Method for dynamically switching analyses and for dynamically switching models in circuit simulators
    1.
    发明授权
    Method for dynamically switching analyses and for dynamically switching models in circuit simulators 有权
    用于动态切换分析和在电路模拟器中动态切换模型的方法

    公开(公告)号:US08959008B2

    公开(公告)日:2015-02-17

    申请号:US13023559

    申请日:2011-02-09

    CPC classification number: G06F17/5022 G06F17/5036

    Abstract: Performing a transient analysis with a compact FET model that is predominantly intended for DC analysis, such as an IDDQ leakage model, to enable toggling logic states in sequential logic circuits that cannot otherwise be examined in a DC analysis. An embodiment enables examining the DC or AC conditions of any logic state of any logic circuit in a DC or AC analysis, and additionally, it eliminates a potentially long execution time of a transient analysis with a DC model. Further solved is the present need to run two simulations and to maintain two netlists in order to overcome being unable to toggle certain logic states in the DC analysis. The invention achieves the aforementioned in a single simulation with a single netlist that calculates the DC operating circuit conditions with a model A on the fly at predetermined times or in certain logic states, during a transient analysis with a model B.

    Abstract translation: 使用主要用于直流分析(例如IDDQ泄漏模型)的紧凑型FET模型进行瞬态分析,以便能够在不能在DC分析中检查的顺序逻辑电路中切换逻辑状态。 一个实施例能够检查DC或AC分析中任何逻辑电路的任何逻辑状态的DC或AC条件,此外,它消除了具有DC模型的瞬态分析的潜在长的执行时间。 进一步的解决是目前需要运行两个模拟并且维护两个网表,以克服在DC分析中不能切换某些逻辑状态。 本发明在具有单个网表的单个模拟中实现上述,在单个网表中,在模型B的瞬态分析期间,在预定时间或在某些逻辑状态下,用模型A计算直流运行电路条件。

    STATIC NOISE MARGIN MONITORING CIRCUIT AND METHOD
    2.
    发明申请
    STATIC NOISE MARGIN MONITORING CIRCUIT AND METHOD 有权
    静噪噪声监测电路及方法

    公开(公告)号:US20130221987A1

    公开(公告)日:2013-08-29

    申请号:US13407822

    申请日:2012-02-29

    CPC classification number: G11C29/50 G11C11/41 G11C2029/0409 G11C2029/5002

    Abstract: A monitoring circuit and method, wherein a voltage waveform having a linear falling edge is applied to a first node of at least one test memory cell (e.g., a plurality of test memory cells connected in parallel). The input voltage at the first node is captured when the output voltage at a second node of the test memory cell(s) rises above a high reference voltage during the falling edge. Then, a difference is determined between the input voltage as captured and either (1) the output voltage at the second node, as captured when the input voltage at the first node falls below the first reference voltage during the falling edge, or (2) a low reference voltage. This difference is proportional to the static noise margin (SNM) of the test memory cell(s) such that any changes in the difference noted with repeated monitoring are indicative of corresponding changes in the SNM.

    Abstract translation: 一种监视电路和方法,其中具有线性下降沿的电压波形被施加到至少一个测试存储器单元(例如,并联连接的多个测试存储单元)的第一节点。 当在下降沿期间,当测试存储单元的第二个节点处的输出电压上升到高于参考电压时,捕获第一节点处的输入电压。 然后,在捕获的输入电压和(1)第二节点处的输出电压之间确定差异,如在第一节点处的输入电压在下降沿期间低于第一参考电压时捕获的,或者(2) 低参考电压。 该差异与测试存储器单元的静态噪声容限(SNM)成比例,使得通过重复监测指出的差异中的任何变化表示SNM的相应变化。

    Method for Dynamically Switching Analyses and For Dynamically Switching Models in Circuit Simulators
    5.
    发明申请
    Method for Dynamically Switching Analyses and For Dynamically Switching Models in Circuit Simulators 有权
    用于动态切换分析和电路模拟器动态切换模型的方法

    公开(公告)号:US20120203532A1

    公开(公告)日:2012-08-09

    申请号:US13023559

    申请日:2011-02-09

    CPC classification number: G06F17/5022 G06F17/5036

    Abstract: Performing a transient analysis with a compact FET model that is predominantly intended for DC analysis, such as an IDDQ leakage model, to enable toggling logic states in sequential logic circuits that cannot otherwise be examined in a DC analysis. An embodiment enables examining the DC or AC conditions of any logic state of any logic circuit in a DC or AC analysis, and additionally, it eliminates a potentially long execution time of a transient analysis with a DC model. Further solved is the present need to run two simulations and to maintain two netlists in order to overcome being unable to toggle certain logic states in the DC analysis. The invention achieves the aforementioned in a single simulation with a single netlist that calculates the DC operating circuit conditions with a model A on the fly at predetermined times or in certain logic states, during a transient analysis with a model B.

