公开(公告)号：US07046755B2

公开(公告)日：2006-05-16

申请号：US10679046

申请日：2003-10-03

Applicant: Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04L23/00

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M11/06 ,  H04M19/001

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06823066B1

公开(公告)日：2004-11-23

申请号：US09347689

申请日：1999-07-02

Applicant: George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04M100

CPC classification number: H04L25/0266 ,  H04L7/033 ,  H04L25/06 ,  H04M11/06 ,  H04M19/001

Abstract: A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines. Briefly described, a means for providing a proper hookswitch transition for a variety of international phone standards is provided. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DAA circuitry may be utilized which satisfies many or all hookswitch transition standards without the use of additional discrete devices. The hookswitch transition standards may be satisfied by ramping down the current flowing through the hookswitch prior to transitioning the hookswitch state. In this manner the hookswitch current change as a function of time (di/dt) may be decreased. Thus, the current through the hookswitch may be actively controlled prior to switching the hookswitch from an off-hook condition to an on-hook condition. By controlling the current drawn from the phone lines through the hookswitch, the maximum voltage seen at the phone company exchange may be decreased.

公开(公告)号：US06442271B1

公开(公告)日：2002-08-27

申请号：US09034621

申请日：1998-03-04

Applicant: George Tyson Tuttle ,  Jerrell P. Hein ,  Timothy J. Dupuis ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： George Tyson Tuttle ,  Jerrell P. Hein ,  Timothy J. Dupuis ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04M100

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M1/573 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06389134B1

公开(公告)日：2002-05-14

申请号：US09035779

申请日：1998-03-04

Applicant: Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04M100

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M1/573 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06522745B1

公开(公告)日：2003-02-18

申请号：US09347688

申请日：1999-07-02

Applicant: George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04M100

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M11/06 ,  H04M19/001

Abstract: A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines. Briefly described, a means for providing a proper ringer impedance for a variety of international phone standards while also providing a proper isolation barrier to the phone line is disclosed. More particularly, a DAA circuitry may be utilized which satisfies many or all ringer impedance standards without the use of additional discrete impedance devices. The ringer impedance standards may be satisfied by use of an impedance structure coupled between the TIP and RING lines and actively controlling the current drawn through the hookswitch devices when a ringing event is detected so as to control the impedance seen at the TIP and RING lines during a ringing event. The detection of the ringing event may be performed on the phone line side of an isolation barrier. By controlling the current drawn from the phone lines with the hookswitch circuitry, an impedance placed in parallel with the TIP and RING lines may in effect be synthesized. In one embodiment the impedance of the impedance structure may be infinity (i.e., the impedance structure across the TIP and RING lines is not utilized). In this case, the current drawn through the hookswitch will sufficiently synthesize an impedance across (or in parallel with) the TIP and RING lines that dominates and effectively sets the impedance seen at the TIP and RING lines. The DAA may also include means for transmitting and receiving a signal across a capacitive isolation barrier.

Abstract translation: 可以使用数字直接访问布置（DAA）电路来终止用户端的电话连接，以提供用于到达和来自电话线的信号的通信路径。 简要描述了一种用于为各种国际电话标准提供适当的振铃阻抗的装置，同时为电话线路提供适当的隔离屏障。 更具体地，可以使用满足许多或所有振铃阻抗标准的DAA电路，而不使用附加的离散阻抗器件。 可以通过使用耦合在TIP和RING线之间的阻抗结构来满足振铃器阻抗标准，并且当检测到振铃事件时主动控制通过钩开关装置吸取的电流，以便控制在TIP和RING线处看到的阻抗 一个振铃事件。 可以在隔离屏障的电话线侧执行振铃事件的检测。 通过利用钩开关电路控制从电话线抽取的电流，可以合成与TIP和RING线平行放置的阻抗。 在一个实施例中，阻抗结构的阻抗可以是无穷大的（即，不利用跨越TIP和RING线路的阻抗结构）。 在这种情况下，通过钩开关引出的电流将充分地合成阻碍TIP和RING线（或并联）的阻抗，这些线主导和有效地设置了在TIP和RING线路处看到的阻抗。 DAA还可以包括用于在电容隔离屏障上发送和接收信号的装置。

