公开(公告)号：US08797854B2

公开(公告)日：2014-08-05

申请号：US12240684

申请日：2008-09-29

申请人： Alon Bernstein ,  John Skrobko ,  John T. Chapman

发明人： Alon Bernstein ,  John Skrobko ,  John T. Chapman

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L47/15 ,  H04N7/17309 ,  H04N7/22 ,  H04N21/6118 ,  H04N21/6168

摘要： A method for use in an RFoG cable network calls for allocating upstream bandwidth to CM devices, wherein allocating bandwidth includes selecting a start time and allocating respective time slots relative to the selected start time to at least one of the requesting CM devices; and further, allocating the same timeslots over multiple selected upstream channels, thereby aligning upstream transmissions from the requesting CMs across the selected upstream channels. Several embodiments are disclosed to enable DOCSIS 3.0 type scheduling over an RFoG network.

摘要翻译： 在RFoG电缆网络中使用的方法要求向CM设备分配上行带宽，其中，分配带宽包括选择开始时间并相对于所选择的开始时间将相应的时隙分配给所请求的CM设备中的至少一个; 并且进一步，在多个所选择的上行信道上分配相同的时隙，由此在所选择的上游信道上对准来自请求CM的上行传输。 公开了若干实施例以通过RFoG网络实现DOCSIS 3.0类型调度。

公开(公告)号：US5347389A

公开(公告)日：1994-09-13

申请号：US068371

申请日：1993-05-27

申请人： John Skrobko

发明人： John Skrobko

IPC分类号： H03F1/22 ,  H04B10/158 ,  H04B10/06

CPC分类号： H04B10/6973 ,  H03F1/22 ,  H04B10/6931

摘要： An improved optical receiver for an optical signal amplitude modulated with broadband RF signals is described. The optical receiver includes an optical detector which receives the optical signal and generates a radio frequency electrical signal which varies with the intensity level of the incoming optical signal. The electrical signal is applied antiphased from the optical detector to a pair of cascode transimpedance amplifiers which are coupled in a push-pull relationship. The coupling from the optical detector is matched to each of the inputs of the cascode amplifiers. Bias networks are used for each amplifier to maintain the gain stability of the receiver and to provide better output impedance matching to a coaxial cable for CATV distribution. The optical receiver can provide greater output power for the same input power because of the shared bias currents of the cascode stages in each amplifier.

摘要翻译： 描述了用于利用宽带RF信号幅度调制的光信号的改进的光接收机。 光接收机包括光检测器，其接收光信号并产生随输入光信号的强度级别而变化的射频电信号。 电信号从光学检测器反相施加到以推挽关系耦合的一对共源共栅跨阻放大器。 来自光学检测器的耦合与共源共栅放大器的每个输入匹配。 每个放大器都使用偏置网络来保持接收机的增益稳定性，并为同轴电缆提供更好的输出阻抗匹配，用于CATV分配。 由于每个放大器中的共源共栅偏置电流共享偏置电流，光接收器可以为相同的输入功率提供更大的输出功率。

公开(公告)号：US07599629B2

公开(公告)日：2009-10-06

申请号：US10456817

申请日：2003-06-06

申请人： Walid Kamali ,  John Skrobko

发明人： Walid Kamali ,  John Skrobko

IPC分类号： H04B10/06

CPC分类号： H04B10/6931

摘要： The present invention is directed towards an optical receiver including an open loop automatic gain control (AGC) circuit. Optical signals received by the optical receiver are converted to electrical signals via a photodiode. The electrical signals are subsequently amplified through an input and an output amplifier stage. The amplified signal is then converted to RF signals and provided to an output port for further transmission. Concurrently, the AGC circuit senses the input optical power level at the input photodiode. The input optical power level is compared with a reference voltage, thereby providing a difference voltage. The difference voltage is applied to input and output amplifier stages for correcting the electrical signals to ensure a constant output power level.

摘要翻译： 本发明涉及一种包括开环自动增益控制（AGC）电路的光接收机。 由光接收器接收的光信号通过光电二极管转换成电信号。 电信号随后通过输入和输出放大器级放大。 然后将放大的信号转换成RF信号并提供给输出端口用于进一步传输。 同时，AGC电路感测输入光电二极管处的输入光功率电平。 将输入光功率电平与参考电压进行比较，从而提供差分电压。 差分电压被施加到输入和输出放大器级，用于校正电信号以确保恒定的输出功率电平。

公开(公告)号：US06674967B2

公开(公告)日：2004-01-06

申请号：US09992891

申请日：2001-11-14

申请人： John Skrobko ,  Robert R. Riggsby

发明人： John Skrobko ,  Robert R. Riggsby

IPC分类号： H04J1400

CPC分类号： H04B10/6911

摘要： A fiber-to-the-home (FTTH) system transmits forward and reverse optical signals, such as video, voice, and data signals, via optical fiber, and includes a plurality of home network units. The home network units include an FTTH optical receiver for receiving at least one of the video, voice, and data signals. A triplexer distinguishes and separates the video, voice, and data signals, wherein the video signals have a first wavelength and the voice and data signals have a second wavelength. The voice and data signals are provided to the home network unit for further processing. The triplexer provides an electrical signal to the amplifier stages. The amplifier stages include a preamplifier stage and a postamplifier stage. A gain control circuit automatically adjusts the gain of the video signal based upon the input power level to the FTTH optical receiver. Additionally, a tilt network performs level compensation for externally located coaxial cable. A video signal is then provided to a video device located within a home via the coaxial cable.

