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1. 发明授权

US07362836B2 Method for selecting optimum sampling parameters for a plurality of data receivers having at least one sampling parameter in common 失效
标题翻译：用于为具有共同的至少一个采样参数的多个数据接收机选择最佳采样参数的方法
公开(公告)号：US07362836B2
公开(公告)日：2008-04-22
申请号：US11115660
申请日：2005-04-27
申请人： Richard A Nygaard, Jr.
发明人： Richard A Nygaard, Jr.
IPC分类号： H04L7/00 , H04B7/00
CPC分类号： G01R31/3191 , G01R31/31726 , G01R31/3177
摘要： Eye diagrams are made for signals on each channel in a group thereof. Outlying signals that do not exhibit overlap for a sampling parameter that is to be common for all channels may be ignored and a warning given. Selected, normalized eye openings are used to discover optimum sampling parameters for each channel. Locations within each eye opening are ranked according to preference. Algorithms are used to select a single best value for a sampling parameter common to all the channels, and the corresponding best other sampling parameter is found for each channel. One algorithm disregards good choices for many channels to accommodate any remaining channel by using only a commonly agreed upon value (a jury system). Another algorithm gives weight to a choice according to the number of channels that agree on that choice (majority rule). A graphical user interface facilitates the selection, and emphasizes which sampling parameters are constrained to vary together.
摘要翻译：为其组中的每个通道上的信号制作眼图。对于所有通道共同的采样参数不显示重叠的外部信号可能会被忽略，并给出警告。选择的，归一化的眼睛开口用于发现每个通道的最佳采样参数。每个眼睛开放中的位置根据偏好进行排序。算法用于为所有通道公共的采样参数选择单个最佳值，并为每个通道找到相应的最佳其他采样参数。一种算法忽略了许多渠道的良好选择，以便通过仅使用共同商定的价值（陪审团系统）来容纳任何剩余的渠道。另一种算法根据对该选择（多数规则）达成一致的渠道数量给予选择权重。图形用户界面便于选择，并强调哪些采样参数被约束以一起变化。

2. 发明授权

US06871152B2 Method and apparatus for performing eye diagram measurements 失效
公开(公告)号：US06871152B2
公开(公告)日：2005-03-22
申请号：US10824680
申请日：2004-04-15
申请人： Richard A Nygaard, Jr.
发明人： Richard A Nygaard, Jr.
IPC分类号： H04L1/24 , G06G7/02
CPC分类号： H04L1/24
摘要： An eye diagram analyzer equips each SUT data and clock signal input channel with individually variable delays in their respective paths. For a range of signal delay of n-many SUT clock cycles, the SUT clock signal delay might be set at about n/2. For each data channel there is specified a point in time relative to an instance of the delayed clock signal (data signal delay) and a voltage threshold. The specified combination (data signal delay, threshold and which channel) is a location on an eye diagram, although the trace may or may not ever go through that location. A counter counts the number of SUT clock cycles used as instances of the reference for the eye diagram, and another counter counts the number of times the specified combination of conditions was met (“hits”). After watching a specified combination for the requisite length of time or number of events, the number of SUT clock cycles involved and the associated number of hits are stored in memory using a data structure indexed by the components of the specified combination (data signal delay, threshold). Next, a new combination of data signal delay and threshold is specified and a measurement taken and recorded in the data structure. The process is repeated until all possible combinations within a stated range of data signal delay and threshold voltage (using specified resolution/step sizes for delay and voltage) have been investigated. As this process proceeds under the control of firmware within the logic analyzer, other firmware can be examining the data structure and generating a partial eye diagram visible on a display, and that will be complete soon after the measurement itself is finished.” has been changed to “An eye diagram analyzer equips each SUT data and clock signal input channel with individually variable delays in their respective paths. For a range of signal delay of n-many SUT clock cycles, the SUT clock signal delay might be set at about n/2. For each data channel there is specified a point in time relative to an instance of the delayed clock signal (data signal delay) and a voltage threshold. The specified combination (data signal delay, threshold and which channel) is a location on an eye diagram, although the trace may or may not ever go through that location.

