公开(公告)号：US07283584B2

公开(公告)日：2007-10-16

申请号：US10780142

申请日：2004-02-17

申请人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

发明人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04M1/573 ,  H04L7/033 ,  H04L25/0266 ,  H04L25/06 ,  H04M1/76 ,  H04M3/007 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

摘要： An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.

公开(公告)号：US07190785B2

公开(公告)日：2007-03-13

申请号：US10814862

申请日：2004-03-31

申请人： Jerrell P. Hein ,  Navdeep S. Sooch

发明人： Jerrell P. Hein ,  Navdeep S. Sooch

IPC分类号： H04M19/00

CPC分类号： H04M1/738 ,  H04M1/745 ,  H04M3/005 ,  H04M3/04 ,  H04M3/2272 ,  H04M19/00 ,  H04M19/005

摘要： Subscriber line interface circuitry includes an integrated circuit having sense inputs for a sensed tip signal and a sensed ring signal of a subscriber loop. The integrated circuit generates a subscriber loop linefeed driver control signal in response to the sensed signals. In one embodiment, A linefeed driver includes power circuitry for providing battery feed to the ring and tip nodes of the subscriber loop in accordance with the linefeed control signal. The linefeed driver includes sense circuitry providing a sensed tip signal and a sensed ring signal. The sensed tip and ring signals correspond to a tip current and a ring current of the subscriber loop. In one embodiment, the integrated circuit is a complementary metal oxide semiconductor (CMOS) integrated circuit. In one embodiment, the linefeed driver comprises only discrete components.

摘要翻译： 用户线接口电路包括具有用于感测的尖端信号的感测输入和用户环路的感测振铃信号的集成电路。 集成电路响应于感测信号产生用户环路线路馈送驱动器控制信号。 在一个实施例中，线路馈送驱动器包括用于根据线路进给控制信号向用户环路的环和尖端节点提供电池馈电的电源电路。 换行驱动器包括提供感测到的尖端信号和感测到的振铃信号的感测电路。 感测到的尖端和振铃信号对应于用户回路的尖端电流和环形电流。 在一个实施例中，集成电路是互补金属氧化物半导体（CMOS）集成电路。 在一个实施例中，换行驱动器仅包括分立部件。

公开(公告)号：US07180999B1

公开(公告)日：2007-02-20

申请号：US09298008

申请日：1999-04-22

申请人： Jerrell P. Hein ,  Navdeep S. Sooch

发明人： Jerrell P. Hein ,  Navdeep S. Sooch

IPC分类号： H04M19/00

CPC分类号： H04M1/738 ,  H04M1/745 ,  H04M3/005 ,  H04M3/04 ,  H04M3/2272 ,  H04M19/00 ,  H04M19/005

摘要： Subscriber line interface circuitry includes an integrated circuit having sense inputs for a sensed tip signal and a sensed ring signal of a subscriber loop. The integrated circuit generates a subscriber loop linefeed driver control signal in response to the sensed signals. The linefeed driver does not reside with the integrated circuit. In one embodiment, the linefeed driver includes power circuitry for providing battery feed to the ring and tip nodes of the subscriber loop in accordance with the linefeed control signal. The linefeed driver includes sense circuitry providing a sensed tip signal and a sensed ring signal. The sensed tip and ring signals correspond to a tip current and a ring current of the subscriber loop. In one embodiment, the integrated circuit is a complementary metal oxide semiconductor (CMOS) integrated circuit. In one embodiment, the linefeed driver comprises only discrete components.

摘要翻译： 用户线接口电路包括具有用于感测的尖端信号的感测输入和用户环路的感测振铃信号的集成电路。 集成电路响应于感测信号产生用户环路线路馈送驱动器控制信号。 换行驱动器不在集成电路中。 在一个实施例中，线路馈送驱动器包括用于根据线路馈送控制信号向用户环路的环和尖端节点提供电池馈送的电源电路。 换行驱动器包括提供感测到的尖端信号和感测到的振铃信号的感测电路。 感测到的尖端和振铃信号对应于用户回路的尖端电流和环形电流。 在一个实施例中，集成电路是互补金属氧化物半导体（CMOS）集成电路。 在一个实施例中，换行驱动器仅包括分立部件。

公开(公告)号：US07072389B2

公开(公告)日：2006-07-04

申请号：US10227104

申请日：2002-08-23

申请人： Jeffrey W. Scott ,  Navdeep S Sooch ,  David R. Welland

发明人： Jeffrey W. Scott ,  Navdeep S Sooch ,  David R. Welland

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04M1/573 ,  H04L7/033 ,  H04L25/0266 ,  H04L25/06 ,  H04M1/76 ,  H04M3/007 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

摘要： An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.

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。

公开(公告)号：US06975723B2

公开(公告)日：2005-12-13

申请号：US10429795

申请日：2003-05-05

申请人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland ,  Jerrell P. Hein ,  Andrew W. Krone

发明人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland ,  Jerrell P. Hein ,  Andrew W. Krone

IPC分类号： H03M1/42 ,  H04L7/033 ,  H04L25/02 ,  H04L25/06 ,  H04M1/57 ,  H04M11/06 ,  H04M19/00 ,  H04M19/02 ,  H04M1/00 ,  H04M9/00

CPC分类号： H04M1/573 ,  H04L7/033 ,  H04L25/0266 ,  H04L25/06 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

摘要： A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst circuitry may be powered from the user powered circuitry by the transmission of power across the isolation barrier rather than being powered from the phone line. Thus, loop current need not be drawn from the TIP/RING lines during ringer bursts. The isolation barrier may be a capacitive isolation barrier which allows bidirectional communication and extraction of power from signals transmitted across the barrier.

摘要翻译： 提供一种通信系统，其在振铃突发期间几乎不消除环路电流，并且仅在呼叫者ID字段期间吸引挂机环路电流。 更具体地，振铃突发电路可以由用户供电的电路通过跨隔离屏障的功率传输而不是从电话线供电。 因此，在振铃器脉冲串期间，不需要从TIP / RING线路中抽出回路电流。 隔离屏障可以是电容隔离屏障，其允许通过屏障传输的信号的双向通信和功率提取。

公开(公告)号：US06823066B1

公开(公告)日：2004-11-23

申请号：US09347689

申请日：1999-07-02

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

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

IPC分类号： H04M100

CPC分类号： H04L25/0266 ,  H04L7/033 ,  H04L25/06 ,  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 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：US06611553B1

公开(公告)日：2003-08-26

申请号：US09591684

申请日：2000-06-09

申请人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

发明人： Jeffrey W. Scott ,  Navdeep S. Sooch ,  David R. Welland

IPC分类号： H04M318

CPC分类号： H04L25/0266 ,  H04L7/033 ,  H04L25/06 ,  H04M11/06

摘要： An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.

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。

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。