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1. 发明授权

US06442271B1 Digital isolation system with low power mode 失效
标题翻译：低功耗模式的数字隔离系统
公开(公告)号：US06442271B1
公开(公告)日：2002-08-27
申请号：US09034621
申请日：1998-03-04
申请人： George Tyson Tuttle , Jerrell P. Hein , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： George Tyson Tuttle , Jerrell P. Hein , Timothy J. Dupuis , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04M100
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A method and apparatus are provided for maintaining communication across an isolation barrier even if the external circuitry to which it is connected enters a low-power mode. In normal operation the isolation barrier local clock is synchronized with a clock signal provided by the external circuitry. If the external circuitry enters a low-power mode, its clock signal often slows or stops. In that case, the local clock in the isolation barrier switches to a free-running mode, wherein a VCO voltage input is provided by a bias voltage generator instead of by a PLL circuit. The VCO thus continues to provide a local clock signal in order to allow communication of information across the isolation barrier even if the external circuitry is not active. This enables the isolation barrier to receive and process an external signal, such as a ring signal, in low-power mode. Means are provided for causing the external circuitry to “wake up” in the event that a ring or other signal is detected by the isolation system, at which time the system resumes normal operation.
摘要翻译：提供了一种用于在隔离屏障上保持通信的方法和装置，即使其所连接的外部电路进入低功率模式。在正常操作中，隔离栅本地时钟与由外部电路提供的时钟信号同步。如果外部电路进入低功耗模式，则其时钟信号通常会减慢或停止。在这种情况下，隔离栅中的本地时钟切换到自由运行模式，其中VCO电压输入由偏置电压发生器而不是由PLL电路提供。因此，VCO因此继续提供本地时钟信号，以便即使外部电路不活动，也可以跨隔离屏障通信信息。这使得隔离屏障能够在低功率模式下接收和处理外部信号，例如振铃信号。提供了在隔离系统检测到环或其他信号的情况下使外部电路“唤醒”的装置，此时系统恢复正常操作。

2. 发明授权

US06307891B1 Method and apparatus for freezing a communication link during a disruptive event 失效
标题翻译：在破坏性事件期间冻结通信链路的方法和装置
公开(公告)号：US06307891B1
公开(公告)日：2001-10-23
申请号：US09034684
申请日：1998-03-04
申请人： Jerrell P. Hein , Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Jerrell P. Hein , Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1500
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A method and apparatus are provided for suspending or freezing outputs from an isolation barrier system, which may be a digital capacitive isolation barrier system, during the occurrence of events that may disrupt proper operation of the system. Examples of such disruptive events are data rate changes during modem baud rate negotiations, transition to low-power mode, and going off-hook in a telephony system. In each of these cases, the master circuit anticipates the disruption and sends a freeze signal to the isolated circuit. The freeze signal instructs the isolated circuit to enter freeze mode, and no data is sent through the isolation system. Internal control signals are generated and used to establish synchronization and framing after the disruption, and to restore normal operation of the isolation system. In preferred embodiments, the duration of the freeze period may be determined by a timer or by circuitry that detects framing lock or the presence of transients in the system. This invention prevents the transmission of erroneous control signals or corrupted data through the isolation system when it experiences a disruptive event.
摘要翻译：提供了一种方法和装置，用于在发生可能中断系统的正常操作的事件期间，将隔离屏障系统的输出悬挂或冻结，隔离屏障系统可能是数字电容隔离屏障系统。这种破坏性事件的示例是在调制解调器波特率协商，向低功耗模式转换和在电话系统中摘机时的数据速率变化。在这些情况的每一种情况下，主电路预期中断并向隔离电路发送冻结信号。冻结信号指示隔离电路进入冻结模式，没有数据通过隔离系统发送。生成内部控制信号，用于在中断之后建立同步和成帧，并恢复隔离系统的正常运行。在优选实施例中，冻结周期的持续时间可以由计时器或通过检测系统中成帧锁定或瞬态的存在的电路来确定。本发明防止当隔离系统经历中断事件时传输错误的控制信号或损坏的数据。

3. 发明授权

US07046755B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants 有权
标题翻译：用于连接到具有可切换时间常数的DC保持电路的电话线的数字接入配置电路和方法
公开(公告)号：US07046755B2
公开(公告)日：2006-05-16
申请号：US10679046
申请日：2003-10-03
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L23/00
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

