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1. 发明授权

US07920990B2 Apparatus and methods of defining spectral regions of interest for signal analysis 有权
标题翻译：定义信号分析感兴趣光谱区域的装置和方法
公开(公告)号：US07920990B2
公开(公告)日：2011-04-05
申请号：US12174588
申请日：2008-07-16
申请人： Richard B. Nicholls , John F. Short, III , Walter R. Strand , Lynne A. Fitzsimmons , David W. Schmidt , Ronald J. Larrick
发明人： Richard B. Nicholls , John F. Short, III , Walter R. Strand , Lynne A. Fitzsimmons , David W. Schmidt , Ronald J. Larrick
IPC分类号： G01R23/00 , G06F17/00
CPC分类号： G01R23/16 , G01R1/025
摘要： Apparatus and methods are provided to allow multiple, possibly overlapping, regions of interest within a frequency spectrum to be defined, and managed. Each of these regions of interest may be selected for further testing or identification. Unselected regions are allowed to collapse into narrow bars so as not to interfere with the selected region. Multiple rows are provided to allow for the definition and selection of overlapping regions of interest. Furthermore, in some embodiments aid is provided for identifying the signal type by providing a list of signal type candidates based upon such parameters as region of interest bandwidth, region of interest center frequency and geographic location.
摘要翻译：提供装置和方法以允许定义和管理频谱内的多个可能重叠的感兴趣区域。可以选择这些感兴趣区域中的每一个用于进一步的测试或鉴定。允许未选择的区域折叠成窄条，以便不干扰所选择的区域。提供多个行以允许定义和选择重叠的感兴趣区域。此外，在一些实施例中，通过基于诸如感兴趣区域带宽，感兴趣区域中心频率和地理位置之类的参数提供信号类型候选列表来提供帮助来识别信号类型。

2. 发明申请

US20090209222A1 Conversion Architecture For Residual Spur Avoidance 审中-公开
标题翻译：残余支线避免转换架构
公开(公告)号：US20090209222A1
公开(公告)日：2009-08-20
申请号：US12032537
申请日：2008-02-15
申请人： Litong Li , Donald J. Dalebroux , Ronald J. Larrick
发明人： Litong Li , Donald J. Dalebroux , Ronald J. Larrick
IPC分类号： H04B1/26
CPC分类号： H03D7/161
摘要： A method and apparatus for residual spur avoidance is disclosed. One embodiment comprises a method of generating a first local oscillator signal, mixing the first local oscillator signal with a radio frequency signal to generate an intermediate frequency signal, filtering the intermediate frequency signal at a band-pass frequency, mixing the filtered intermediate frequency signal with a second local oscillator signal having a first frequency offset from the band-pass frequency to generate an output intermediate frequency signal, and switching the second local oscillator signal to a second frequency offset to avoid a spur generated from the first frequency offset, wherein the second frequency offset is the opposite sign but same magnitude offset from the band-pass frequency.
摘要翻译：公开了一种用于残余回波避免的方法和装置。一个实施例包括产生第一本地振荡器信号的方法，将第一本地振荡器信号与射频信号混合以产生中频信号，以带通频率对中频信号进行滤波，将滤波后的中频信号与第二本地振荡器信号具有从带通频率的第一频率偏移以产生输出中频信号，以及将第二本机振荡器信号切换到第二频率偏移以避免从第一频率偏移产生的杂散，其中第二本地振荡器信号频偏是相反的符号，但与带通频率的偏移量相同。

3. 发明授权

US5410282A Wide dynamic range amplifier with error correction 失效
标题翻译：宽动态范围放大器，具有纠错功能
公开(公告)号：US5410282A
公开(公告)日：1995-04-25
申请号：US209767
申请日：1994-03-14
申请人： Ronald J. Larrick , Richard I. Lane
发明人： Ronald J. Larrick , Richard I. Lane
IPC分类号： H03F3/08 , H03F3/50 , H03F1/26
CPC分类号： H03F3/087 , H03F3/505
摘要： An error corrected wide dynamic range amplifier has a transimpedance amplifier where the input signal node is used as a monitoring point for providing an error correction voltage to a combining circuit that also receives the voltage on the output node of the transimpedance amplifier. The combining circuit subtracts the input signal node voltage from the output signal voltage to produce a resultant voltage substantially free of errors produced by non-ideal characteristics of the transimpedance amplifier. The combining circuit may be implemented using analog or digital circuity. The digital combining circuit may also add digital correction values representative of circuit component errors of the wide dynamic range amplifier. Such a wide dynamic range amplifier is usable in high sensitivity, wide dynamic range optical receivers, such as found in optical time domain reflectometers or other optical measurement instruments.
摘要翻译：误差校正宽动态范围放大器具有跨阻放大器，其中输入信号节点用作监测点，用于向组合电路提供误差校正电压，该组合电路也接收跨阻抗放大器的输出节点上的电压。组合电路从输出信号电压中减去输入信号节点电压，以产生基本上没有由跨阻放大器的非理想特性产生的误差的合成电压。组合电路可以使用模拟或数字电路来实现。数字组合电路还可以添加表示宽动态范围放大器的电路组件误差的数字校正值。这种宽动态范围放大器可用于高灵敏度，宽动态范围光接收机，例如在光时域反射计或其他光学测量仪器中。

