会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 112. 发明专利
    • Noise characteristic display method
    • 噪声特征显示方法
    • JP2006329839A
    • 2006-12-07
    • JP2005154746
    • 2005-05-26
    • Tektronix Japan Ltd日本テクトロニクス株式会社
    • NARA AKIRA
    • G01R23/16
    • G01R29/26H03L7/16
    • PROBLEM TO BE SOLVED: To measure time-dependent variation of the phase noise characteristic.
      SOLUTION: A peak of a measured spectrum is detected, and its frequency is determined as a reference frequency. The offset frequency from the reference frequency is sequentially changed, noise power is integrated with respect to a predetermined frequency width every frequency to obtain an integrated value, and further a divided value is calculated by dividing it by the predetermined frequency width. The divided value is divided by the peak power, and a noise characteristic representing the ratio of the noise power to the peak power is determined. The relation among an offset frequency, noise characteristic, and period is graphically displayed. Thus, the time-dependent variation of the phase noise characteristic is graphically displayed.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:测量相位噪声特性的时间相关变化。

      解决方案:检测到测量光谱的峰值,并将其频率确定为参考频率。 从基准频率的偏移频率依次变化,噪声功率相对于每个频率的预定频率宽度积分,以获得积分值,并且通过将分频值除以预定频率宽度来计算分频值。 将分频值除以峰值功率,并且确定表示噪声功率与峰值功率之比的噪声特性。 偏移频率,噪声特性和周期之间的关系用图形显示。 因此,图形地显示了相位噪声特性的随时间变化。 版权所有(C)2007,JPO&INPIT

    • 115. 发明专利
    • Noise measurement system and method
    • 噪声测量系统和方法
    • JP2005134398A
    • 2005-05-26
    • JP2004313708
    • 2004-10-28
    • Agilent Technol Incアジレント・テクノロジーズ・インクAgilent Technologies, Inc.
    • TORIN SHIGETSUNEWONG KENNETH HBLACKHAM DAVID V
    • G01R29/26
    • G01R29/26
    • PROBLEM TO BE SOLVED: To provide an accurate noise measurement system independent of a plurality of frequency conversion stages.
      SOLUTION: This noise measurement system 10 measuring noise inside a designated frequency band of an applied signal has: a frequency converter 12 frequency-converting the applied signal by an even-interval separation frequency group to supply a correspondence group of an intermediate frequency signal; a sampler 14 measuring the noise in at least two measurement bands inside each the intermediate frequency signal apart from each other at a frequency interval of an even-interval separation frequency; and a signal processor 16 determining noise power inside the frequency band of the applied signal on the basis of the noise measured by the sampler.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供独立于多个变频级的精确的噪声测量系统。 解决方案:测量所施加的信号的指定频带内的噪声的噪声测量系统10具有:频率转换器12,通过偶数间隔分离频率组对所施加的信号进行频率转换,以提供中频的对应组 信号; 采样器14,以偶数间隔分离频率的频率间隔测量每个中频信号内部的至少两个测量带中的噪声; 以及信号处理器16,基于由采样器测量的噪声来确定所施加的信号的频带内的噪声功率。 版权所有(C)2005,JPO&NCIPI