3. 发明授权

US06810346B2 Composite eye diagrams 失效
标题翻译：复合眼图
公开(公告)号：US06810346B2
公开(公告)日：2004-10-26
申请号：US10061918
申请日：2002-01-31
申请人： Richard A Nygaard, Jr. , Jeffrey John Haeffele
发明人： Richard A Nygaard, Jr. , Jeffrey John Haeffele
IPC分类号： G01R2728
CPC分类号： G01R31/31711 , G01R13/029 , G01R31/31901 , G01R31/3191 , G01R31/31912 , G01R31/31937
摘要： An eye diagram analyzer assigns a plurality of SUT data signals to be members of a labeled group of channels. There may be a plurality of such groups. In addition to mere superposition in an (X, Y) display space of the various i-many (X, Y)-valued pixels for individual component eye diagrams associated with that group, other measured data for those pixels within a group can be merged in various different modes to produce corresponding composite eye diagram presentations. E.g., in a Normalized Signal Density Mode the number of hits at each trial measurement point is summed over all channels in the group, and then divided by the total number of clock cycles measured for the ith measurement point in that group to produce a density Di associated with the corresponding ith pixel: (Xi, Yi, Di). If Di is rendered as a color or an intensity, the resulting eye diagram includes a representation (the Di) of a normalized density of transitions at each point (Xi, Yi), relative to that group as a whole. As a further example, in a Channel Density Mode, each Di is produced by accumulating, for each of N-many channels, a 1/N for each sample (value of i) with non-zero signal activity, and dividing the accumulation by N. If that collection of Di is rendered as a color or an intensity, the resulting composite eye diagram includes a representation (the Di) at each (Xi, Yi) point of the degree of coincidence among, or a degree of similarity between, the channels in the group.
摘要翻译：眼图分析仪将多个SUT数据信号分配为标记的信道组的成员。可以存在多个这样的组。除了在与该组相关联的单个组件眼图的各种i多（X，Y））值的（X，Y）值显示空间中的单独叠加之外，可以合并组内的那些像素的其他测量数据在各种不同的模式下产生相应的复合眼图演示。例如，在归一化信号密度模式中，每个试验测量点处的命中数量在组中的所有通道上相加，然后除以该组中第i个测量点测量的总时钟周期数，以产生密度Di 与相应的第i个像素相关：（Xi，Yi，Di）。如果Di被渲染为颜色或强度，则所得到的眼图包括相对于该组作为整体的每个点（Xi，Yi）处的过渡的归一化密度的表示（Di）。作为另一示例，在通道密度模式中，通过针对N个多个信道中的每一个为非零信号活动的每个采样（i值）累积1 / N，并且将累加除以如果将Di的集合呈现为颜色或强度，则所得到的复合眼图包括在每个（Xi，Yi）点处的表示（Di）之间的一致性或相似度之间的一致性，组中的渠道。

4. 发明授权

US06785622B2 Method and apparatus for performing eye diagram measurements 有权
标题翻译：执行眼图测量的方法和装置
公开(公告)号：US06785622B2
公开(公告)日：2004-08-31
申请号：US10020673
申请日：2001-10-29
申请人： Richard A Nygaard, Jr.
发明人： Richard A Nygaard, Jr.
IPC分类号： G06G702
CPC分类号： H04L1/24
摘要： An eye diagram analyzer equips each SUT data and clock signal input channel with individually variable delays in their respective paths. For a range of signal delay of n-many SUT clock cycles, the SUT clock signal delay might be set at about n/2. For each data channel there is specified a point in time relative to an instance of the delayed clock signal (data signal delay) and a voltage threshold. The specified combination (data signal delay, threshold and which channel) is a location on an eye diagram, although the trace may or may not ever go through that location. A counter counts the number of SUT clock cycles used as instances of the reference for the eye diagram, and another counter counts the number of times the specified combination of conditions was met (“hits”). After watching a specified combination for the requisite length of time or number of events, the number of SUT clock cycles involved and the associated number of hits are stored in memory using a data structure indexed by the components of the specified combination (data signal delay, threshold). Next, a new combination of data signal delay and threshold is specified and a measurement taken and recorded in the data structure. The process is repeated until all possible combinations within a stated range of data signal delay and threshold voltage (using specified resolution/step sizes for delay and voltage) have been investigated. As this process proceeds under the control of firmware within the logic analyzer, other firmware can be examining the data structure and generating a partial eye diagram visible on a display, and that will be complete soon after the measurement itself is finished.
摘要翻译：一个眼图分析仪为每个SUT数据和时钟信号输入通道在各自的路径中分别具有可变延迟。对于n个许多SUT时钟周期的信号延迟范围，SUT时钟信号延迟可能设置在大约n / 2。对于每个数据通道，指定相对于延迟的时钟信号（数据信号延迟）的实例和电压阈值的时间点。指定的组合（数据信号延迟，阈值和哪个通道）是眼图上的位置，尽管迹线可能或不会经过该位置。计数器对用作眼图参考实例的SUT时钟周期数进行计数，另一个计数器计算满足指定的条件组合的次数（“命中”）。在所需时间长度或事件数量观察指定的组合之后，使用由指定组合的分量索引的数据结构（数据信号延迟，阈）。接下来，指定数据信号延迟和阈值的新组合，并在数据结构中进行测量并记录。重复该过程，直到已经研究了所规定的数据信号延迟和阈值电压范围内的所有可能的组合（使用指定的分辨率/用于延迟和电压的步长）。当该过程在逻辑分析仪内的固件的控制下进行时，其他固件可以检查数据结构并产生在显示器上可见的部分眼图，并且将在测量本身完成之后立即完成。

