公开(公告)号：US20060100801A1

公开(公告)日：2006-05-11

申请号：US10984547

申请日：2004-11-09

申请人： Sassan Tabatabaei ,  Michael Lee ,  Mordechai Ben-Zeev

发明人： Sassan Tabatabaei ,  Michael Lee ,  Mordechai Ben-Zeev

IPC分类号： G06F19/00

CPC分类号： G01R31/31709

摘要： A system and related method for generating a test signal with controllable amounts of signal jitter includes a pattern generator, a programmable arbitrary waveform generator (AWG) and a phase modulator. The pattern generator is configured to generate a data signal characterized by a given data pattern, bit rate and pattern length. A trigger signal representative of initial timing information associated with the data signal is provided to the AWG which subsequently generates a modulation signal with a frequency equal to the bit rate divided by the pattern length of the data signal. This modulation signal is provided to the phase modulator, along with a reference clock signal, and the phase modulator generates a modulated clock signal controlled by a phase modulation means (e.g., a controllable delay line) fed by the modulation signal. The resultant jittery clock signal is then provided to the pattern generator to adjust the timing of the data signal and to generate a signal representative of a data signal with data-dependent jitter characteristics. Additional inputs to the delay line of the pulse generator may include a random Gaussian noise signal for providing random jitter and a periodic signal for providing periodic jitter.

摘要翻译： 用于产生具有可控量的信号抖动的测试信号的系统和相关方法包括模式发生器，可编程任意波形发生器（AWG）和相位调制器。 图案生成器被配置为生成以给定数据模式，比特率和模式长度为特征的数据信号。 表示与数据信号相关联的初始定时信息的触发信号被提供给AWG，随后产生具有等于比特率除以数据信号的模式长度的频率的调制信号。 该调制信号与参考时钟信号一起提供给相位调制器，并且相位调制器产生由调制信号馈送的相位调制装置（例如，可控延迟线）控制的调制时钟信号。 然后将所得到的抖动时钟信号提供给模式发生器以调整数据信号的定时，并产生表示具有数据相关抖动特性的数据信号的信号。 脉冲发生器的延迟线的附加输入可以包括用于提供随机抖动的随机高斯噪声信号和用于提供周期性抖动的周期性信号。

公开(公告)号：US07239969B2

公开(公告)日：2007-07-03

申请号：US10984547

申请日：2004-11-09

申请人： Sassan Tabatabaei ,  Michael Lee ,  Mordechai Ben-Zeev

发明人： Sassan Tabatabaei ,  Michael Lee ,  Mordechai Ben-Zeev

IPC分类号： G01R29/26

CPC分类号： G01R31/31709

摘要： A system and related method for generating a test signal with controllable amounts of signal jitter includes a pattern generator, a programmable arbitrary waveform generator (AWG) and a phase modulator. The pattern generator is configured to generate a data signal characterized by a given data pattern, bit rate and pattern length. A trigger signal representative of initial timing information associated with the data signal is provided to the AWG which subsequently generates a modulation signal with a frequency equal to the bit rate divided by the pattern length of the data signal. This modulation signal is provided to the phase modulator, along with a reference clock signal, and the phase modulator generates a modulated clock signal controlled by a phase modulation means (e.g., a controllable delay line) fed by the modulation signal. The resultant jittery clock signal is then provided to the pattern generator to adjust the timing of the data signal and to generate a signal representative of a data signal with data-dependent jitter characteristics. Additional inputs to the delay line of the pulse generator may include a random Gaussian noise signal for providing random jitter and a periodic signal for providing periodic jitter.

摘要翻译： 用于产生具有可控量的信号抖动的测试信号的系统和相关方法包括模式发生器，可编程任意波形发生器（AWG）和相位调制器。 图案生成器被配置为生成以给定数据模式，比特率和模式长度为特征的数据信号。 表示与数据信号相关联的初始定时信息的触发信号被提供给AWG，随后产生具有等于比特率除以数据信号的模式长度的频率的调制信号。 该调制信号与参考时钟信号一起提供给相位调制器，并且相位调制器产生由调制信号馈送的相位调制装置（例如，可控延迟线）控制的调制时钟信号。 然后将所得到的抖动时钟信号提供给模式发生器以调整数据信号的定时，并产生表示具有数据相关抖动特性的数据信号的信号。 脉冲发生器的延迟线的附加输入可以包括用于提供随机抖动的随机高斯噪声信号和用于提供周期性抖动的周期性信号。

