专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08606117B1 Systems and methods for unobtrusively testing optical fibers 有权
标题翻译：用于不引人注目的测试光纤的系统和方法
公开(公告)号：US08606117B1
公开(公告)日：2013-12-10
申请号：US12783999
申请日：2010-05-20
申请人： Michael D. Turner , Leif J. Sandstrom , John Gordon Brooks , Kevin W. Schneider , Daniel M. Joffe
发明人： Michael D. Turner , Leif J. Sandstrom , John Gordon Brooks , Kevin W. Schneider , Daniel M. Joffe
IPC分类号： H04B10/04
CPC分类号： G01M11/3118 , H04B10/071
摘要： A correlation optical time domain reflectometer (OTDR) system embeds an OTDR signal in a digital data signal that is to be converted into an optical signal and transmitted across an optical fiber to a remote receiver. In particular, the digital data signal is amplitude modulated with the OTDR signal, which is based on a pseudo noise (PN) sequence, such as an M-sequence. The amplitude modulation is relatively small, for example, less than about 10% of the digital data signal's peak amplitude in an effort to limit the OTDR signal's effect on communication performance. A sequence recovery element receives reflections from the optical fiber and converts the reflections to digital samples. Each digital sample from the sequence recovery element is correlated by correlators that respectively correspond to delays and, hence, locations along the optical fiber, and accumulators accumulate the correlation values from the correlators. Based on the accumulated values, the correlation OTDR system unobtrusively identifies anomaly locations along the optical fiber while payload data is being communicated across the fiber.
摘要翻译：相关光时域反射计（OTDR）系统将OTDR信号嵌入到要转换为光信号并通过光纤传输到远程接收器的数字数据信号中。特别地，数字数据信号用OTDR信号进行幅度调制，OTDR信号基于诸如M序列的伪噪声（PN）序列。幅度调制相对较小，例如小于数字数据信号峰值幅度的10％，以努力限制OTDR信号对通信性能的影响。序列恢复元件从光纤接收反射并将反射转换成数字样本。来自序列恢复元件的每个数字样本由分别对应于延迟的相关器和因此沿着光纤的位置相关联，并且累加器累积来自相关器的相关值。基于累积值，相关性OTDR系统在通过光纤传送有效载荷数据的同时，明确地识别沿着光纤的异常位置。

2. 发明申请

US20130251363A1 SYSTEMS AND METHODS FOR REDUCING THERMAL TAILS ON OPTICAL TIME DOMAIN REFLECTOMETER (OTDR) MEASUREMENTS 有权
标题翻译：在光时域反射计（OTDR）测量中减少热尾的系统和方法
公开(公告)号：US20130251363A1
公开(公告)日：2013-09-26
申请号：US13786636
申请日：2013-03-06
申请人： Daniel M. Joffe , Leif J. Sandstrom
发明人： Daniel M. Joffe , Leif J. Sandstrom
IPC分类号： H04B10/071
CPC分类号： H04B10/071 , G01M11/3118 , G01M11/3154
摘要： An optical communication system has a power dissipating element that is thermally coupled to an optical transmitter. The currents supplied to the transmitter and the power dissipating element are controlled such that the sum of such currents is constant. Accordingly, temperature fluctuations in the transmitter due to patterns in the transmitted data are prevented or at least reduced, thereby reducing thermal tails on measurements. In one exemplary embodiment, a light source is used as the power dissipating element, and the output of such light source is beneficially used to probe another optical fiber or to enhance the OTDR performance or analysis.
摘要翻译：光通信系统具有热耦合到光发射机的功率耗散元件。控制提供给发射器和功率耗散元件的电流，使得这些电流之和恒定。因此，防止或至少减少了由于传输数据中的图案而导致的发射机中的温度波动，从而减少了测量时的热尾迹。在一个示例性实施例中，光源用作功率耗散元件，并且这种光源的输出有利地用于探测另一光纤或增强OTDR性能或分析。

