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1. 发明授权

US06556239B1 Distortion monitoring system for CATV transmission networks 有权
标题翻译： CATV传输网络失真监控系统
公开(公告)号：US06556239B1
公开(公告)日：2003-04-29
申请号：US09545650
申请日：2000-04-10
申请人： Saleh R. Al-Araji , Paul E. Quesenberry , Herman A. Kruse
发明人： Saleh R. Al-Araji , Paul E. Quesenberry , Herman A. Kruse
IPC分类号： H04N1700
CPC分类号： H04N17/00 , H04N7/10
摘要： Systems and methods for a distortion monitoring system that detects an abnormal amount of signal distortion occurring in a transmission system. The distortion monitoring system includes a system amplifier section for amplifying and coupling an input signal to provide first and second outputs and a distortion monitoring section for processing the second output. The amount of distortion present is represented by an output from the distortion monitoring section of the system. In one embodiment, the distortion monitoring section can include an envelope detector for receiving the second output signal, a lowpass filter coupled to the envelope detector for cutting off frequencies below the Nyquist rate, and a voltage amplifier coupled to the lowpass filter for amplifying the signal. An analog to digital converter coupled to the voltage amplifier digitizes the signal, a memory buffer coupled to the analog to digital converter captures the digital data from the analog to digital converter, and a digital signal processor extracts the converted signal. In yet another embodiment, the digital signal processor includes an on-chip memory. A status monitor coupled to the output of the distortion monitoring section provides for monitoring the output signal.
摘要翻译：用于检测在传输系统中发生的异常信号失真量的失真监视系统的系统和方法。失真监测系统包括用于放大和耦合输入信号以提供第一和第二输出的系统放大器部分和用于处理第二输出的失真监测部分。存在的失真量由系统的失真监视部分的输出表示。在一个实施例中，失真监测部分可以包括用于接收第二输出信号的包络检测器，耦合到包络检测器的低通滤波器，用于切断低于奈奎斯特速率的频率，以及耦合到低通滤波器的放大信号的电压放大器。耦合到电压放大器的模数转换器对信号进行数字化，耦合到模数转换器的存储器缓冲器捕获来自模数转换器的数字数据，并且数字信号处理器提取转换的信号。在另一个实施例中，数字信号处理器包括片上存储器。耦合到失真监视部分的输出的状态监视器提供监视输出信号。

2. 发明授权

US06559756B2 Ingress monitoring device in a broadband communications system 有权
标题翻译：宽带通信系统中的入口监控设备
公开(公告)号：US06559756B2
公开(公告)日：2003-05-06
申请号：US09880455
申请日：2001-06-13
申请人： Saleh R. Al-Araji , Paul E. Quesenberry
发明人： Saleh R. Al-Araji , Paul E. Quesenberry
IPC分类号： G08B900
CPC分类号： H04L43/00 , H04L12/2801 , H04L43/0817
摘要： An ingress monitoring device (400) for monitoring and detecting reverse signals that may include ingress signals. The ingress monitoring device (400) includes a processor (430) for resolving the reverse signals into predetermined sub-bands at a first resolution. A power computation circuit (435) computes a power level for each of the sub-bands. A threshold comparison circuit (445) then compares the power level that is indicative to the power level of the ingress signals for each of the sub-bands with a predetermined threshold value. When ingress signals are detected by the ingress monitoring device (400), an alarm signal is sent that indicates the specific communications equipment in which the ingress signals have been detected.
摘要翻译：一种用于监测和检测可能包括入口信号的反向信号的入口监视设备（400）。入口监视设备（400）包括用于以第一分辨率将反向信号解析成预定子带的处理器（430）。功率计算电路（435）计算每个子带的功率电平。阈值比较电路（445）然后将指示每个子带的入口信号的功率电平的功率电平与预定阈值进行比较。当入口监视装置（400）检测到入口信号时，发送指示已经检测到入口信号的特定通信设备的报警信号。

