公开(公告)号：US20130147499A1

公开(公告)日：2013-06-13

申请号：US13316373

申请日：2011-12-09

申请人： Masahiro Ishida ,  Daisuke Watanabe ,  Toshiyuki Okayasu ,  Kiyotaka Ichiyama

发明人： Masahiro Ishida ,  Daisuke Watanabe ,  Toshiyuki Okayasu ,  Kiyotaka Ichiyama

IPC分类号： G01R31/00

CPC分类号： G01R31/31924

摘要： A pattern generator generates a pattern signal which represents a test signal to be supplied to a DUT. A driver generates a test signal having a level that corresponds to the pattern signal, and outputs the test signal thus generated to the DUT. A voltage modulator changes, in a predetermined voltage range, the voltage level of the test signal output from the driver DR.

摘要翻译： 模式发生器产生表示要提供给DUT的测试信号的模式信号。 驱动器产生具有对应于模式信号的电平的测试信号，并且将如此产生的测试信号输出到DUT。 电压调制器在预定电压范围内改变从驱动器DR输出的测试信号的电压电平。

公开(公告)号：US20120323519A1

公开(公告)日：2012-12-20

申请号：US13524939

申请日：2012-06-15

申请人： Masahiro ISHIDA ,  Kiyotaka ICHIYAMA

发明人： Masahiro ISHIDA ,  Kiyotaka ICHIYAMA

IPC分类号： G06F19/00

CPC分类号： G01R31/31932 ,  G01R31/31725

摘要： A pattern generator PG generates control data which specifies a threshold voltage to be compared with a signal under test input to an I/O terminal, and generates expected value data which represents an expected value for the comparison result between the signal under test and the threshold voltage. A threshold voltage generator generates the threshold voltage having a voltage level that corresponds to the control data at every setting timing indicated by a first timing signal. A level comparator compares the voltage level of the signal under test with its corresponding threshold voltage. A timing comparator latches the output of the level comparator at a strobe timing indicated by a second timing signal so as to generate a comparison signal. A timing adjustment unit adjusts the phase of the first timing signal.

摘要翻译： 模式发生器PG产生控制数据，该控制数据指定要与I / O端子的被测信号进行比较的阈值电压，并产生表示被测信号与阈值之间的比较结果的期望值的期望值数据 电压。 阈值电压发生器在由第一定时信号指示的每个设定定时产生具有对应于控制数据的电压电平的阈值电压。 电平比较器将被测信号的电压电平与其相应的阈值电压进行比较。 定时比较器在由第二定时信号指示的选通定时处锁存电平比较器的输出，以产生比较信号。 定时调整单元调整第一定时信号的相位。

公开(公告)号：US07834639B2

公开(公告)日：2010-11-16

申请号：US12022162

申请日：2008-01-30

申请人： Kiyotaka Ichiyama ,  Masahiro Ishida

发明人： Kiyotaka Ichiyama ,  Masahiro Ishida

IPC分类号： G01R31/02

CPC分类号： G01R31/31709 ,  H03K3/84 ,  H03K5/156

摘要： Provided is a jitter injection circuit that generates a jittery signal including jitter, including a plurality of delay circuits that receive a supplied reference signal in parallel and that each delay the received reference signal by a preset delay amount and a signal generating section that generates each edge of the jittery signal according to a timing of the signal output by each delay circuit. In the jitter injection circuit the delay amount of at least one delay circuit is set to be a value different from an integer multiple of an average period of the jittery signal.

摘要翻译： 提供了一种抖动注入电路，其产生包括抖动的抖动信号，包括并行接收所提供的参考信号的多个延迟电路，并且每个将接收到的参考信号延迟预设的延迟量，以及产生每个边沿的信号产生部分 根据由每个延迟电路输出的信号的定时的抖动信号。 在抖动注入电路中，将至少一个延迟电路的延迟量设定为与抖动信号的平均周期的整数倍不同的值。

公开(公告)号：US20100106470A1

公开(公告)日：2010-04-29

申请号：US12272810

申请日：2008-11-18

申请人： KIYOTAKA ICHIYAMA ,  MASAHIRO ISHIDA ,  TAKAHIRO YAMAGUCHI

发明人： KIYOTAKA ICHIYAMA ,  MASAHIRO ISHIDA ,  TAKAHIRO YAMAGUCHI

IPC分类号： G06F17/10

CPC分类号： G01R29/26

摘要： Provided is a deterministic component identifying apparatus that identifies a distribution shape of a deterministic component included in a probability density function supplied thereto, comprising a standard deviation calculating section that calculates a standard deviation of the probability density function; a spectrum calculating section that calculates a spectrum of the probability density function; a null frequency detecting section that detects a null frequency of the spectrum; and a ratio calculating section that calculates a ratio between a top portion and a bottom portion of a distribution of the deterministic component, based on the standard deviation of the probability density function and the null frequency of the spectrum.

