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.

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。

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。

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。

公开(公告)号：US08243412B2

公开(公告)日：2012-08-14

申请号：US12430694

申请日：2009-04-27

申请人： James B. Wiese ,  Daniel M. Joffe

发明人： James B. Wiese ,  Daniel M. Joffe

IPC分类号： H01C7/12 ,  H02H11/00

CPC分类号： H04L12/2881 ,  H02H9/008

摘要： The present disclosure generally pertains to surge protection systems that protect outside plant equipment from high-energy surges. In one exemplary embodiment, a protection system is used for protecting Ethernet equipment that is coupled to an outside Ethernet cable. The protection system provides protection and remains capable of coupling signal energy between an Ethernet cable and Ethernet equipment without significantly degrading Ethernet performance. However, the protection system, while allowing the desirable Ethernet signals to pass between the cable and the equipment, prevents the electrical voltages and currents of high-energy surges, such as surges from lightning or AC power faults, from damaging the Ethernet equipment.

摘要翻译： 本公开通常涉及用于保护设备外部设备免受高能量浪涌的浪涌保护系统。 在一个示例性实施例中，保护系统用于保护耦合到外部以太网电缆的以太网设备。 保护系统提供保护，并且仍然能够在以太网电缆和以太网设备之间耦合信号能量，而不会显着降低以太网性能。 然而，保护系统在允许希望的以太网信号在电缆和设备之间通过时，可防止诸如闪电或AC电源故障的高能量浪涌的电压和电流损坏以太网设备。

公开(公告)号：US07773744B1

公开(公告)日：2010-08-10

申请号：US10981285

申请日：2004-11-04

申请人： Daniel M. Joffe

发明人： Daniel M. Joffe

IPC分类号： H04M1/00

CPC分类号： H04M1/738 ,  H04M19/001 ,  H04Q2213/1319 ,  H04Q2213/13305 ,  H04Q2213/1332

摘要： A sealing current system for a subscriber line that comprises a power source coupled to a first end of the subscriber line configured to apply a voltage to the subscriber line. The sealing current termination circuit coupled to a second end of the subscriber line configured to limit a current in the subscriber line, the current produced by the applied voltage.

摘要翻译： 一种用于用户线路的密封电流系统，其包括耦合到所述用户线路的第一端的电源，所述第一端被配置为向所述用户线路施加电压。 耦合到用户线路的第二端的密封电流终端电路被配置为限制用户线路中的电流，即由所施加的电压产生的电流。

公开(公告)号：US07701689B1

公开(公告)日：2010-04-20

申请号：US12023818

申请日：2008-01-31

申请人： Daniel M. Joffe ,  Grant J. Kruse ,  Jeremy L. Harris

发明人： Daniel M. Joffe ,  Grant J. Kruse ,  Jeremy L. Harris

IPC分类号： H02H1/04

CPC分类号： H04Q1/028 ,  H04M1/745

摘要： A protector block assembly interfaces a plurality of subscriber lines to communication equipment, such as digital subscriber line (DSL) modems. The assembly has a protector block into which surge protection modules are plugged. Each surge protection module limits the current that may pass from a respective subscriber line to communication equipment protected by the assembly. When plugged into the protector block, the surge protection modules are oriented such that crosstalk interference from the protector block is canceled thereby reducing the amount of crosstalk introduced by the protector block.

摘要翻译： 保护块组件将多个用户线路连接到诸如数字用户线（DSL）调制解调器的通信设备。 组件具有保护器块，浪涌保护模块插入其中。 每个浪涌保护模块将可能从相应的用户线传递到通过组件保护的通信设备的电流进行限制。 当插入保护器块时，浪涌保护模块被定向成使得来自保护器块的串扰干扰被消除，从而减少由保护器块引入的串扰量。

公开(公告)号：US07478029B1

公开(公告)日：2009-01-13

申请号：US10980066

申请日：2004-11-03

申请人： Daniel M. Joffe

发明人： Daniel M. Joffe

IPC分类号： G06F17/50

CPC分类号： H04B3/40

摘要： A cable simulator that comprises an input device configured to receive a communication signal. The cable simulator further comprises a circuit configured to simulate attenuation in both the differential mode and common mode components of a communication signal.

摘要翻译： 一种电缆模拟器，包括被配置为接收通信信号的输入装置。 电缆模拟器还包括被配置为模拟通信信号的差分模式和共模分量中的衰减的电路。

公开(公告)号：US5748637A

公开(公告)日：1998-05-05

申请号：US540305

申请日：1995-10-06

申请人： Daniel M. Joffe ,  Donald C. Panek, Jr.

发明人： Daniel M. Joffe ,  Donald C. Panek, Jr.

IPC分类号： H04J3/06 ,  H04J3/12 ,  H04Q1/457 ,  H04Q11/04 ,  H04M3/22

CPC分类号： H04Q1/4575 ,  H04J3/0608 ,  H04J3/0614 ,  H04J3/125 ,  H04Q11/04 ,  H04Q2213/13054 ,  H04Q2213/13097 ,  H04Q2213/1316 ,  H04Q2213/13194 ,  H04Q2213/13204 ,  H04Q2213/13213 ,  H04Q2213/13216 ,  H04Q2213/13299 ,  H04Q2213/13405

摘要： Dual tone multi-frequency (DTMF) address signaling on four-wire switched 56 kilobits per second (Kbps) service lines is obtained by determining the proper byte boundary information. An iterative learning process is used with an existing digital switching network having a call progress indication capability. The learning process steps through each possible byte alignment until the call progress protocol indicates that a proper byte alignment has been achieved. Once a proper byte alignment has been determined, that byte alignment information is retained for subsequent use, thus avoiding the need to repeat the learning process.

摘要翻译： 通过确定适当的字节边界信息，获得四线交换56千比特每秒（Kbps）业务线上的双音多频（DTMF）地址信令。 与具有呼叫进程指示能力的现有数字交换网络一起使用迭代学习过程。 学习过程通过每个可能的字节对齐，直到调用进度协议指示已经实现了正确的字节对齐。 一旦确定了正确的字节对齐，该字节对齐信息被保留以供后续使用，因此避免了重复学习过程的需要。

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。