摘要翻译： 光纤到户（FTTH）系统通过光纤传输诸如视频，语音和数据信号的正向和反向光信号，并且包括多个家庭网络单元。 家庭网络单元包括用于接收视频，语音和数据信号中的至少一个的FTTH光接收机。 三工器区分和分离视频，语音和数据信号，其中视频信号具有第一波长，并且声音和数据信号具有第二波长。 语音和数据信号被提供给家庭网络单元用于进一步处理。 三工器为放大器级提供电信号。 放大器级包括前置放大器级和后置放大级。 增益控制电路根据对FTTH光接收机的输入功率电平自动调整视频信号的增益。 此外，倾斜网络对外部定位的同轴电缆执行电平补偿。 然后，经由同轴电缆将视频信号提供给位于家庭内的视频设备。

公开(公告)号：US5442472A

公开(公告)日：1995-08-15

申请号：US306448

申请日：1994-09-19

申请人： John Skrobko

发明人： John Skrobko

IPC分类号： H04N17/00 ,  H04B10/08 ,  H04N7/173 ,  H04N7/22

CPC分类号： H04N7/173 ,  H04N7/22

摘要： A fiber optic status monitoring system for a fiber optic cable television system is disclosed in which a computer serially polls a plurality of optical transmitter modules, optical receiver modules, or other cable television component modules to determine their operation. Each of the monitored components at a given location are connected together together by a common bus. In addition, each of the transmitter modules and the receiver modules include a monitoring/control unit. The computer transmits a command signal to an interface unit. The interface unit transmits the command signal to the transmitter modules via a bus. The command signal is modulated at the interface unit and transmitted over a bidirectional link. The modulated command signal is received and demodulated by a status monitoring interface unit. The status monitoring interface unit distributes the command signal to each of the monitored modules at that location. If the command signal is a query command signal, a monitoring unit transmits information on the operation of the module. If the command signal is a control command signal, a monitoring unit serves to supply control signals to the module.

摘要翻译： 公开了一种用于光纤电缆电视系统的光纤状态监视系统，其中计算机连续轮询多个光发射器模块，光接收器模块或其它有线电视组件模块以确定其操作。 每个受监视的组件通过公共总线连接在一起。 另外，发射机模块和接收机模块中的每一个包括监控/控制单元。 计算机向接口单元发送命令信号。 接口单元通过总线将命令信号发送到发射机模块。 命令信号在接口单元处被调制，并通过双向链路传输。 调制的命令信号由状态监视接口单元接收和解调。 状态监视接口单元将命令信号分配到该位置处的每个监视模块。 如果命令信号是查询命令信号，则监视单元发送关于模块的操作的信息。 如果命令信号是控制命令信号，则监视单元用于向模块提供控制信号。

公开(公告)号：US20100083330A1

公开(公告)日：2010-04-01

申请号：US12240684

申请日：2008-09-29

申请人： Alon Bernstein ,  John Skrobko ,  John Torrence Chapman

发明人： Alon Bernstein ,  John Skrobko ,  John Torrence Chapman

IPC分类号： H04N7/22

CPC分类号： H04L47/15 ,  H04N7/17309 ,  H04N7/22 ,  H04N21/6118 ,  H04N21/6168

摘要： A method for use in an RFoG cable network calls for allocating upstream bandwidth to CM devices, wherein allocating bandwidth includes selecting a start time and allocating respective time slots relative to the selected start time to at least one of the requesting CM devices; and further, allocating the same timeslots over multiple selected upstream channels, thereby aligning upstream transmissions from the requesting CMs across the selected upstream channels. Several embodiments are disclosed to enable DOCSIS 3.0 type scheduling over an RFoG network.

摘要翻译： 在RFoG电缆网络中使用的方法要求向CM设备分配上行带宽，其中，分配带宽包括选择开始时间并相对于所选择的开始时间将相应的时隙分配给所请求的CM设备中的至少一个; 并且进一步，在多个所选择的上行信道上分配相同的时隙，由此在所选择的上游信道上对准来自请求CM的上行传输。 公开了若干实施例以通过RFoG网络实现DOCSIS 3.0类型调度。

公开(公告)号：US20080310842A1

公开(公告)日：2008-12-18

申请号：US11762829

申请日：2007-06-14

申请人： John Skrobko

发明人： John Skrobko

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04B10/25753 ,  H04J14/02 ,  H04J14/0227 ,  H04J14/0232 ,  H04J14/0238 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298 ,  H04Q11/0067 ,  H04Q11/0071

摘要： In one embodiment, systems for transporting a signal between at least one control point and a user device, comprising a passive optical network operatively coupled to the at least one control point and an optical network termination operatively coupled to the passive optical network and operatively coupled to the user device, wherein the optical network termination comprises an upstream laser and an upstream laser driver coupled to the upstream laser and an upstream laser driver trigger, the upstream laser driver trigger is configured to activate the upstream laser driver and initiate an upstream signal in compliance with Data Over Cable Service Interface Specification (DOCSIS) from the user device to the at least one control point.

摘要翻译： 在一个实施例中，用于在至少一个控制点和用户设备之间传送信号的系统，包括可操作地耦合到所述至少一个控制点的无源光网络和可操作地耦合到所述无源光网络的光网络终端，并且可操作地耦合到 所述用户设备，其中所述光网络终端包括上游激光器和耦合到所述上游激光器的上游激光驱动器和上游激光驱动器触发器，所述上游激光驱动器触发器被配置为激活所述上游激光驱动器并且以符合性的方式启动上游信号 通过电缆服务接口规范（DOCSIS）从用户设备到至少一个控制点。

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。