞移动修改细胞的位置以重新分布细胞，从而减少细胞重叠，以及细化细胞的放置，从而减少使用半边界边界矩形测量。优选地，线长度目标函数是使用混合网络模型求解的二次目标函数。混合网络模型优选地使用用于双引脚和三引脚网络的集群模型和具有至少四个引脚的网络的星型模型。混合网络模型的使用减少了连接矩阵中的非零条目数量。

35. 发明申请

US20130205272A1 ALIGNMENT NET INSERTION FOR STRAIGHTENING THE DATAPATH IN A FORCE-DIRECTED PLACER 有权
标题翻译：用于在强制指定的标签中对齐数据的对准网络插入
公开(公告)号：US20130205272A1
公开(公告)日：2013-08-08
申请号：US13826631
申请日：2013-03-14
申请人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
发明人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
IPC分类号： G06F17/50
CPC分类号： G06F17/5072 , G06F17/50
摘要： An automated method for aligning a critical datapath in an integrated circuit design inserts an artificial alignment net in the netlist which interconnects all cells in the bit stack of the datapath. The cells are placed using a wirelength optimization which assigns weights to wire sections based on the alignment direction. The rate of change of the alignment weighting value can vary during different stages of global placement. The invention is particularly suited for a force-directed placer which uses a linear system solver to obtain a globally optimum solution for placement of the cells having some overlap among the cells, and thereafter spreads the cells to reduce the overlap. Pseudo nets are also inserted which interconnect a cell and an expected location of the cell after spreading for that iteration.
摘要翻译：用于在集成电路设计中对准关键数据路径的自动化方法在网表中插入人造对准网络，其将数据通路的位堆栈中的所有单元互连。使用线长优化来放置单元，其根据对准方向为线段分配权重。校准加权值的变化率可以在全球放置的不同阶段变化。本发明特别适用于使用线性系统求解器获得全局最佳解决方案的力导向放置器，用于放置在单元之间具有一些重叠的单元，然后扩展单元以减少重叠。还插入伪网络，其在传播之后将小区和小区的预期位置相互连接。

36. 发明申请

US20130097573A1 ALIGNMENT NET INSERTION FOR STRAIGHTENING THE DATAPATH IN A FORCE-DIRECTED PLACER 失效
公开(公告)号：US20130097573A1
公开(公告)日：2013-04-18
申请号：US13275105
申请日：2011-10-17
申请人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
发明人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
IPC分类号： G06F17/50
CPC分类号： G06F17/5072 , G06F17/50
摘要： An automated method for aligning a critical datapath in an integrated circuit design inserts an artificial alignment net in the netlist which interconnects all cells in the bit stack of the datapath. The cells are placed using a wirelength optimization which assigns weights to wire sections based on the alignment direction. The rate of change of the alignment weighting value can vary during different stages of global placement. The invention is particularly suited for a force-directed placer which uses a linear system solver to obtain a globally optimum solution for placement of the cells having some overlap among the cells, and thereafter spreads the cells to reduce the overlap. Pseudo nets are also inserted which interconnect a cell and an expected location of the cell after spreading for that iteration.

37. 发明授权

US09391607B2 Use of random sampling technique to reduce finger-coupled noise 有权
标题翻译：使用随机采样技术来减少手指耦合噪声
公开(公告)号：US09391607B2
公开(公告)日：2016-07-12
申请号：US12987008
申请日：2011-01-07
申请人： Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
发明人： Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
IPC分类号： G06F3/044 , H03K17/96 , G06F3/041
CPC分类号： G06F3/0418 , G06F3/0412 , G06F3/044 , H03K17/96 , H03K17/962 , H03K2217/96062
摘要： Random sampling techniques include techniques for reducing or eliminating errors in the output of capacitive sensor arrays such as touch panels. The channels of the touch panel are periodically sampled to determine the presence of one or more touch events. Each channel is individually sampled in a round robin fashion, referred to as a sampling cycle. During each sampling cycle, all channels are sampled once. Multiple sampling cycles are performed such that each channel is sampled multiple times. Random sampling techniques are used to sample each of the channels. One random sampling technique randomizes a starting channel in each sampling cycle. Another random sampling technique randomizes the selection of all channels in each sampling cycle. Yet another random sampling technique randomizes the sampling cycle delay period between each sampling cycle. Still another random sampling technique randomizes the channel delay period between sampling each channel.
摘要翻译：随机采样技术包括用于减少或消除诸如触摸面板的电容式传感器阵列的输出中的误差的技术。周期性地对触摸面板的通道进行采样，以确定是否存在一个或多个触摸事件。每个通道以循环方式单独采样，称为采样周期。在每个采样周期期间，所有通道都被采样一次。执行多个采样周期，使得每个通道被多次采样。随机采样技术用于对每个通道进行采样。一个随机采样技术将每个采样周期中的起始通道随机化。另一种随机采样技术随机化了每个采样周期中所有信道的选择。另一种随机抽样技术使每个采样周期之间的采样周期延迟周期随机化。另一种随机采样技术使每个通道采样之间的通道延迟周期随机化。

