公开(公告)号：US06763323B2

公开(公告)日：2004-07-13

申请号：US10062563

申请日：2002-02-05

Applicant: Kurt Schmidt

Inventor： Kurt Schmidt

IPC: G01R1324

CPC classification number: H03H17/02 ,  G01R23/173

Abstract: A spectrum analyzer comprises a mixer, which mixes complex conjugate input signal v*(t) into a base band signal x(t) and a resolution filter, which filters the base band signal for narrow band. In accordance with two aspects of the invention, the resolution filter has either a complex pulse response hused(t)=C1·e−C2·t2·e−j·C3·t2 or a real pulse response hused(t)=C4·e−C5·t2, in which C1, C2, C3, C4 and C5 are constants.

Abstract translation: 频谱分析仪包括混合器，其将复共轭输入信号v *（t）混合到基带信号x（t）和分辨率滤波器中，其对窄带的基带信号进行滤波。 根据本发明的两个方面，分辨率滤波器具有复杂脉冲响应（t）= C1.e <-C> <2> << 2 >> e <-jC> <3 （t）= C4.e <-C> <5> << 2 >>，其中C1，C2，C3，C4和 C5是常数。

公开(公告)号：US06316928B1

公开(公告)日：2001-11-13

申请号：US09264754

申请日：1999-03-09

Applicant: Kouji Miyauchi

Inventor： Kouji Miyauchi

IPC: G01R1324

CPC classification number: G01R23/167

Abstract: A spectrum analyzer that incorporates a YTO (YIG tuned oscillator) as a sweep frequency local oscillator and a YTF (YIG tuned filter) as a frequency pre-selector for an incoming signal and improves a C/N (carrier to noise) ratio with low cost. The spectrum analyzer includes a YTO first local oscillator which is swept in response to a ramp signal, a base band block having a first frequency mixer for producing a first intermediate frequency (IF) signal and a second frequency mixer for producing a second IF signal, a high band block having a YTF frequency preselector for selecting frequency components in the input signal in response to the ramp signal and a high band frequency mixer for producing the second IF signal by mixing the input signal through the YTF with the first local signal, and a local signal mode switch for either directly providing the first local signal to the high band frequency mixer or through a frequency divider which divides the frequency of the first local signal by a predetermined division ratio. The YTO has a sweep frequency range which is 1/2 of a sweep frequency range of the YTF, and the division ratio of the frequency divider is two (2).

Abstract translation: 将YTO（YIG调谐振荡器）作为扫频本机振荡器和YTF（YIG调谐滤波器）的频谱分析仪作为输入信号的频率预选器，并将C / N（载噪比）提高到低 成本。 频谱分析仪包括响应于斜坡信号扫描的YTO第一本地振荡器，具有用于产生第一中频（IF）信号的第一混频器的基带块和用于产生第二IF信号的第二混频器， 具有用于响应于斜坡信号选择输入信号中的频率分量的YTF频率预选器的高频带块;以及通过将通过YTF的输入信号与第一本地信号混合来产生第二IF信号的高频带混频器，以及 本地信号模式开关，用于直接向高频频率混频器提供第一本地信号，或者通过分频器将第一本地信号的频率除以预定的分频比。 YTO的扫频频率范围是YTF的扫频范围的1/2，分频器的分频比为2（2）。

公开(公告)号：US06377036B1

公开(公告)日：2002-04-23

申请号：US09167307

申请日：1998-10-06

Applicant: Nobuaki Takeuchi ,  Yoshiki Yanagisawa ,  Jun Kikuchi ,  Yoshio Endou ,  Mitsuru Shinagawa ,  Tadao Nagatsuma ,  Kazuyoshi Matsuhiro

Inventor： Nobuaki Takeuchi ,  Yoshiki Yanagisawa ,  Jun Kikuchi ,  Yoshio Endou ,  Mitsuru Shinagawa ,  Tadao Nagatsuma ,  Kazuyoshi Matsuhiro

IPC: G01R1324

CPC classification number: G01R13/0281

Abstract: The present invention relates to an electro-optic sampling oscilloscope. The delay circuit in the electro-optic sampling oscilloscope comprises a delay time detecting circuit, a regulation time determining circuit, a counter circuit and a delay regulating circuit. The delay time detecting circuit detects in the trigger signal a value corresponding to the delay time of a reference clock from a reference clock generating circuit. The regulation time determining circuit determines a regulation time based on the value detected by the delay time detecting circuit so that the regulation time is an integer multiple of the reference clock. The counter circuit is triggered by the trigger signal to count the reference clock through a specific value. The delay regulating circuit employs a signal related to the regulation time from the regulation time determining circuit, to delay the signal output from the counter circuit by the regulation time.

Abstract translation: 本发明涉及电光采样示波器。 电光采样示波器中的延迟电路包括延迟时间检测电路，调节时间确定电路，计数器电路和延迟调节电路。 延迟时间检测电路在触发信号中检测与来自基准时钟发生电路的参考时钟的延迟时间对应的值。 调节时间确定电路基于由延迟时间检测电路检测的值来确定调节时间，使得调节时间是参考时钟的整数倍。 计数器电路由触发信号触发，通过特定值对参考时钟进行计数。 延迟调节电路采用与调节时间确定电路相关的调节时间的信号，延迟来自计数器电路的信号调节时间。

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。