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1. 发明授权

US07441213B2 Method for testing the validity of initial-condition statements in circuit simulation, and correcting inconsistencies thereof 有权
标题翻译：用于测试电路仿真中初始条件语句的有效性的方法，以及校正其不一致性
公开(公告)号：US07441213B2
公开(公告)日：2008-10-21
申请号：US11307894
申请日：2006-02-27
申请人： Timothy S. Lehner , Richard D. Kimmel , Ali Sadigh , Emrah Acar , Ying Liu , Ivan L. Wemple
发明人： Timothy S. Lehner , Richard D. Kimmel , Ali Sadigh , Emrah Acar , Ying Liu , Ivan L. Wemple
IPC分类号： G06F17/50
CPC分类号： G06F17/5036
摘要： A method and a system for validating initial conditions (ICs) generally provided by a user when simulating a VLSI circuit are described. Inconsistent ICs sets are detected and replaced by consistent subsets thereof. The method selects the resistance and source values in a Norton or Thevenin circuit used to enforce the IC, and detects when specified ICs are inconsistent while preserving critical or fragile ICs when a two DC-pass approach is used. It further correlates the set of consistent ICs thus obtained with an equivalent circuit and simultaneously provides an input for future use. This allows a user to be notified and given a measure of how bad the inconsistencies are. Detecting inconsistencies is achieved either by measuring the holding current or by measuring the voltage drift if the two DC-pass approach is used.
摘要翻译：描述用于在模拟VLSI电路时通常由用户提供的用于验证初始条件（IC）的方法和系统。检测不一致的IC集合，并由其一致的子集替换。该方法选择用于强制IC的Norton或Thevenin电路中的电阻和源值，并在使用两个DC-pass方法时检测指定的IC是否不一致，同时保留关键或易碎IC。它进一步将由此获得的一组一致的IC与等效电路相关联，并同时提供用于将来使用的输入。这允许用户被通知，并给出了不一致的程度。通过测量保持电流或通过使用两个直流通路的方法测量电压漂移来实现检测不一致。

2. 发明授权

US08825455B2 On-demand table model for semiconductor device evaluation 有权
标题翻译：半导体器件评估的按需表模型
公开(公告)号：US08825455B2
公开(公告)日：2014-09-02
申请号：US13289589
申请日：2011-11-04
申请人： Calvin J. Bittner , Peter Feldmann , Richard D. Kimmel , Tong Li , Ali Sadigh , David W. Winston
发明人： Calvin J. Bittner , Peter Feldmann , Richard D. Kimmel , Tong Li , Ali Sadigh , David W. Winston
IPC分类号： G06F17/10 , G06F17/17
CPC分类号： G06F17/175
摘要： An on-demand table model for semiconductor device evaluation is provided. A method of providing on-demand table models for semiconductor device evaluation, includes measuring one or more measurement values of an instance of a semiconductor device. The method further includes providing, by a processor, a table model of the instance for the semiconductor device evaluation upon receiving a request for the semiconductor device evaluation. The method further includes generating a table entry in the table model for the one or more measurement values, the table entry including one or more evaluation values of an evaluation function for the instance.
摘要翻译：提供了半导体器件评估的按需表模型。一种提供用于半导体器件评估的按需表模型的方法，包括测量半导体器件的实例的一个或多个测量值。所述方法还包括在接收到半导体器件评估的请求时由处理器提供用于半导体器件评估的实例的表模型。所述方法还包括在所述表模型中生成所述一个或多个测量值的表条目，所述表条目包括所述实例的评估函数的一个或多个评估值。