38. 发明授权

US08453093B2 Alignment net insertion for straightening the datapath in a force-directed placer 失效
标题翻译：对准网插入，用于矫正力导向放置器中的数据通路
公开(公告)号：US08453093B2
公开(公告)日：2013-05-28
申请号：US13275105
申请日：2011-10-17
申请人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
发明人： Myung-Chul Kim , Natarajan Viswanathan , Samuel I. Ward
IPC分类号： G06F17/50 , G06F11/22
CPC分类号： G06F17/5072 , G06F17/50
摘要： An automated method for aligning a critical datapath in an integrated circuit design inserts an artificial alignment net in the netlist which interconnects all cells in the bit stack of the datapath. The cells are placed using a wirelength optimization which assigns weights to wire sections based on the alignment direction. The rate of change of the alignment weighting value can vary during different stages of global placement. The invention is particularly suited for a force-directed placer which uses a linear system solver to obtain a globally optimum solution for placement of the cells having some overlap among the cells, and thereafter spreads the cells to reduce the overlap. Pseudo nets are also inserted which interconnect a cell and an expected location of the cell after spreading for that iteration.
摘要翻译：用于在集成电路设计中对准关键数据路径的自动化方法在网表中插入人造对准网络，其将数据通路的位堆栈中的所有单元互连。使用线长优化来放置单元，其根据对准方向为线段分配权重。校准加权值的变化率可以在全球放置的不同阶段变化。本发明特别适用于使用线性系统求解器获得全局最佳解决方案的力导向放置器，用于放置在单元之间具有一些重叠的单元，然后扩展单元以减少重叠。还插入伪网络，其在传播之后将小区和小区的预期位置相互连接。

39. 发明申请

US20110261007A1 NOISE CANCELLATION TECHNIQUE FOR CAPACITIVE TOUCHSCREEN CONTROLLER USING DIFFERENTIAL SENSING 有权
标题翻译：使用差分感测的电容式触控控制器的噪声消除技术
公开(公告)号：US20110261007A1
公开(公告)日：2011-10-27
申请号：US12986881
申请日：2011-01-07
申请人： Ashutosh Ravindra Joharapurkar , Jean CauXuan Le , Natarajan Viswanathan , Patrick Chan
发明人： Ashutosh Ravindra Joharapurkar , Jean CauXuan Le , Natarajan Viswanathan , Patrick Chan
IPC分类号： G06F3/045
CPC分类号： G06F3/0418 , G06F3/0416 , G06F3/044 , H03K17/96 , H03K2217/96062
摘要： A differential sensing scheme provides a means for detecting one or more touch events on a touch sensitive device in the presence of incident noise. Instead of sensing one touch sensitive channel, such as a row, column, or single touch sensor, multiple touch sensitive channels are sampled at a time. By sampling two nearby channels simultaneously and doing the measurement differentially, noise common to both channels is cancelled. The differential sensing scheme is implemented using simple switch-capacitor AFE circuitry. The originally sensed data on each individual channel is recovered free of common-mode noise. The recovered sensed data is used to determine the presence of one or more touch events and if present the location of each touch event on the touch sensitive device.
摘要翻译：差分感测方案提供了用于在存在入射噪声的情况下检测触敏装置上的一个或多个触摸事件的装置。代替检测一个触敏通道（例如行，列或单触摸传感器），一次对多个触摸敏感通道进行采样。通过同时采样两个附近的通道并进行差分测量，两个通道共同的噪声被取消。差分感测方案采用简单的开关电容AFE电路实现。每个独立通道上的原始感测数据被恢复，没有共模噪声。恢复的感测数据用于确定一个或多个触摸事件的存在，并且如果存在触摸敏感设备上的每个触摸事件的位置。

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