3. 发明授权

US07095960B2 Spurious free dynamic range in optical communications systems 有权
标题翻译：光通信系统中的无杂散动态范围
公开(公告)号：US07095960B2
公开(公告)日：2006-08-22
申请号：US10213658
申请日：2002-08-06
申请人： Paul E. Quesenberry , Saleh R. Al-Araji , Edward W. Brumley, Jr.
发明人： Paul E. Quesenberry , Saleh R. Al-Araji , Edward W. Brumley, Jr.
IPC分类号： H04B10/00
CPC分类号： H04B10/504 , H04B10/2575 , H04B10/58
摘要： The present invention is directed towards an optical transmitter including a noise generator. The noise generator provides noise signals that are filtered to below a frequency spectrum. The filtered noise signals are combined with RF signals to provide continuous modulation of a laser. The combined signals are converted to optical signals by the laser and transmitted over an optical link.
摘要翻译：本发明涉及一种包括噪声发生器的光发射机。噪声发生器提供被滤波到低于频谱的噪声信号。滤波的噪声信号与RF信号组合以提供激光的连续调制。组合的信号由激光器转换成光信号并通过光链路传输。

4. 发明授权

US6091441A Radio frequency detector for cable television distribution systems 失效
标题翻译：射频检测器用于有线电视分配系统
公开(公告)号：US6091441A
公开(公告)日：2000-07-18
申请号：US21086
申请日：1998-02-10
申请人： Saleh R. Al-Araji , James F. Blair , Herman A. Kruse
发明人： Saleh R. Al-Araji , James F. Blair , Herman A. Kruse
IPC分类号： H04N7/10 , H04N17/00 , H04N5/14
CPC分类号： H04N7/102
摘要： A distribution amplifier (210) for a cable television system (100) includes an output gain stage section (215) for receiving an input signal from a cable head end section (105). The output gain stage section (215) includes multiple active amplifier circuits (225, 230) for amplifying the input signal to generate main and auxiliary outputs that are processed by a radio frequency (RF) detector (255) having at least a first detector circuit (300) for processing the main output to generate a first voltage and a second detector circuit (305) for processing the auxiliary output to generate a second voltage. Further included in the distribution amplifier (210) is a status monitor (260) coupled to the RF detector (255) for converting the first and second outputs to first and second digital values and transmitting the first and second digital values. In this manner, an indication of a system or amplifier malfunction can be provided. Other advantages of the RF detector (255) are that the main and auxiliary outputs can be either simultaneously or sequentially processed, as desired, to provide multiple indications of system problems and that the RF stages of the detector circuits (300,305) are connected in series to reduce current drain, thereby reducing power consumption. Additionally, the RF detector (255) includes a differential amplifier stage (325) that compensates for temperature variations introduced by the diode etector stage (320) to provide a thermally stable RF detector (255).
摘要翻译：用于有线电视系统（100）的分配放大器（210）包括用于从电缆头端部分（105）接收输入信号的输出增益级部分（215）。输出增益级部分（215）包括多个有源放大器电路（225,230），用于放大输入信号以产生由具有至少第一检测器电路的射频（RF）检测器（255）处理的主输出和辅助输出（300），用于处理主输出以产生第一电压和第二检测器电路（305），用于处理辅助输出以产生第二电压。还包括在分配放大器（210）中的状态监视器（260）耦合到RF检测器（255），用于将第一和第二输出转换为第一和第二数字值并传输第一和第二数字值。以这种方式，可以提供系统或放大器故障的指示。 RF检测器（255）的其它优点是主要和辅助输出可以根据需要同时或顺序处理，以提供系统问题的多个指示，并且检测器电路（300,305）的RF级串联连接以减少电流消耗，从而降低功耗。另外，RF检测器（255）包括差分放大器级（325），其补偿由二极管检测器级（320）引入的温度变化以提供热稳定的RF检测器（255）。