3. 发明授权

US5418974A Circuit design method and system therefor 失效
标题翻译：电路设计方法及其系统
公开(公告)号：US5418974A
公开(公告)日：1995-05-23
申请号：US958389
申请日：1992-10-08
申请人： Barry G. Craft , Rocco A. Crea , Richard D. Kimmel
发明人： Barry G. Craft , Rocco A. Crea , Richard D. Kimmel
IPC分类号： G06F17/50 , G06F7/544 , G06F11/16 , G06F15/20 , G06F15/60
CPC分类号： G06F17/5063
摘要： A system and method for designing a structure such as a circuit. First the sensitivity of a circuit performance function (sensitivity data set - SDS) to at least one physical parameter is determined. Then, an estimated distribution of the design function calculated by using the SDS and random parameter values. Subsequently, the parameters corresponding to the estimated distribution was used to accurately calculate the tail. The tail is compared to a predetermined design objectives. If the objectives are not met, the design is modified and the calculation steps repeated until the design objectives are met.
摘要翻译：一种用于设计诸如电路之类的结构的系统和方法。首先确定电路性能函数（灵敏度数据集-SDS）至少一个物理参数的灵敏度。然后，使用SDS和随机参数值计算出的设计函数的估计分布。随后，使用与估计分布对应的参数来准确计算尾部。尾部与预定的设计目标进行比较。如果不符合目标，则对设计进行修改，并重复计算步骤，直到满足设计目标。

4. 发明授权

US5369594A Conjugate gradient method in computer-aided circuit design 失效
标题翻译：计算机辅助电路设计中的共轭梯度法
公开(公告)号：US5369594A
公开(公告)日：1994-11-29
申请号：US900976
申请日：1992-06-18
申请人： Ching-Chao Huang , Richard D. Kimmel
发明人： Ching-Chao Huang , Richard D. Kimmel
IPC分类号： G06F17/50 , G06F15/60
CPC分类号： G06F17/5036
摘要： The present invention relates to an improved method for computer-aided electrical circuit simulation which combines circuit partitioning, modified nodal formulation and conjugate-gradient solution method to efficiently analyze large electrical circuit networks. Circuit partitioning is used to create sub-circuits which isolate the passive elements of the electrical circuit. Modified nodal formulation is used to formulate matrices representative of the resultant sub-circuits. All matrices resulting from the sub-circuits containing only passive elements will be positive-definite symmetric and are efficiently solved using conjugate gradient method. Conjugate-gradient method is known to be an extremely efficient method for solving matrices of this type.
摘要翻译：本发明涉及一种电脑划分，修改节点配方和共轭梯度解决方案的计算机辅助电路仿真改进方法，有效地分析了大型电路网络。电路划分用于创建隔离电路的无源元件的子电路。改进的节点公式用于制定表示所得子电路的矩阵。由仅包含无源元件的子电路产生的所有矩阵将是正定对称的，并且使用共轭梯度法有效地求解。已知共轭梯度法是解决这种类型矩阵的极其有效的方法。

5. 发明授权

US4651302A Read only memory including an isolation network connected between the array of memory cells and the output sense amplifier whereby reading speed is enhanced 失效
标题翻译：只读存储器，包括连接在存储器单元阵列和输出读出放大器之间的隔离网络，从而增强读取速度
公开(公告)号：US4651302A
公开(公告)日：1987-03-17
申请号：US674213
申请日：1984-11-23
申请人： Richard D. Kimmel , Ronald W. Knepper , Richard Levi
发明人： Richard D. Kimmel , Ronald W. Knepper , Richard Levi
IPC分类号： G11C17/08 , G11C17/00
CPC分类号： G11C17/08
摘要： A read only memory utilizing a two-level cascoded current steering approach feeding a two-level common base isolation and sense amplifier network. The isolation network allows formation of a multi-way collector dot without deleterious effect upon the high speed current sensing operation. Single transistor cells with a common subcollector bed and common base rails as word lines make up the highly dense high speed array. The current source is provided by a current mirror circuit. The common-base, low impedance sense amplifier converts the sense current signal into a voltage swing which is then fed to the off-chip driver circuit via an emitter-follower pre-driver stage.
摘要翻译：一个只读存储器，利用两级共源电流导向方式馈电两级公共基极隔离和读出放大器网络。隔离网络允许形成多路收集器点，而不会对高速电流感测操作产生有害影响。具有公共子集电极床的单晶体管单元和作为字线的公共基座构成高密度高速阵列。电流源由电流镜电路提供。共模低阻抗读出放大器将感测电流信号转换成电压摆幅，然后通过发射极跟随器预驱动器级馈送到片外驱动电路。

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