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公开(公告)号：US20090199036A1
公开(公告)日：2009-08-06
申请号：US12023337
申请日：2008-01-31
申请人： James D. Warnock , Wendel Dieter , David E. Lackey , William Vincent Huott , Leon Jacob Sigal , Louis Bernard Bushard , Sang Hoo Dhong
发明人： James D. Warnock , Wendel Dieter , David E. Lackey , William Vincent Huott , Leon Jacob Sigal , Louis Bernard Bushard , Sang Hoo Dhong
IPC分类号： G06F1/00
CPC分类号： G01R31/318594 , G01R31/318552
摘要： A method, system and program are provided for generating level sensitive scan design (LSSD) clock signals from a general scan design (GSD) clock buffer using an intermediate clock signal and one or more first mode control signals to generate a plurality of LSSD clock signals from an output section of the GSD clock buffer that receives the intermediate clock signal and the first mode control signal(s), where the GSD clock buffer is also configured to generate a plurality of GSD clock signals in response to receiving a GSD mode, generating an intermediate clock signal from the input section of the GSD clock buffer in response receiving a GSD mode signal.
摘要翻译： 提供了一种方法，系统和程序，用于使用中间时钟信号和一个或多个第一模式控制信号从一般扫描设计（GSD）时钟缓冲器产生电平敏感扫描设计（LSSD）时钟信号，以产生多个LSSD时钟信号 从GSD时钟缓冲器的输出部分接收中间时钟信号和第一模式控制信号，其中GSD时钟缓冲器还被配置为响应于接收GSD模式产生多个GSD时钟信号，产生 来自GSD时钟缓冲器的输入部分的中间时钟信号响应于接收GSD模式信号。
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公开(公告)号：US08117579B2
公开(公告)日：2012-02-14
申请号：US12023337
申请日：2008-01-31
申请人： James Douglas Warnock , Wendel Dieter , David E. Lackey , William Vincent Huott , Leon Jacob Sigal , Louis Bernard Bushard , Sang Hoo Dhong
发明人： James Douglas Warnock , Wendel Dieter , David E. Lackey , William Vincent Huott , Leon Jacob Sigal , Louis Bernard Bushard , Sang Hoo Dhong
IPC分类号： G06F17/50
CPC分类号： G01R31/318594 , G01R31/318552
摘要： A method, system and program are provided for generating level sensitive scan design (LSSD) clock signals from a general scan design (GSD) clock buffer using an intermediate clock signal and one or more first mode control signals to generate a plurality of LSSD clock signals from an output section of the GSD clock buffer that receives the intermediate clock signal and the first mode control signal(s), where the GSD clock buffer is also configured to generate a plurality of GSD clock signals in response to receiving a GSD mode, generating an intermediate clock signal from the input section of the GSD clock buffer in response receiving a GSD mode signal.
摘要翻译： 提供了一种方法，系统和程序，用于使用中间时钟信号和一个或多个第一模式控制信号从一般扫描设计（GSD）时钟缓冲器产生电平敏感扫描设计（LSSD）时钟信号，以产生多个LSSD时钟信号 从GSD时钟缓冲器的输出部分接收中间时钟信号和第一模式控制信号，其中GSD时钟缓冲器还被配置为响应于接收到GSD模式产生多个GSD时钟信号，产生 来自GSD时钟缓冲器的输入部分的中间时钟信号响应于接收GSD模式信号。
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公开(公告)号：US5757682A
公开(公告)日：1998-05-26
申请号：US414072
申请日：1995-03-31
CPC分类号： G06F5/012 , G06F7/483 , G06F7/49952 , G06F7/49957
摘要： A system implementing a methodology for determining the exponent in parallel with determining the fractional shift during normalization according to partitioning the exponent into partial exponent groups according to the fractional shift data flow, determining all possible partial exponent values for each partial exponent group according to the fractional data flow, and providing the exponent by selectively combining possible partial exponents from each partial exponent group according to the fractional data flow. There is also provided a system implementing a methodology for generating the sticky bit during normalization. Sticky bit information is precalculated and multiplexed according to the fractional dataflow. In an embodiment of the invention, group sticky signals are calculated in tree form, each group sticky having a number of possible sticky bits corresponding to the shift increment amount of the multiplexing. The group sticky bits are further multiplexed according to subsequent shift amounts in the fractional dataflow to provide an output sticky bit at substantially the same time as when the final fractional shift amount is available, and thereby at substantially the same time as the normalized fraction.