5. 发明授权

US6097250A Amplifier circuit 有权
标题翻译：放大器电路
公开(公告)号：US6097250A
公开(公告)日：2000-08-01
申请号：US296978
申请日：1999-04-22
申请人： Walid Kamali , Saleh R. Al-Araji
发明人： Walid Kamali , Saleh R. Al-Araji
IPC分类号： H03F3/60 , H03F3/68
CPC分类号： H03F3/604
摘要： An amplifier circuit (400) includes an input port (402) for receiving a signal and a first balun (404) for splitting the signal into first and second signals. First and second amplifiers (406, 408) are coupled to outputs of the first balun (404) for respectively amplifying the outputs of the first balun (404) to generate first and second amplified signals. Second and third baluns (410, 412) are coupled, respectively, to outputs of the first and second amplifiers (406, 408) for splitting, respectively, each of the first and second amplified signals into in-phase and out-of-phase components. The amplifier circuit (400) also includes third and fourth amplifiers (414, 416) coupled to outputs of the second balun (410) for respectively amplifying the outputs of the second balun (410) to generate third and fourth amplified signals and fifth and sixth amplifiers (418, 420) coupled to outputs of the third balun (412) for respectively amplifying the outputs of the third balun (412) to generate fifth and sixth amplified signals. A fourth balun (422) combines the third and fourth amplified signals into a first combined signal, and a fifth balun (424) combines the fifth and sixth amplified signals into a second combined signal. The amplifier circuit (400) further includes a combiner, such as an additional balun (326) or a summer (430), for combining the first and second combined signals to generate an amplifier output signal.
摘要翻译：放大器电路（400）包括用于接收信号的输入端口（402）和用于将信号分成第一和第二信号的第一平衡 - 不平衡变换器（404）。第一和第二放大器（406,408）耦合到第一平衡 - 不平衡变换器（404）的输出端，用于分别放大第一平衡 - 不平衡变换器（404）的输出以产生第一和第二放大信号。第二和第三平衡不平衡变压器（410,412）分别耦合到第一和第二放大器（406,408）的输出，用于将第一和第二放大信号中的每一个分别分为同相和异相组件。放大器电路（400）还包括耦合到第二平衡 - 不平衡变换器（410）的输出的第三和第四放大器（414,416），用于分别放大第二平衡 - 不平衡变换器（410）的输出以产生第三和第四放大信号，第五和第六放大器（418,420）耦合到第三平衡 - 不平衡变换器（412）的输出端，用于分别放大第三平衡 - 不平衡变换器（412）的输出以产生第五和第六放大信号。第四平衡 - 不平衡变换器（422）将第三和第四放大信号组合成第一组合信号，第五平衡 - 不平衡变换器（424）将第五和第六放大信号组合成第二组合信号。放大器电路（400）还包括组合器，诸如附加平衡 - 不平衡变换器（326）或加法器（430），用于组合第一和第二组合信号以产生放大器输出信号。

6. 发明授权

US07099588B2 Laser modulation control to improve system dynamic range 有权
标题翻译：激光调制控制，提高系统动态范围
公开(公告)号：US07099588B2
公开(公告)日：2006-08-29
申请号：US10213632
申请日：2002-08-06
申请人： Saleh R. Al-Araji , John Skrobko
发明人： Saleh R. Al-Araji , John Skrobko
IPC分类号： H04B10/00
CPC分类号： H04B10/504 , H04B10/2575 , H04B10/58
摘要： The present invention provides several embodiments of a video carrier signal detection circuit included in an optical transmitter for either disabling an oscillator that provides dithering tones or attenuating the power level of the dither tones. A first detection circuit detects the presence of a video carrier signal by analyzing a known video channel. The power level of a video sync pulse included in the known video channel is then compared to a reference power level. A second detection circuit compares the composite power level of the RF signals in a predetenmined frequency spectrum with a reference power level to determine either the presence of a video carrier signal or an increase in the channel loading. Upon detection of a video carrier signal or an increase in composite power, an enable signal is provided to either the oscillator or an attenuating device depending upon the detection circuit.
摘要翻译：本发明提供了包括在光发射机中的视频载波信号检测电路的几个实施例，用于禁用提供抖动音或者衰减抖动音的功率电平的振荡器。第一检测电路通过分析已知的视频信道来检测视频载波信号的存在。然后将包括在已知视频通道中的视频同步脉冲的功率电平与参考功率电平进行比较。第二检测电路将预定频谱中的RF信号的复合功率电平与参考功率电平进行比较，以确定视频载波信号的存在或信道负载的增加。在检测到视频载波信号或复合功率的增加时，根据检测电路，向振荡器或衰减装置提供使能信号。

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