公开(公告)号：US07636387B2

公开(公告)日：2009-12-22

申请号：US10776926

申请日：2004-02-11

Applicant: Takahiro Yamaguchi ,  Masahiro Ishida ,  Mani Soma ,  Hirobumi Musha

Inventor： Takahiro Yamaguchi ,  Masahiro Ishida ,  Mani Soma ,  Hirobumi Musha

IPC: H04B3/46

CPC classification number: G01R31/3171 ,  G01R29/26 ,  G01R31/31709 ,  G01R31/31725 ,  G01R31/31922 ,  G01R31/31937 ,  H04L1/205

Abstract: A measuring apparatus including a timing jitter estimator which estimates an output timing jitter sequence which indicates the output timing jitter of an output signal based on an output signal output from a DUT in response to an input signal input to the DUT, and a jitter transfer function estimator which estimates a jitter transfer function in the DUT based on the output timing jitter sequence. The jitter transfer function estimator includes an instantaneous phase noise estimator which estimates an instant phase noise of the output signal based on an output signal, and a resampler which generates the output timing jitter sequence by resampling the instantaneous phase noise at predetermined timing.

Abstract translation: 一种测量装置，包括定时抖动估计器，其响应于输入到DUT的输入信号，估计基于从DUT输出的输出信号来输出输出信号的输出定时抖动的输出定时抖动序列，以及抖动传递函数 估计器，其基于输出定时抖动序列来估计DUT中的抖动传递函数。 抖动传递函数估计器包括：基于输出信号估计输出信号的瞬时相位噪声的瞬时相位噪声估计器;以及通过在预定定时重采样瞬时相位噪声来产生输出定时抖动序列的重采样器。

公开(公告)号：US06265861B1

公开(公告)日：2001-07-24

申请号：US09482761

申请日：2000-01-13

Applicant: Hirobumi Musha

Inventor： Hirobumi Musha

IPC: G01R1324

CPC classification number: G01R23/173

Abstract: A frequency spectrum analyzer having an improved carrier to noise ration for analyzing frequency spectrum of an input signal. The spectrum analyzer includes a first frequency converter formed of a first frequency mixer, a first IF (intermediate frequency) filter and a first local signal oscillator; a second frequency converter; a third frequency converter formed of a third frequency mixer, a third IF filter and a third local signal oscillator; a frequency divider for diving a frequency of the first local signal by a factor of N; a frequency multiplier for multiplying a frequency of the third local signal; a fourth frequency mixer which is provided with a divided frequency signal from the frequency divider as a fourth local signal; and a fifth frequency mixer which mixes the input signal to be analyzed and a multiplied frequency signal from the frequency multiplier as a fifth local signal and provides a frequency converted input signal to the fourth frequency mixer; where the fourth frequency mixer mixes the fourth local signal and the frequency converted input signal and provides a resultant IF signal to the third frequency converter.

Abstract translation: 一种频谱分析仪，具有改进的载波噪声比，用于分析输入信号的频谱。 频谱分析仪包括由第一混频器，第一IF（中频）滤波器和第一本地信号振荡器形成的第一频率转换器; 第二变频器; 由第三混频器，第三IF滤波器和第三本地信号振荡器形成的第三频率转换器; 分频器，用于将第一局部信号的频率下降N倍; 用于乘以第三局部信号的频率的倍频器; 第四混频器，其具有来自分频器的分频信号作为第四本地信号; 以及第五混频器，其将要分析的输入信号和来自倍频器的乘法频率信号作为第五本地信号混合，并将变频输入信号提供给第四混频器; 其中第四混频器混合第四本地信号和频率转换的输入信号，并将合成的IF信号提供给第三变频器。

公开(公告)号：US6166533A

公开(公告)日：2000-12-26

申请号：US170301

申请日：1998-10-13

Applicant: Hirobumi Musha

Inventor： Hirobumi Musha

IPC: G01R23/173 ,  G01R13/24

CPC classification number: G01R23/173

Abstract: A frequency spectrum analyzer having an improved carrier to noise ration for analyzing frequency spectrum of an input signal. The spectrum analyzer includes a first frequency converter formed of a first frequency mixer, a first IF (intermediate frequency) filter and a first local signal oscillator; a second frequency converter; a third frequency converter formed of a third frequency mixer, a third IF filter and a third local signal oscillator; a frequency divider for dividing a frequency of the first local signal by a factor of N; a frequency multiplier for multiplying a frequency of the third local signal; a fourth frequency mixer which is provided with a divided frequency signal from the frequency divider as a fourth local signal; and a fifth frequency mixer which mixes the input signal to be analyzed and a multiplied frequency signal from the frequency multiplier as a fifth local signal and provides a frequency converted input signal to the fourth frequency mixer; where the fourth frequency mixer mixes the fourth local signal and the frequency converted input signal and provides a resultant IF signal to the third frequency converter.