    Abstract translation: 使用主要用于直流分析(例如IDDQ泄漏模型)的紧凑型FET模型进行瞬态分析,以便能够在不能在DC分析中检查的顺序逻辑电路中切换逻辑状态。 一个实施例能够检查DC或AC分析中任何逻辑电路的任何逻辑状态的DC或AC条件,此外,它消除了具有DC模型的瞬态分析的潜在长的执行时间。 进一步的解决是目前需要运行两个模拟,并维护两个网表,以克服在DC分析中不能切换某些逻辑状态。 本发明在具有单个网表的单个模拟中实现上述,在单个网表中,在模型B的瞬态分析期间,在预定时间或在某些逻辑状态下,用模型A计算直流运行电路条件。

    Protection against charging damage in hybrid orientation transistors
    6.
    发明授权
    Protection against charging damage in hybrid orientation transistors 有权
    在混合取向晶体管中防止充电损坏

    公开(公告)号:US07928513B2

    公开(公告)日:2011-04-19

    申请号:US12317310

    申请日:2008-12-22

    Abstract: A chip can include a CMOS structure having a bulk device disposed in a first region of a semiconductor substrate in conductive communication with an underlying bulk region of the substrate, the first region and the bulk region having a first crystal orientation. An SOI device is disposed in a semiconductor-on-insulator (“SOI”) layer separated from the bulk region of the substrate by a buried dielectric layer, the SOI layer having a different crystal orientation from the first crystal orientation. In one example, the bulk device includes a p-type field effect transistor (“PFET”) and the SOI device includes an n-type field effect transistor (“NFET”) device. Alternatively, the bulk device can include an NFET and the SOI device can include a PFET. When the SOI device has a gate conductor in conductive communication with a gate conductor of the bulk device, charging damage can occur to the SOI device, except for the presence of diodes in reverse-biased conductive communication with the bulk region. The diodes are operable to conduct a discharge current to the bulk region when either a voltage on the gate conductor or a voltage on the source or drain region of the SOI device exceeds a diode's breakdown voltage.

    Abstract translation: 芯片可以包括CMOS结构,其具有设置在半导体衬底的第一区域中的体器件,其与衬底的下面的体区域导电连通,第一区域和体区具有第一晶体取向。 SOI器件设置在绝缘体上半导体(“SOI”)层中,其通过掩埋电介质层与衬底的本体区域分离,SOI层具有与第一晶体取向不同的晶体取向。 在一个示例中,体器件包括p型场效应晶体管(“PFET”),并且SOI器件包括n型场效应晶体管(“NFET”)器件。 或者,体器件可以包括NFET,并且SOI器件可以包括PFET。 当SOI器件具有与本体器件的栅极导体导通的栅极导体时,除了存在与体区域反向偏置导电连通的二极管之外,SOI器件可能发生充电损坏。 当栅极导体上的电压或SOI器件的源极或漏极区域上的电压超过二极管的击穿电压时,二极管可操作以将放电电流传导到体区。

    Methods of improving operational parameters of pair of matched transistors and set of transistors
    8.
    发明授权
    Methods of improving operational parameters of pair of matched transistors and set of transistors 失效
    改进一对匹配晶体管和晶体管组的运行参数的方法

    公开(公告)号:US07516426B2

    公开(公告)日:2009-04-07

    申请号:US11561537

    申请日:2006-11-20

    CPC classification number: H01L27/088 H01L21/823437 H01L27/0207

    Abstract: Methods of improving operational parameters between at least a pair of matched transistors, and a set of transistors, are disclosed. One embodiment of a method includes a method of improving at least one of a threshold voltage (Vt) mismatch and current drive between at least a pair of matched transistors for analog applications, the method comprising: forming at least a pair of transistors, each with a gate having a plurality of connected fingers; and optimizing a total length of a channel under the plurality of fingers to attain at least one of: a) a reduced threshold voltage mismatch between the at least pair of transistors, and b) increased current drive for a given threshold voltage mismatch, between the at least pair of transistors, each finger having a length less than an overall length of the channel.

    Abstract translation: 公开了改善至少一对匹配晶体管之间的操作参数的方法和一组晶体管。 方法的一个实施例包括一种改进用于模拟应用的至少一对匹配晶体管之间的阈值电压(Vt)失配和电流驱动中的至少一个的方法,所述方法包括:形成至少一对晶体管,每个晶体管具有 具有多个连接的手指的门; 以及优化所述多个指状物下的通道的总长度以达到以下至少一个:a)所述至少一对晶体管之间的阈值电压失配降低,以及b)对于给定阈值电压失配的增加的电流驱动, 至少一对晶体管,每个手指的长度小于通道的总长度。

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