4. 发明授权

US6124717A Low frequency suppression circuit for a time domain reflectometer 失效
标题翻译：低频抑制电路用于时域反射计
公开(公告)号：US6124717A
公开(公告)日：2000-09-26
申请号：US32435
申请日：1998-02-27
申请人： Edgar T. Guenther, Jr. , Ronald J. Larrick
发明人： Edgar T. Guenther, Jr. , Ronald J. Larrick
IPC分类号： G01R31/11 , G01R27/04
CPC分类号： G01R31/11
摘要： An improved time domain reflectometer (TDR) includes a capacitor coupled in series between a transmission medium under test and the TDR receiver input. A switch, operating under microprocessor control, selectively couples and uncouples the capacitor to a voltage reference, such as ground. During the generation of interrogating pulses from the TDR and the acquisition of data from the transmission medium under test, the capacitor is uncoupled from the voltage reference and acts as a DC blocking capacitor. During periods of non-TDR activity, the capacitor is coupled to voltage reference and acts as a load for low frequency interference appearing on the transmission medium. The capacitor-switch operation blocks low frequency interference signals from the receiver input of the TDR.
摘要翻译：改进的时域反射计（TDR）包括在被测传输介质和TDR接收机输入之间串联耦合的电容器。在微处理器控制下运行的开关选择性地将电容器耦合到电压参考，例如接地。在从TDR产生询问脉冲和从被测传输介质采集数据时，电容器与参考电压分离，并充当直流阻塞电容器。在非TDR活动期间，电容器耦合到电压基准，并且作为出现在传输介质上的低频干扰的负载。电容开关操作阻止来自TDR的接收器输入端的低频干扰信号。

5. 发明申请

US20090125259A1 APPARATUS AND METHODS OF DEFINING SPECTRAL REGIONS OF INTEREST FOR SIGNAL ANALYSIS 有权
标题翻译：定义信号分析频谱区域的装置和方法
公开(公告)号：US20090125259A1
公开(公告)日：2009-05-14
申请号：US12174588
申请日：2008-07-16
申请人： RICHARD B. NICHOLLS , JOHN F. SHORT, III , WALTER R. STRAND , LYNNE A. FITZSIMMONS , DAVID W. SCHMIDT , RONALD J. LARRICK
发明人： RICHARD B. NICHOLLS , JOHN F. SHORT, III , WALTER R. STRAND , LYNNE A. FITZSIMMONS , DAVID W. SCHMIDT , RONALD J. LARRICK
IPC分类号： G01R23/16 , G06F19/00 , G01R15/08 , G08B21/00
CPC分类号： G01R23/16 , G01R1/025
摘要： Apparatus and methods are provided to allow multiple, possibly overlapping, regions of interest within a frequency spectrum to be defined, and managed. Each of these regions of interest may be selected for further testing or identification. Unselected regions are allowed to collapse into narrow bars so as not to interfere with the selected region. Multiple rows are provided to allow for the definition and selection of overlapping regions of interest. Furthermore, in some embodiments aid is provided for identifying the signal type by providing a list of signal type candidates based upon such parameters as region of interest bandwidth, region of interest center frequency and geographic location.
摘要翻译：提供装置和方法以允许定义和管理频谱内的多个可能重叠的感兴趣区域。可以选择这些感兴趣区域中的每一个用于进一步的测试或鉴定。允许未选择的区域折叠成窄条，以便不干扰所选择的区域。提供多个行以允许定义和选择重叠的感兴趣区域。此外，在一些实施例中，通过基于诸如感兴趣区域带宽，感兴趣区域中心频率和地理位置之类的参数提供信号类型候选列表来提供帮助来识别信号类型。

6. 发明授权

US06263047B1 Apparatus and method for characterizing the loading pattern of a telecommunications transmission line 有权
标题翻译：用于表征电信传输线路的加载模式的装置和方法
公开(公告)号：US06263047B1
公开(公告)日：2001-07-17
申请号：US09392669
申请日：1999-09-07
申请人： William C. Randle , Ronald J. Larrick , Phillip F. Kochan
发明人： William C. Randle , Ronald J. Larrick , Phillip F. Kochan
IPC分类号： H04M308
CPC分类号： H04M3/08 , H04M3/28
摘要： An apparatus and method for characterizing a loading pattern of a twisted pair telecommunications transmission line includes a variable frequency signal generator and a measurement receiver connected to the twisted pair line. The signal generator applies a variable frequency signal to the twisted pair line and the measurement receiver acquires magnitude values representative of the impedance of the twisted pair line. A controller, operating under program control, models a plurality of baseline transmission line and twisted pair lines to generate magnitude values representative of the models. Error values are generated between the acquired magnitude values and the modeled magnitude values. The error values are compared to each other to determine the model with the minimum error value which is used as the model for charactering the twisted pair transmission line.
摘要翻译：用于表征双绞线电信传输线的加载模式的装置和方法包括可变频率信号发生器和连接到双绞线的测量接收器。信号发生器向双绞线施加可变频率信号，并且测量接收器获取代表双绞线线路阻抗的幅值。在程序控制下操作的控制器对多条基线传输线和双绞线进行建模，以产生代表模型的幅值。在所获取的幅度值和建模的幅度值之间产生误差值。将误差值相互比较，以确定具有最小误差值的模型，该最小误差值用作用于表征双绞线传输线的模型。

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