3. 发明授权

US09191102B2 Systems and methods for reducing thermal tails on optical time domain reflectometer (OTDR) measurements 有权
标题翻译：用于减少光时域反射计（OTDR）测量的热尾的系统和方法
公开(公告)号：US09191102B2
公开(公告)日：2015-11-17
申请号：US13786636
申请日：2013-03-06
申请人： Daniel M. Joffe , Leif J. Sandstrom
发明人： Daniel M. Joffe , Leif J. Sandstrom
IPC分类号： H04B10/08 , H04B17/00 , H04B10/071 , G01M11/00
CPC分类号： H04B10/071 , G01M11/3118 , G01M11/3154
摘要： An optical communication system has a power dissipating element that is thermally coupled to an optical transmitter. The currents supplied to the transmitter and the power dissipating element are controlled such that the sum of such currents is constant. Accordingly, temperature fluctuations in the transmitter due to patterns in the transmitted data are prevented or at least reduced, thereby reducing thermal tails on measurements. In one exemplary embodiment, a light source is used as the power dissipating element, and the output of such light source is beneficially used to probe another optical fiber or to enhance the OTDR performance or analysis.
摘要翻译：光通信系统具有热耦合到光发射机的功率耗散元件。控制提供给发射器和功率耗散元件的电流，使得这些电流之和恒定。因此，防止或至少减少了由于传输数据中的图案而导致的发射机中的温度波动，从而减少了测量时的热尾迹。在一个示例性实施例中，光源被用作功率耗散元件，并且这种光源的输出有利地用于探测另一光纤或增强OTDR性能或分析。

4. 发明授权

US08428192B2 Adaptive interference canceling system and method 有权
标题翻译：自适应干扰消除系统和方法
公开(公告)号：US08428192B2
公开(公告)日：2013-04-23
申请号：US12871612
申请日：2010-08-30
申请人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
发明人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
IPC分类号： H04B1/38 , H03D1/04
CPC分类号： H04M3/34 , H04L25/03885 , H04L25/085 , H04M3/002
摘要： A communication system adaptively cancels noise and/or interference from signals communicated through a communication channel, such as signals communicated by a telecommunication network. The system, based on a common mode signal of a received signal, generates an estimate of noise or interference within a differential mode signal of the received signal. The system then subtracts the estimate from the differential mode signal in an effort to remove noise from the differential mode signal thereby providing a differential mode signal that is substantially free of the estimated noise or interference.
摘要翻译：通信系统通过诸如由电信网络传送的信号通过通信信道传送的信号自适应地消除噪声和/或干扰。该系统基于接收信号的共模信号，在接收信号的差分模式信号中产生噪声或干扰的估计。系统然后从差分模式信号中减去估计值，以努力去除差分模式信号中的噪声，从而提供基本上没有估计的噪声或干扰的差模信号。

5. 发明申请

US20100322363A1 ADAPTIVE INTERFERENCE CANCELING SYSTEM AND MEHOD 有权
标题翻译：自适应干扰消除系统和MEHOD
公开(公告)号：US20100322363A1
公开(公告)日：2010-12-23
申请号：US12871612
申请日：2010-08-30
申请人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
发明人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
IPC分类号： H04B1/10
CPC分类号： H04M3/34 , H04L25/03885 , H04L25/085 , H04M3/002
摘要： A communication system adaptively cancels noise and/or interference from signals communicated through a communication channel, such as signals communicated by a telecommunication network. The system, based on a common mode signal of a received signal, generates an estimate of noise or interference within a differential mode signal of the received signal. The system then subtracts the estimate from the differential mode signal in an effort to remove noise from the differential mode signal thereby providing a differential mode signal that is substantially free of the estimated noise or interference.
摘要翻译：通信系统通过诸如由电信网络传送的信号通过通信信道传送的信号自适应地消除噪声和/或干扰。该系统基于接收信号的共模信号，在接收信号的差分模式信号中产生噪声或干扰的估计。系统然后从差分模式信号中减去估计值，以努力去除差分模式信号中的噪声，从而提供基本上没有估计的噪声或干扰的差模信号。