5. 发明授权

US06760676B2 On-screen tools for eye diagram measurements 失效
公开(公告)号：US06760676B2
公开(公告)日：2004-07-06
申请号：US10210025
申请日：2002-07-31
申请人： Richard A Nygaard, Jr.
发明人： Richard A Nygaard, Jr.
IPC分类号： G06F1900
CPC分类号： H04L1/24
摘要： Once an eye diagram measurement is begun and there is an eye diagram displayed, different on-screen measurement tools may be used singly, or in combination. Each measurement involves indicating with cursors and line segments regions of the eye diagram that are of interest, and a parameter or parameters associated with each measurement tool in use is reported in a (usually) separate area of the display. An Eye Limits measurement allows the specification of a point within an eye diagram, whereupon it finds and reports the eye diagram coordinates first encountered along horizontal and vertical lines extended from the selected point (i.e., “eye opening” size). The coordinates of the point itself are also reported. A Four Point Box measurement allows the construction on the eye diagram of a rectangle having sides parallel to the coordinate axes of the eye diagram. The coordinates of the rectangle are reported, as well as information about the number of points on the eye diagram that occur on or within the rectangle. A Six Point Box and a Diamond may be defined and used in a like fashion. A Slope Tool uses two end points to define an intervening line segment, whose slope and location can be adjusted to match some region of interest on the eye diagram. The pertinent information about the line segment and its end points is then reported. A Histogram measurement may be performed on any selected slice of the eye diagram. The histogram is thus of a distribution of number of hits versus either time axis location at a fixed voltage, or voltage at a fixed time location. Duplicate cursors appear on both the line defining the slice and within the histogram. Either cursor can be grabbed and moved, which then also moves the other. The scale for the number of hits for either histogram may be either linear or logarithmic.

6. 发明授权

US06668235B2 Identification of channels and associated signal information contributing to a portion of a composite eye diagram 失效
公开(公告)号：US06668235B2
公开(公告)日：2003-12-23
申请号：US10109282
申请日：2002-03-28
申请人： Richard A Nygaard, Jr. , Jeffrey John Haeffele
发明人： Richard A Nygaard, Jr. , Jeffrey John Haeffele
IPC分类号： G01R1300
CPC分类号： G01R31/31711 , G01R31/31901 , G01R31/31912
摘要： An eye diagram analyzer can assign a plurality of SUT data signals to be members of a labeled group of channels. There may be a plurality of such groups. The measured data for components within a group can be merged according to various different modes into a composite eye diagram presentation. When a composite eye diagram is being displayed, the operator may position a screen pointer (cursor) over some interesting part of the eye diagram, and the analyzer will display a list those channels that contributed to the displayed pixels in that part of the eye diagram, as well as other related information. The operator may also select a channel from among the group, and then have the displayed pixels for which it is responsible be displayed in a selected color or otherwise highlighted in a way that allows them to be distinguished from all others.

7. 发明授权

US6131175A Automatic selection of a special mode of operation in multi-channel test equipment 失效
标题翻译：自动选择多通道测试设备的特殊操作模式
公开(公告)号：US6131175A
公开(公告)日：2000-10-10
申请号：US15738
申请日：1998-01-29
申请人： Richard A. Nygaard, Jr.
发明人： Richard A. Nygaard, Jr.
IPC分类号： G01R31/28
CPC分类号： G01R31/2834
摘要： Multi-channel measurement equipment enters or performs a special mode of operation in response to an arbitrarily chosen probe being momentarily touched to a special terminal. A signal identifiable by its uncommon properties is present at the special terminal. The uncommon signal is generated by a suitable circuit, which may be similar to a pseudo random sequence generator. Each channel is equipped with a recognition circuit that recognizes the presence of the uncommon signal. The recognition circuits each receive a copy of the uncommon ID signal, and the task of recognition is performed by pattern matching over time. To enter or perform the special mode the operator touches the probe to the special terminal. After a suitable but brief period of time the recognition circuit for that probe produces an output that indicates recognition. The measurement equipment responds by entering or performing the special mode of operation. The special mode of operation may be ended by touching again touching the probe to the special terminal, by some other manual action, such as a keystroke or mouse click, or by some other event within the context of the special mode.
摘要翻译：多通道测量设备响应于任意选择的探头瞬间触摸到特殊终端进入或执行特殊操作模式。通过其不常见特性可识别的信号存在于特殊终端。不常见的信号由合适的电路产生，该电路可以类似于伪随机序列发生器。每个通道都配备有识别不常见信号的识别电路。识别电路各自接收不常见ID信号的副本，并且通过随时间的模式匹配来执行识别任务。要进入或执行特殊模式，操作员将探头接触到特殊端子。在适当但短暂的时间段之后，该探头的识别电路产生指示识别的输出。测量设备通过输入或执行特殊操作模式进行响应。可以通过一些其他手动操作（例如按键或鼠标点击）或在特殊模式的上下文中的某些其他事件触摸再次触摸探头到特殊终端来结束特殊操作模式。