Abstract translation: 一种频谱分析仪，具有改进的载波噪声比，用于分析输入信号的频谱。 频谱分析仪包括由第一混频器，第一IF（中频）滤波器和第一本地信号振荡器形成的第一频率转换器; 第二变频器; 由第三混频器，第三IF滤波器和第三本地信号振荡器形成的第三频率转换器; 用于将第一局部信号的频率除以因子N的分频器; 用于乘以第三局部信号的频率的倍频器; 第四混频器，其具有来自分频器的分频信号作为第四本地信号; 以及第五混频器，其将要分析的输入信号和来自倍频器的乘法频率信号作为第五本地信号混合，并将变频输入信号提供给第四混频器; 其中第四混频器混合第四本地信号和频率转换的输入信号，并将合成的IF信号提供给第三变频器。

公开(公告)号：US07054358B2

公开(公告)日：2006-05-30

申请号：US10134298

申请日：2002-04-29

Applicant: Takahiro Yamaguchi ,  Masahiro Ishida ,  Hirobumi Musha ,  Mani Soma

Inventor： Takahiro Yamaguchi ,  Masahiro Ishida ,  Hirobumi Musha ,  Mani Soma

IPC: H04B17/00 ,  H04L25/00

CPC classification number: G01R31/31709 ,  G01R29/26

Abstract: A measuring apparatus is provided that includes: a timing jitter calculator for calculating the first timing jitter sequence of the first signal and the second timing jitter sequence of the second signal; and a jitter transfer function estimator for calculating a jitter transfer function between the first and second signals based on frequency components of the first and second timing jitter sequences. The jitter transfer function estimator calculates the jitter transfer function, for a plurality of frequency component pairs each of which is formed by a frequency component of a timing jitter in the first timing jitter sequence and a frequency component of a timing jitter in the second timing jitter sequence which correspond to approximately equal frequencies, based on frequency component ratios of the timing jitters in the first and second timing jitter sequences.

公开(公告)号：US20050031029A1

公开(公告)日：2005-02-10

申请号：US10776926

申请日：2004-02-11

Applicant: Takahiro Yamaguchi ,  Masahiro Ishida ,  Mani Soma ,  Hirobumi Musha

Inventor： Takahiro Yamaguchi ,  Masahiro Ishida ,  Mani Soma ,  Hirobumi Musha

IPC: G01R29/26 ,  G01R31/317 ,  G01R31/319 ,  G01R31/3193 ,  H04L1/20 ,  H04B3/46

CPC classification number: G01R31/3171 ,  G01R29/26 ,  G01R31/31709 ,  G01R31/31725 ,  G01R31/31922 ,  G01R31/31937 ,  H04L1/205

Abstract: A measuring apparatus including a timing jitter estimator which estimates an output timing jitter sequence which indicates the output timing jitter of an output signal based on an output signal output from a DUT in response to an input signal input to the DUT, and a jitter transfer function estimator which estimates a jitter transfer function in the DUT based on the output timing jitter sequence. The jitter transfer function estimator includes an instantaneous phase noise estimator which estimates an instant phase noise of the output signal based on an output signal, and a resampler which generates the output timing jitter sequence by resampling the instantaneous phase noise at predetermined timing.

Abstract translation: 一种测量装置，包括定时抖动估计器，其响应于输入到DUT的输入信号，估计基于从DUT输出的输出信号来输出输出信号的输出定时抖动的输出定时抖动序列，以及抖动传递函数 估计器，其基于输出定时抖动序列来估计DUT中的抖动传递函数。 抖动传递函数估计器包括：基于输出信号估计输出信号的瞬时相位噪声的瞬时相位噪声估计器;以及通过在预定定时重采样瞬时相位噪声来产生输出定时抖动序列的重采样器。