摘要翻译： 提供了一种确定性分量识别装置，其识别包括在提供给其的概率密度函数中的确定性分量的分布形状，包括：计算概率密度函数的标准偏差的标准偏差计算部分; 频谱计算部分，其计算概率密度函数的频谱; 空频检测部，检测频谱的零频率; 以及比率计算部，其基于概率密度函数的标准偏差和频谱的零频率来计算确定性分量的分布的顶部和底部之间的比率。

公开(公告)号：US20100106468A1

公开(公告)日：2010-04-29

申请号：US12257395

申请日：2008-10-24

申请人： Takahiro Yamaguchi ,  Masahiro Ishida ,  Kiyotaka Ichiyama

发明人： Takahiro Yamaguchi ,  Masahiro Ishida ,  Kiyotaka Ichiyama

IPC分类号： G06F7/60 ,  G06F17/18

CPC分类号： G01R31/31919 ,  G01R29/26 ,  G01R31/2837 ,  G01R31/2894

摘要： There is provided a deterministic component model identifying apparatus for determining a type of a deterministic component contained in a probability density function supplied thereto. The deterministic component model identifying apparatus includes a spectrum calculating section that calculates a spectrum of the probability density function on an axis of a predetermined variable, a null value detecting section that detects a null value on the axis of the predetermined variable in the calculated spectrum, a theoretical value calculating section that calculates a theoretical value of a spectrum of the deterministic component in association with each of a plurality of predetermined deterministic component types, based on the null value detected by the null value detecting section, and a model determining section that determines, as the type of the deterministic component contained in the probability density function, a deterministic component type associated with a logarithmic magnitude spectrum difference most similar to a logarithmic magnitude spectrum of a Gaussian distribution, where the logarithmic magnitude spectrum difference is produced by subtracting the theoretical value of the spectrum of the deterministic component calculated in association with each of the plurality of predetermined deterministic component types from the spectrum calculated by the spectrum calculating section.

摘要翻译： 提供了一种用于确定包含在提供给它的概率密度函数中的确定性分量的类型的确定性分量模型识别装置。 确定性分量模型识别装置包括频谱计算部分，其计算预定变量的轴上的概率密度函数的频谱;空值检测部分，其检测所计算的频谱中的预定变量的轴上的零值; 理论值计算部，基于由空值检测部检测出的空值，与多个预定确定部分类型中的每一个相关联地计算确定性分量的频谱的理论值;以及模型确定部，其确定 ，作为包含在概率密度函数中的确定性分量的类型，与与高斯分布的对数幅度谱最相似的对数幅度谱差相关的确定性分量类型，其中通过减去理论产生对数幅度谱差 根据由频谱计算部分计算的频谱，与多个预定确定性分量类型中的每一个相关联地计算出的确定性分量的频谱的等级值。

公开(公告)号：US20100106457A1

公开(公告)日：2010-04-29

申请号：US12256478

申请日：2008-10-23

申请人： KIYOTAKA ICHIYAMA ,  MASAHIRO ISHIDA ,  TAKAHIRO YAMAGUCHI

发明人： KIYOTAKA ICHIYAMA ,  MASAHIRO ISHIDA ,  TAKAHIRO YAMAGUCHI

IPC分类号： G06F17/18

CPC分类号： H04L1/20

摘要： Provided is a deterministic component model determining apparatus that determines a type of a deterministic component included in a probability density function supplied thereto, comprising a standard deviation calculating section that calculates a standard deviation of the probability density function; a spectrum calculating section that calculates a spectrum of the probability density function; a null frequency detecting section that detects a null frequency of the spectrum; a theoretical value calculating section that calculates a theoretical value of a spectrum for each of a plurality of predetermined types of deterministic components, based on the null frequency; a measured value calculating section that calculates a measured value of the spectrum for the deterministic component included in the probability density function, based on the standard deviation and the spectrum; and a model determining section that determines the type of the deterministic component included in the probability density function to be the type of deterministic component corresponding to a theoretical value closest to the measured value, from among the theoretical values for the plurality of types of deterministic components.

摘要翻译： 提供一种确定性分量模型确定装置，其确定包括在提供给其的概率密度函数中的确定性分量的类型，包括：计算概率密度函数的标准偏差的标准偏差计算部分; 频谱计算部分，其计算概率密度函数的频谱; 空频检测部，检测频谱的零频率; 理论值计算部，其基于所述零频率来计算多个预定类型的确定性分量中的每一个的频谱的理论值; 测量值计算部分，其基于标准偏差和光谱计算包括在概率密度函数中的确定性分量的光谱的测量值; 以及模型确定部分，从多个类型的确定性分量的理论值中，确定包括在概率密度函数中的确定性分量的类型，作为与最接近测量值的理论值相对应的确定性分量的类型 。