公开(公告)号：US06516024B1

公开(公告)日：2003-02-04

申请号：US09098252

申请日：1998-06-16

Applicant: Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04B1500

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M11/06 ,  H04M19/001

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06307891B1

公开(公告)日：2001-10-23

申请号：US09034684

申请日：1998-03-04

Applicant: Jerrell P. Hein ,  Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： Jerrell P. Hein ,  Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04B1500

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M1/573 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08521099B2

公开(公告)日：2013-08-27

申请号：US11824568

申请日：2007-06-29

Applicant: Lawrence Der ,  George Tyson Tuttle ,  Alessandro Piovaccari ,  Chunyu Xin ,  Scott Haban ,  Javier Elenes ,  Dan Kasha ,  Peter Vancorenland

Inventor： Lawrence Der ,  George Tyson Tuttle ,  Alessandro Piovaccari ,  Chunyu Xin ,  Scott Haban ,  Javier Elenes ,  Dan Kasha ,  Peter Vancorenland

IPC: H04B1/38

CPC classification number: H04B1/40 ,  H03M3/398 ,  H03M3/40 ,  H03M3/448 ,  H03M3/452 ,  H03M3/50

Abstract: A transceiver includes a processor, which is adapted to in a transmit mode of the transceiver, form at least part of a transmitter and in a receive mode of the transceiver, form at least part of a receiver. The transceiver may include at least one analog-to-digital converter to provide digital signals to the processor in both the transmit and receive modes of operation; and the transceiver may include at least one digital-to-analog converter to receive digital signals from the processor in the transmit and receive modes of operation. The processor may be fabricated on an integrated circuit with at least one of the analog-to-digital converters and/or with at least one of the digital-to-analog converters.

Abstract translation: 收发器包括适于处于收发器的发射模式的处理器，形成发射器的至少一部分并且在收发器的接收模式中形成接收器的至少一部分。 收发器可以包括至少一个模拟 - 数字转换器，以在发送和接收操作模式中向处理器提供数字信号; 并且收发器可以包括至少一个数模转换器，以在发送和接收操作模式中从处理器接收数字信号。 处理器可以在与至少一个模数转换器和/或至少一个数模转换器的集成电路上制造。

公开(公告)号：US08331887B2

公开(公告)日：2012-12-11

申请号：US12650166

申请日：2009-12-30

Applicant: George Tyson Tuttle ,  Younes Djadi ,  Russell Croman ,  Scott Thomas Haban ,  Javier Elenes ,  Lokesh Duraiappah

Inventor： George Tyson Tuttle ,  Younes Djadi ,  Russell Croman ,  Scott Thomas Haban ,  Javier Elenes ,  Lokesh Duraiappah

IPC: H04B7/08 ,  H04K3/00

CPC classification number: H04B7/0682 ,  H04L25/03866

Abstract: In an embodiment, a tuner circuit includes an inter-chip receiver circuit configurable to couple to a first inter-chip communication link to receive a first data stream and includes an analog-to-digital converter configured to convert a radio frequency signal into a digital version of the radio frequency signal. The tuner circuit further includes a digital signal processor coupled to the inter-chip receiver circuit and the analog-to-digital converter. The digital signal processor is configurable to generate an output signal related to at least one of the first data stream and the digital version of the radio frequency signal based on a selected operating mode.

Abstract translation: 在一个实施例中，调谐器电路包括可配置为耦合到第一芯片间通信链路以接收第一数据流的芯片间接收器电路，并且包括被配置为将射频信号转换为数字 版本的射频信号。 调谐器电路还包括耦合到芯片间接收器电路和模数转换器的数字信号处理器。 数字信号处理器可配置为基于所选择的操作模式生成与第一数据流和数字版本的数字版本中的至少一个相关的输出信号。

公开(公告)号：US07515672B2

公开(公告)日：2009-04-07

申请号：US10679013

申请日：2003-10-03

Applicant: Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

Inventor： Timothy J. Dupuis ,  George Tyson Tuttle ,  Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC: H04L23/00

CPC classification number: H04L25/06 ,  H04L7/033 ,  H04L25/0266 ,  H04M11/06 ,  H04M19/001

Abstract: 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.

Abstract translation: 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。