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    • 2. 发明授权
    • Integrated modem and line-isolation circuitry and associated method utilizing a DC termination pin to monitor line voltage
    • 集成的调制解调器和线路隔离电路及相关方法利用直流端接引脚来监视线路电压
    • US06771696B1
    • 2004-08-03
    • US09603022
    • 2000-06-26
    • George T. TuttleYunteng HuangTimothy J. Dupuis
    • George T. TuttleYunteng HuangTimothy J. Dupuis
    • H04B138
    • H04L27/00H04L25/0266H04L25/4927
    • An improved modem architecture and associated method are disclosed that integrate modem and line-isolation circuitry so as to achieve modem functionality and system-side isolation functionality on a single integrated circuit. The combined modem and line isolation system has both on-hook and off-hook intrusion detection for use with parallel connected phone line connection devices. During on-hook intrusion detection, when the combined modem and line isolation system is on-hook the system can detect if other parallel connected phone line connection devices are already off-hook. During off-hook intrusion detection, when the combined modem and line isolation system is off-hook the system can detect if other parallel connected phone line connection devices are attempting to go off-hook. On-hook intrusion detection may be accomplished by monitoring the phone line voltage through a pin utilized for setting DC termination characteristics.
    • 公开了一种改进的调制解调器架构和相关联的方法,其集成了调制解调器和线路隔离电路,以便在单个集成电路上实现调制解调器功能和系统侧隔离功能。 组合的调制解调器和线路隔离系统具有挂机和摘机入侵检测功能,可与并行连接的电话线路连接设备一起使用。 在挂机入侵检测期间,当组合的调制解调器和线路隔离系统挂机时,系统可以检测其他并行连接的电话线路连接设备是否已经摘机。 在摘机入侵检测期间,当组合的调制解调器和线路隔离系统摘机时,系统可以检测其他并行连接的电话线路连接设备是否正试图摘机。 挂机入侵检测可以通过用于设置DC终端特性的引脚监控电话线电压来实现。
    • 3. 发明授权
    • Method and apparatus for freezing a communication link during a disruptive event
    • 在破坏性事件期间冻结通信链路的方法和装置
    • US06307891B1
    • 2001-10-23
    • US09034684
    • 1998-03-04
    • Jerrell P. HeinTimothy J. DupuisGeorge Tyson TuttleJeffrey W. ScottNavdeep S. SoochDavid R. Welland
    • Jerrell P. HeinTimothy J. DupuisGeorge Tyson TuttleJeffrey W. ScottNavdeep S. SoochDavid R. Welland
    • H04B1500
    • H04L25/06H04L7/033H04L25/0266H04M1/573H04M11/06H04M19/001H04M19/02
    • 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.
    • 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。
    • 4. 发明授权
    • Digital isolation system with low power mode
    • 低功耗模式的数字隔离系统
    • US06442271B1
    • 2002-08-27
    • US09034621
    • 1998-03-04
    • George Tyson TuttleJerrell P. HeinTimothy J. DupuisJeffrey W. ScottNavdeep S. SoochDavid R. Welland
    • George Tyson TuttleJerrell P. HeinTimothy J. DupuisJeffrey W. ScottNavdeep S. SoochDavid R. Welland
    • H04M100
    • H04L25/06H04L7/033H04L25/0266H04M1/573H04M11/06H04M19/001H04M19/02
    • 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.
    • 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。
    • 5. 发明授权
    • Delivered power detection for power amplifiers and related systems and methods
    • 为功率放大器及相关系统和方法提供功率检测
    • US08471550B2
    • 2013-06-25
    • US12799957
    • 2010-05-05
    • Timothy J. Dupuis
    • Timothy J. Dupuis
    • G01R11/32
    • G01R21/07H03G3/3042
    • Delivered power detection for power amplifiers (PAs) and related systems and methods are disclosed. The disclosed embodiments and techniques provide a delivered power indication for systems using PAs, including such systems for cellular telephone applications, allow power detection circuitry to be integrated on the same integrated circuit die as the PA, and provide power detection circuitry with output signals at baseband frequencies. In one embodiment, the delivered power detection circuitry includes output voltage level detection circuitry and output current level detection circuitry that provide current signals to multiplier circuitry, which in turn provides current output signals proportional to the actual delivered power to the load as represented by the incident power to the load reduced by the reflected power.
    • 公开了功率放大器(PA)的功率检测及相关系统和方法。 所公开的实施例和技术为使用PA的系统(包括用于蜂窝电话应用的这样的系统)提供传送的功率指示,允许功率检测电路集成在与PA相同的集成电路管芯上,并且在基带处提供功率检测电路与输出信号 频率 在一个实施例中,传送的功率检测电路包括输出电压电平检测电路和输出电流电平检测电路,其向乘法电路提供电流信号,乘法器电路又提供与由事件所表示的负载的实际输送功率成比例的电流输出信号 负载功率由反射功率降低。
    • 7. 发明申请
    • Delivered power detection for power amplifiers and related systems and methods
    • 为功率放大器及相关系统和方法提供功率检测
    • US20110273164A1
    • 2011-11-10
    • US12799957
    • 2010-05-05
    • Timothy J. Dupuis
    • Timothy J. Dupuis
    • G01R11/32H03G3/00
    • G01R21/07H03G3/3042
    • Delivered power detection for power amplifiers (PAs) and related systems and methods are disclosed. The disclosed embodiments and techniques provide a delivered power indication for systems using PAs, including such systems for cellular telephone applications, allow power detection circuitry to be integrated on the same integrated circuit die as the PA, and provide power detection circuitry with output signals at baseband frequencies. In one embodiment, the delivered power detection circuitry includes output voltage level detection circuitry and output current level detection circuitry that provide current signals to multiplier circuitry, which in turn provides current output signals proportional to the actual delivered power to the load as represented by the incident power to the load reduced by the reflected power.
    • 公开了功率放大器(PA)的功率检测及相关系统和方法。 所公开的实施例和技术为使用PA的系统(包括用于蜂窝电话应用的这样的系统)提供传送的功率指示,允许功率检测电路集成在与PA相同的集成电路管芯上,并且在基带处提供功率检测电路与输出信号 频率 在一个实施例中,传送的功率检测电路包括输出电压电平检测电路和输出电流电平检测电路,其向乘法电路提供电流信号,乘法器电路又提供与由事件所表示的负载的实际输送功率成比例的电流输出信号 负载功率由反射功率降低。