4. 发明授权

US06389134B1 Call progress monitor circuitry and method for a communication system 失效
标题翻译：呼叫通信系统的进度监视电路和方法
公开(公告)号：US06389134B1
公开(公告)日：2002-05-14
申请号：US09035779
申请日：1998-03-04
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04M100
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A call progress monitor circuit is disclosed for a digital DAA in which digital information is transmitted across an isolation barrier from phone line side circuitry to powered side circuitry. In particular, the call progress monitor circuit of the present invention converts oversampled digital transmit and receive data into analog transmit and receive signals and then combines them to produce a call progress signal that is provided to be fed to a speaker driver circuit. In addition, the call progress signal in one embodiment is filtered with a low pass filter. The call progress monitor circuit in one embodiment includes oversampled digital-to-analog converters, a summing circuit, and a low pass filter. Corresponding methods for monitoring the progress of a call utilizing oversampled digital transmit and receive signals are also disclosed.
摘要翻译：公开了一种用于数字DAA的呼叫进程监视电路，其中数字信息通过隔离屏障从电话线侧电路传输到电源侧电路。特别地，本发明的呼叫进程监视电路将过采样的数字发送和接收数据转换为模拟发送和接收信号，然后将它们组合以产生提供给馈送到扬声器驱动器电路的呼叫进行信号。此外，一个实施例中的呼叫进程信号用低通滤波器滤波。一个实施例中的呼叫进程监视电路包括过采样的数模转换器，加法电路和低通滤波器。还公开了用于监视利用过采样数字发射和接收信号的呼叫进展的相应方法。

5. 发明授权

US06498825B1 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting 失效
标题翻译：用于连接到具有可编程限流的DC保持电路的电话线路的数字接入配置电路和方法
公开(公告)号：US06498825B1
公开(公告)日：2002-12-24
申请号：US09098489
申请日：1998-06-16
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1500
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

6. 发明授权

US07515672B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting 失效
标题翻译：用于连接到具有可编程限流的DC保持电路的电话线路的数字接入配置电路和方法
公开(公告)号：US07515672B2
公开(公告)日：2009-04-07
申请号：US10679013
申请日：2003-10-03
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L23/00
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable circuit for the DC termination for a variety of international phone standards. The invention may also be utilized with circuitry for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA为各种国际电话标准的DC终端提供可编程电路。本发明还可以用于跨电容隔离屏障发送和接收信号的电路。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

7. 发明授权

US07362841B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance 失效
标题翻译：用于连接到具有可切换DC终端阻抗的DC保持电路的电话线路的数字接入布置电路和方法
公开(公告)号：US07362841B2
公开(公告)日：2008-04-22
申请号：US10292290
申请日：2002-11-12
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L23/00
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

8. 发明授权

US06504864B1 Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit 失效
标题翻译：用于连接到具有二阶直流保持电路的电话线的数字接入装置电路和方法
公开(公告)号：US06504864B1
公开(公告)日：2003-01-07
申请号：US09098488
申请日：1998-06-16
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B300
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M1/573 , H04M11/06 , H04M19/001 , H04M19/02
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided that is a second order circuit. The use of a second order circuit provides improved distortion characteristics, particularly at low frequencies.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供作为二阶电路的DC保持电路。使用二阶电路提供改进的失真特性，特别是在低频下。

9. 发明授权

US06201865B1 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants 失效
标题翻译：用于连接到具有可切换时间常数的DC保持电路的电话线的数字接入配置电路和方法
公开(公告)号：US06201865B1
公开(公告)日：2001-03-13
申请号：US09097621
申请日：1998-06-16
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04M1100
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided that has switchable time constants. A first time constant may be utilized during a first operation phase immediately after off-hook conditions to allow for fast settling times. Then, a second operation phase is entered in which a second time constant may be utilized. During the second operation phase the DC holding circuit operates slower to create improved low frequency performance.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供具有可切换时间常数的DC保持电路。可以在摘机状态之后的第一操作阶段期间利用第一时间常数以允许快速建立时间。然后，输入第二操作阶段，其中可以使用第二时间常数。在第二操作阶段期间，DC保持电路运行较慢以产生改进的低频性能。

10. 发明授权

US06516024B1 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with low distortion and current limiting 失效
标题翻译：用于连接到具有低失真和电流限制的DC保持电路的电话线路的数字接入布置电路和方法
公开(公告)号：US06516024B1
公开(公告)日：2003-02-04
申请号：US09098252
申请日：1998-06-16
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04B1500
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors. Further, the current limiting mode includes a distortion adjustment circuit to limit distortion at a crossover point at which current limiting effects occur.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。此外，电流限制模式包括用于限制发生电流限制效应的交叉点处的失真的失真调整电路。

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