公开(公告)号：US20080077342A1

公开(公告)日：2008-03-27

申请号：US11535279

申请日：2006-09-26

申请人： Kiyotaka ICHIYAMA ,  Masahiro Ishida ,  Takahiro Yamaguchi

发明人： Kiyotaka ICHIYAMA ,  Masahiro Ishida ,  Takahiro Yamaguchi

IPC分类号： G06F19/00 ,  G06F17/40

CPC分类号： G01R29/26 ,  G01R31/31709

摘要： There is provided a jitter measurement apparatus for measuring a jitter of a data signal having a substantially constant data rate. The jitter measurement apparatus includes therein a signal converting section that converts the data signal into a clock signal, where the clock signal retains timings of data transition edges of the data signal at which a data value of the data signal transits and has edges whose cycle is substantially equal to the data rate, an analytic signal generating section that converts the clock signal into an analytic signal of a complex number, and a jitter measuring section that measures the jitter of the data signal based on the analytic signal.

摘要翻译： 提供了一种用于测量具有基本上恒定的数据速率的数据信号的抖动的抖动测量装置。 抖动测量装置包括信号转换部分，其将数据信号转换成时钟信号，其中时钟信号保持数据信号的数据值的数据转换边沿的定时，数据信号的数据值在该周期为 基本上等于数据速率，将时钟信号转换为复数分析信号的分析信号生成部分，以及基于分析信号测量数据信号的抖动的抖动测量部分。

公开(公告)号：US20060268970A1

公开(公告)日：2006-11-30

申请号：US11137786

申请日：2005-05-25

申请人： Kiyotaka Ichiyama ,  Masahiro Ishida ,  Takahiro Yamaguchi ,  Mani Soma

发明人： Kiyotaka Ichiyama ,  Masahiro Ishida ,  Takahiro Yamaguchi ,  Mani Soma

IPC分类号： H04B3/46

CPC分类号： G01R31/31709

摘要： There is provided a jitter measuring apparatus for measuring jitter in a signal-under-measurement, including a pulse generating section having first pulse generating means for detecting edges of the data-signal-under-measurement to output a first pulse signal having a pulse width set in advance corresponding to the edge and second pulse generating means for detecting boundaries of data sections where data values do not change in the data-signal-under-measurement to output a second pulse signal having a pulse width set in advance over the edge timings of the boundaries of the detected data sections and a jitter calculating section for calculating timing jitter in the data-signal-under-measurement based on the first and second pulse signals.

公开(公告)号：US20060018418A1

公开(公告)日：2006-01-26

申请号：US10896751

申请日：2004-07-22

申请人： Kiyotaka Ichiyama ,  Masahiro Ishida ,  Takahiro Yamaguchi ,  Mani Soma

发明人： Kiyotaka Ichiyama ,  Masahiro Ishida ,  Takahiro Yamaguchi ,  Mani Soma

IPC分类号： H03D3/24

CPC分类号： G01R31/31709 ,  G01R29/26 ,  G01R31/3016 ,  G01R31/31725 ,  G01R31/3191 ,  G01R31/31937

摘要： A jitter measurement apparatus for measuring an intrinsic jitter of a circuit to be tested including a phase detector which outputs a signal according to a phase difference between a supplied first input signal and a supplied second input signal, includes: an input unit for supplying an identical signal to the phase detector as the first input signal and as the second input signal; and a jitter measurement unit for measuring the intrinsic jitter of the circuit to be tested by measuring a jitter of a signal which is generated in an inside of the circuit to be tested according to an signal output from the phase detector.

公开(公告)号：US08204165B2

公开(公告)日：2012-06-19

申请号：US11616038

申请日：2006-12-26

申请人： Kiyotaka Ichiyama ,  Masahiro Ishida

发明人： Kiyotaka Ichiyama ,  Masahiro Ishida

IPC分类号： H04L7/00

CPC分类号： G01R29/26 ,  G01R31/31709 ,  H04L1/205

摘要： There is provided a jitter measurement apparatus to measure jitter of a signal under measurement. The jitter measurement apparatus includes a pulse generator that outputs a demodulated signal indicating the jitter of the signal under measurement, by outputting a pulse having a substantially constant pulse width in synchronization with each predetermined edge of the signal under measurement, a DC component detecting section that detects a DC component of the demodulated signal output from the pulse generator, and an adjusting section that adjusts the pulse width of the pulse output from the pulse generator, based on the DC component of the demodulated signal which is detected by the DC component detecting section.

摘要翻译： 提供了测量测量信号的抖动的抖动测量装置。 抖动测量装置包括脉冲发生器，通过与测量信号的每个预定边沿同步地输出具有基本上恒定的脉冲宽度的脉冲，输出指示被测信号的抖动的解调信号; DC分量检测部分， 检测从脉冲发生器输出的解调信号的直流分量，以及调整部，其基于由直流成分检测部检测出的解调信号的直流成分，调整从脉冲发生器输出的脉冲的脉冲宽度 。