摘要翻译： 根据分数位移数据流，根据将指数分解成部分指数组，实现用于在归一化期间确定分数移位的方法来确定指数的方法的系统，根据分数确定每个部分指数组的所有可能的部分指数值 数据流，并且通过根据分数据流选择性地组合来自每个部分指数组的可能部分指数来提供指数。 还提供了一种实现在归一化过程中产生粘性位的方法的系统。 粘滞位信息根据分数据流进行预先计算和复用。 在本发明的一个实施例中，以树形式计算组粘性信号，每组粘性具有与多路复用的移位增量量相对应的多个可能的粘性位。 组粘性位根据分数据流中的随后的移位量进一步复用，以在与最终分数移位量可用时基本相同的时间提供输出粘性位，并且因此与归一化分数基本上相同。
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公开(公告)号：US5910730A
公开(公告)日：1999-06-08
申请号：US764951
申请日：1996-12-13
申请人： Leon Jacob Sigal
发明人： Leon Jacob Sigal
IPC分类号： H03K19/003 , H03K17/16
CPC分类号： H03K19/00361
摘要： The present invention provides a circuit for increasing the noise tolerance of a receiving gate. This is accomplished by separating the circuit which sets the positive going threshold, from the circuit which sets the negative going threshold. This eliminates the need of making a design compromise equally suitable to both these threshold requirements. It is achieved by separating the logical drive for switching from a low to a high from the logical drive for switching from a high to a low. Alternate embodiments are presented. In one embodiment, separate drivers for PFET and NFET inverter inputs are employed together with an output latch circuit which prevents the output from being in a floating state. In an alternate embodiment the latch is included in-line with the gate output. An implementation of the invention in a two input AND gate is also described.
摘要翻译： 本发明提供一种用于增加接收门的噪声容限的电路。 这是通过将设置正向阈值的电路与设置负向阈值的电路分开来实现的。 这样就不需要设计同样适用于这两个阈值要求的设计。 通过将用于从低电平切换到高电平的逻辑驱动器与用于从高电平切换到低电平的逻辑驱动器分离来实现。 呈现替代实施例。 在一个实施例中，用于PFET和NFET反相器输入的单独驱动器与输出锁存电路一起使用，该输出锁存电路防止输出处于浮置状态。 在替代实施例中，锁存器与栅极输出端对齐。 还描述了在两个输入“与”门中的本发明的实现。
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公开(公告)号：US5742536A
公开(公告)日：1998-04-21
申请号：US478416
申请日：1995-06-07
CPC分类号： G06F5/012 , G06F7/483 , G06F7/49952 , G06F7/49957
摘要： A system implementing a methodology for determining the exponent in parallel with determining the fractional shift during normalization according to partitioning the exponent into partial exponent groups according to the fractional shift data flow, determining all possible partial exponent values for each partial exponent group according to the fractional data flow, and providing the exponent by selectively combining possible partial exponents from each partial exponent group according to the fractional data flow. There is also provided a system implementing a methodology for generating the sticky bit during normalization. Sticky bit information is precalculated and multiplexed according to the fractional dataflow. In an embodiment of the invention, group sticky signals are calculated in tree form, each group sticky having a number of possible sticky bits corresponding to the shift increment amount of the multiplexing. The group sticky bits are further multiplexed according to subsequent shift amounts in the fractional damflow to provide an output sticky bit at substantially the same time as when the final fractional shift amount is available, and thereby at substantially the same time as the normalized fraction.
摘要翻译： 根据分数位移数据流，根据将指数分解成部分指数组，实现用于在归一化期间确定分数移位的方法来确定指数的方法，根据分数确定每个部分指数组的所有可能的部分指数值 数据流，并且通过根据分数据流选择性地组合来自每个部分指数组的可能部分指数来提供指数。 还提供了一种实现在归一化过程中产生粘性位的方法的系统。 粘滞位信息根据分数据流进行预先计算和复用。 在本发明的一个实施例中，以树形式计算组粘性信号，每组粘性具有与多路复用的移位增量量相对应的多个可能的粘性位。 组粘性位根据分数阻力流中的后续移位量进一步复用，以在与最终分数位移量可用时基本相同的时间提供输出粘性位，从而与标准化分数基本上相同。
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公开(公告)号：US5742535A
公开(公告)日：1998-04-21
申请号：US461676
申请日：1995-06-05
CPC分类号： G06F5/012 , G06F7/483 , G06F7/49952 , G06F7/49957
摘要： A system implementing a methodology for determining the exponent in parallel with determining the fractional shift during normalization according to partitioning the exponent into partial exponent groups according to the fractional shift data flow, determining all possible partial exponent values for each partial exponent group according to the fractional data flow, and providing the exponent by selectively combining possible partial exponents from each partial exponent group according to the fractional data flow. There is also provided a system implementing a methodology for generating the sticky bit during normalization. Sticky bit information is precalculated and multiplexed according to the fractional dataflow. In an embodiment of the invention, group sticky signals are calculated in tree form, each group sticky having a number of possible sticky bits corresponding to the shift increment amount of the multiplexing. The group sticky bits are further multiplexed according to subsequent shift amounts in the fractional dataflow to provide an output sticky bit at substantially the same time as when the final fractional shift amount is available, and thereby at substantially the same time as the normalized fraction.
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