6. 发明授权

US07809076B1 Adaptive interference canceling system and method 有权
标题翻译：自适应干扰消除系统和方法
公开(公告)号：US07809076B1
公开(公告)日：2010-10-05
申请号：US11373841
申请日：2006-03-11
申请人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
发明人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
IPC分类号： H04L25/03 , H04M1/76 , H04M7/00
CPC分类号： H04M3/34 , H04L25/03885 , H04L25/085 , H04M3/002
摘要： A communication system adaptively cancels noise and/or interference from signals communicated through a communication channel, such as signals communicated by a telecommunication network. The system, based on a common mode signal of a received signal, generates an estimate of noise or interference within a differential mode signal of the received signal. The system then subtracts the estimate from the differential mode signal in an effort to remove noise from the differential mode signal thereby providing a differential mode signal that is substantially free of the estimated noise or interference.
摘要翻译：通信系统通过诸如由电信网络传送的信号通过通信信道传送的信号自适应地消除噪声和/或干扰。该系统基于接收信号的共模信号，在接收信号的差分模式信号中产生噪声或干扰的估计。系统然后从差分模式信号中减去估计值，以努力去除差分模式信号中的噪声，从而提供基本上没有估计的噪声或干扰的差模信号。

7. 发明授权

US07593494B1 System and method for canceling impulse noise 有权
标题翻译：消除脉冲噪声的系统和方法
公开(公告)号：US07593494B1
公开(公告)日：2009-09-22
申请号：US10948492
申请日：2004-09-23
申请人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
发明人： Ayman Ghobrial , Michael D. Turner , Daniel M. Joffe
IPC分类号： H04B1/10
CPC分类号： H04B3/30
摘要： A system for canceling impulse noise comprises an adaptive impulse canceler and a combiner. The adaptive impulse canceler is configured to receive a common mode component of a received signal and to detect a noise impulse in the common mode component. The impulse canceler is further configured to provide, based on the noise impulse in the common mode component, an impulse noise estimation for a differential mode component of the received signal. The combiner is configured to receive the differential mode component and the impulse noise estimation and to subtract the impulse noise estimation from the differential mode component.
摘要翻译：用于消除脉冲噪声的系统包括自适应脉冲消除器和组合器。自适应脉冲消除器被配置为接收接收信号的共模分量并且检测共模分量中的噪声脉冲。脉冲消除器还被配置为基于共模分量中的噪声脉冲提供用于接收信号的差模分量的脉冲噪声估计。组合器被配置为接收差分模式分量和脉冲噪声估计，并从差分模式分量中减去脉冲噪声估计。

8. 发明授权

US09614976B2 Systems and methods for powering network access devices from customer premises equipment 有权
公开(公告)号：US09614976B2
公开(公告)日：2017-04-04
申请号：US13437700
申请日：2012-04-02
申请人： Daniel M. Joffe , Jared D. Cress
发明人： Daniel M. Joffe , Jared D. Cress
IPC分类号： H04M11/06 , H04M19/00 , H04L12/28
CPC分类号： H04M11/062 , H04L12/2878 , H04M19/001
摘要： A communication system has a network access device (NAD) that is designed to deliver Plain Old Telephone Service (POTS) along with high-speed data to Customer Premises Equipment (CPE). The NAD is backpowered by the CPE across a subscriber line. When backpower is provided from the CPE, circuitry (referred to as a “POTS signaling element”) within the network access device converts POTS control signaling to digital data for transmission to the CPE. The band vacated by the POTS control signaling is used for the power signal on the subscriber line. In the absence of backpower, components of the network access device are bypassed, thereby providing POTS in the event of a power failure. The NAD receives advance warning of the backpowering so that it can disable the bypassing in order to prevent the power signal from leaking through the NAD to the network.

