公开(公告)号：US20120161800A1

公开(公告)日：2012-06-28

申请号：US13165796

申请日：2011-06-22

申请人： Masahiro ISHIDA ,  Kiyotaka ICHIYAMA

发明人： Masahiro ISHIDA ,  Kiyotaka ICHIYAMA

IPC分类号： G01R31/00 ,  H03L7/00

CPC分类号： G01R31/31932 ,  G01R31/31703 ,  G01R31/31924

摘要： Provided is a measurement circuit that measures a signal under measurement input thereto, comprising a level comparing section that outputs a logic value according to a comparison result between a signal level of the signal under measurement and a set threshold level; a logic comparing section that acquires the logic value output by the level comparing section at a comparison timing input thereto; and a timing adjusting section that adjusts relative phases of a signal output by the level comparing section and the comparison timing, based on the expected value pattern of the signal under measurement and the threshold level.

摘要翻译： 提供一种测量输入信号的测量电路，包括：电平比较部分，根据测量信号的信号电平与设定的阈值电平之间的比较结果输出逻辑值; 逻辑比较部，其在输入的比较定时获取由所述电平比较部输出的逻辑值; 以及定时调整部，其基于所测量的信号的期望值模式和阈值水平，调整由所述电平比较部输出的信号和所述比较定时的相对相位。

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：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：US20100321001A1

公开(公告)日：2010-12-23

申请号：US12753796

申请日：2010-04-02

申请人： Kiyotaka ICHIYAMA

发明人： Kiyotaka ICHIYAMA

IPC分类号： G01R25/00 ,  H03D13/00

CPC分类号： G01R31/2882

摘要： Provided is a phase detecting apparatus that detects a phase difference between signals, comprising a phase comparing section that sequentially delays a second input signal relative to a first input signal, according to a set value, and that compares a phase of the second input signal to a phase of the first input signal each time a relative phase between the input signals changes; and a delay adjusting section that adjusts in advance a delay amount of a signal in the phase comparing section. The delay adjusting section includes a signal generating section that generates a first adjustment signal and a second adjustment signal, which has a period that is shorter than a period of the first adjustment signal by an amount corresponding to the set value, and inputs the first adjustment signal and the second adjustment signal to the phase comparing section as the first input signal and the second input signal, respectively; and an adjusting section that adjusts a delay amount of the phase in the phase comparing section based on the phase comparison result by the phase comparing section between the first adjustment signal and the second adjustment signal.

摘要翻译： 提供了一种相位检测装置，其检测信号之间的相位差，包括相位比较部分，其根据设定值顺序地延迟第二输入信号，并将第二输入信号的相位与 每当输入信号之间的相对相位发生变化时，第一输入信号的相位; 以及延迟调整部，预先调整相位比较部中的信号的延迟量。 延迟调整部分包括：信号产生部分，其生成第一调整信号和第二调整信号，该信号具有比第一调整信号的周期短的周期与设定值相对应的周期，并且输入第一调整 信号和第二调整信号分别作为第一输入信号和第二输入信号输出到相位比较部分; 以及调整部，其基于相位比较部在第一调整信号和第二调整信号之间的相位比较结果来调整相位比较部中的相位的延迟量。