8. 发明授权

US08018989B2 System and method for adjusting a serial communications link 失效
标题翻译：用于调整串行通信链路的系统和方法
公开(公告)号：US08018989B2
公开(公告)日：2011-09-13
申请号：US11962574
申请日：2007-12-21
申请人： Richard A. Nygaard, Jr. , Robert Saponas , William C. Schulze , Hugh S. Conely Wallace
发明人： Richard A. Nygaard, Jr. , Robert Saponas , William C. Schulze , Hugh S. Conely Wallace
IPC分类号： H04B3/46
CPC分类号： H04B17/19 , H04B17/00 , H04B17/20
摘要： A system for adjusting a serial communications link includes a system under test including at least one transmitter and at least one receiver coupled together via a serial data communications link, wherein at least one of the transmitter and the receiver has at least one tunable parameter, at least one controller coupled to at least one of a transmitter and a receiver via a joint test action group JTAG interface, and logic configured to adjust the at least one tunable parameter to optimize a performance of the serial data communications link.
摘要翻译：一种用于调整串行通信链路的系统包括被测系统，包括至少一个发射机和经由串行数据通信链路耦合在一起的至少一个接收机，其中至少一个发射机和接收机具有至少一个可调谐参数，经由联合测试动作组JTAG接口耦合到发射器和接收器中的至少一个的至少一个控制器以及被配置为调整所述至少一个可调谐参数以优化串行数据通信链路的性能的逻辑。

9. 发明授权

US07870445B2 System and method for measuring and depicting performance of a serial communications link 有权
标题翻译：用于测量和描绘串行通信链路性能的系统和方法
公开(公告)号：US07870445B2
公开(公告)日：2011-01-11
申请号：US11962607
申请日：2007-12-21
申请人： Robert Saponas , Richard A. Nygaard, Jr.
发明人： Robert Saponas , Richard A. Nygaard, Jr.
IPC分类号： G06F11/08 , G06F11/24
CPC分类号： G01R31/3171
摘要： A system for measuring performance of a serial communications link includes a system under test including at least one transmitter and at least one receiver coupled together via a serial data communications link, wherein at least one of the transmitter and the receiver has at least one tunable parameter, at least one controller coupled to at least one of a transmitter and a receiver via a joint test action group JTAG interface, and logic configured to perform a bit error ratio test (BERT) at a plurality of receiver phase locations over a defined time period and concluding the BERT for a particular phase location if a BERT error count is greater than 0 at the particular phase location.
摘要翻译：用于测量串行通信链路的性能的系统包括被测系统，包括至少一个发射机和经由串行数据通信链路耦合在一起的至少一个接收机，其中发射机和接收机中的至少一个具有至少一个可调谐参数，经由联合测试动作组JTAG接口耦合到发射器和接收器中的至少一个的至少一个控制器，以及被配置为在所定义的时间段内在多个接收器相位位置执行误比特率测试（BERT）的逻辑并且如果特定相位位置上的BERT错误计数大于0，则针对特定相位位置结束BERT。

10. 发明申请

US20100309968A1 System And Method For Adjusting A Serial Communications Link 失效
标题翻译：用于调整串行通信链路的系统和方法
公开(公告)号：US20100309968A1
公开(公告)日：2010-12-09
申请号：US11962574
申请日：2007-12-21
申请人： Richard A. Nygaard, JR. , Robert Saponas , William C. Schulze , Hugh S. Conely Wallace
发明人： Richard A. Nygaard, JR. , Robert Saponas , William C. Schulze , Hugh S. Conely Wallace
IPC分类号： H04B17/00
CPC分类号： H04B17/19 , H04B17/00 , H04B17/20
摘要： A system for adjusting a serial communications link includes a system under test including at least one transmitter and at least one receiver coupled together via a serial data communications link, wherein at least one of the transmitter and the receiver has at least one tunable parameter, at least one controller coupled to at least one of a transmitter and a receiver via a joint test action group JTAG interface, and logic configured to adjust the at least one tunable parameter to optimize a performance of the serial data communications link.
摘要翻译：一种用于调整串行通信链路的系统包括被测系统，包括至少一个发射机和经由串行数据通信链路耦合在一起的至少一个接收机，其中至少一个发射机和接收机具有至少一个可调谐参数，经由联合测试动作组JTAG接口耦合到发射器和接收器中的至少一个的至少一个控制器以及被配置为调整所述至少一个可调谐参数以优化串行数据通信链路的性能的逻辑。

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