9. 发明授权

US08432226B1 Amplifier circuits and methods for cancelling Miller capacitance 有权
标题翻译：用于消除米勒电容的放大器电路和方法
公开(公告)号：US08432226B1
公开(公告)日：2013-04-30
申请号：US13179297
申请日：2011-07-08
申请人： Daniel M. Joffe
发明人： Daniel M. Joffe
IPC分类号： H03F1/14
CPC分类号： H03F3/45085 , H03F1/14
摘要： An amplifier circuit has an input stage, a current mirror stage, and an output stage. The output stage has a transistor for which a non-linear and/or linear Miller capacitance exists across the transistor. A capacitive element, referred to herein as a “negative Miller capacitor,” is coupled between an input node of the current mirror stage and the transistor's collector or drain causing the current flowing through the negative Miller capacitor to be inverted, supplying the current taken by the usual Miller capacitance of the output stage. Thus, the negative Miller capacitor cancels the usual Miller capacitance across the transistor of the output stage, and such cancellation occurs without significantly increasing the amplifier's input power and costs. In some embodiments, both linear and non-linear components of the usual Miller capacitor are cancelled. Further, cancellation of the Miller capacitance generally enhances bandwidth and reduces distortion, thereby improving the performance of the operational amplifier.
摘要翻译：放大电路具有输入级，电流镜级和输出级。输出级具有晶体管，晶体管在晶体管两端存在非线性和/或线性米勒电容。电容元件（这里称为“负的米勒电容器”）耦合在电流镜级的输入节点和晶体管的集电极或漏极之间，导致流过负的米勒电容器的电流被反相，从而提供由输出级通常的米勒电容。因此，负的米勒电容器消除了输出级晶体管两端通常的米勒电容，并且这种消除不会显着增加放大器的输入功率和成本。在一些实施例中，通常的米勒电容器的线性和非线性分量均被消除。此外，取消米勒电容通常会增加带宽并减少失真，从而提高运算放大器的性能。

10. 发明授权

US08400220B1 Quiescent current control for class AB output stages 有权
标题翻译： AB类输出级的静态电流控制
公开(公告)号：US08400220B1
公开(公告)日：2013-03-19
申请号：US13211068
申请日：2011-08-16
申请人： Daniel M. Joffe , Paul C. Ferguson
发明人： Daniel M. Joffe , Paul C. Ferguson
IPC分类号： H03F3/18
CPC分类号： H03F3/45237 , H03F1/301 , H03F1/3211 , H03F3/3028 , H03F3/45659 , H03F2200/453 , H03F2200/456 , H03F2203/45674
摘要： Quiescent current control for Class AB output stages is provided that is responsive to a sum of current of the pull-up and pull-down transistors in the crossover region, and responsive to a minimum of the pull-up or pull-down transistors otherwise. Replicating transistors operate responsive to activation of the pull-up and pull-down transistors. Additional circuit elements provide a summed current output that corrects for quiescent current variation, while having good operation over PVT variations, and having minimal distortive effects. Use of scaled replicating transistors reduces the current in the quiescent current control circuit. Additionally, a current limiter or topology change may be used to reduce current spikes in replication of the output stage current. Adjustment of a reference current can also prevent turning off a non-active output element to reduce the need to stew the element back on.
摘要翻译：提供AB类输出级的静态电流控制，其响应于交叉区域中的上拉和下拉晶体管的电流之和，否则响应于最小的上拉或下拉晶体管。复制晶体管响应于上拉和下拉晶体管的激活而工作。附加电路元件提供校正静态电流变化的总和电流输出，同时对PVT变化具有良好的操作，并且具有最小的失真效应。使用经缩放的复制晶体管降低了静态电流控制电路中的电流。另外，可以使用电流限制器或拓扑变化来减少输出级电流的复制中的电流尖峰。参考电流的调整还可以防止关闭非有效输出元件，以减少重新启动元件的需要。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式