公开(公告)号：US20060047450A1

公开(公告)日：2006-03-02

申请号：US10930683

申请日：2004-08-31

申请人： Sassan Tabatabaei ,  Mordechai Ben-Zeev ,  Paul Miller

发明人： Sassan Tabatabaei ,  Mordechai Ben-Zeev ,  Paul Miller

IPC分类号： G06F19/00

CPC分类号： G01R31/31709

摘要： Methods for estimating data-dependent jitter (DDJ) from measured samples of a transmitted data signal include a first exemplary step of obtaining a plurality of measurements (e.g., time tags and event counts for selected pulse widths in the data signal). Such measurements may be obtained at predetermined intervals within a transmitted signal or may be obtained at randomly selected intervals, and should yield measurements for each data pulse in a repeating data pattern. An average unit interval value representative of the average bit time of the transmitted signal is determined. Time interval error estimates representative of the timing deviation from each signal edge's measured value relative to its ideal value (determined in part from the calculated average unit interval value) are also determined, as well as a classification for each measured signal edge relative to a corresponding data pulse in the repeating data pattern. DDJ delta lines are then calculated for signal edges of each pulse width in the transmitted data pattern, from which peak-to-peak DDJ values and/or estimates of duty-cycle-distortion (DCD) can be determined.

摘要翻译： 用于从发送的数据信号的测量样本估计数据相关抖动（DDJ）的方法包括获得多个测量（例如，数据信号中所选择的脉冲宽度的时间标签和事件计数）的第一示例性步骤。 这样的测量可以以发送信号内的预定间隔获得，或者可以以随机选择的间隔获得，并且应该产生重复数据模式中每个数据脉冲的测量。 确定表示发送信号的平均位时间的平均单位间隔值。 时间间隔误差估计代表每个信号边缘的测量值相对于其理想值的时间偏差（由计算出的平均单位间隔值部分确定），以及相对于相应的每个测量信号边缘的分类 重复数据模式中的数据脉冲。 然后针对发送数据模式中的每个脉冲宽度的信号边缘计算DDJ delta线，从而可以确定峰 - 峰DDJ值和/或占空比失真（DCD）的估计。

公开(公告)号：US07203610B2

公开(公告)日：2007-04-10

申请号：US10930683

申请日：2004-08-31

申请人： Sassan Tabatabaei ,  Mordechai Ben-Zeev ,  Paul Frederick Miller

发明人： Sassan Tabatabaei ,  Mordechai Ben-Zeev ,  Paul Frederick Miller

IPC分类号： G01R13/00 ,  G01R25/00

CPC分类号： G01R31/31709

摘要： Methods for estimating data-dependent jitter (DDJ) from measured samples of a transmitted data signal include a first exemplary step of obtaining a plurality of measurements (e.g., time tags and event counts for selected pulse widths in the data signal). Such measurements may be obtained at predetermined intervals within a transmitted signal or may be obtained at randomly selected intervals, and should yield measurements for each data pulse in a repeating data pattern. An average unit interval value representative of the average bit time of the transmitted signal is determined. Time interval error estimates representative of the timing deviation from each signal edge's measured value relative to its ideal value (determined in part from the calculated average unit interval value) are also determined, as well as a classification for each measured signal edge relative to a corresponding data pulse in the repeating data pattern. DDJ delta lines are then calculated for signal edges of each pulse width in the transmitted data pattern, from which peak-to-peak DDJ values and/or estimates of duty-cycle-distortion (DCD) can be determined.

摘要翻译： 用于从发送的数据信号的测量样本估计数据相关抖动（DDJ）的方法包括获得多个测量（例如，数据信号中所选择的脉冲宽度的时间标签和事件计数）的第一示例性步骤。 这样的测量可以以发送信号内的预定间隔获得，或者可以以随机选择的间隔获得，并且应该产生重复数据模式中每个数据脉冲的测量。 确定表示发送信号的平均位时间的平均单位间隔值。 时间间隔误差估计代表每个信号边缘的测量值相对于其理想值的时间偏差（由计算出的平均单位间隔值部分确定），以及相对于相应的每个测量信号边缘的分类 重复数据模式中的数据脉冲。 然后针对发送数据模式中的每个脉冲宽度的信号边缘计算DDJ delta线，从而可以确定峰 - 峰DDJ值和/或占空比失真（DCD）的估计。