公开(公告)号：US06771750B1

公开(公告)日：2004-08-03

申请号：US09181559

申请日：1998-10-29

申请人： Colin Nayler ,  Phil Keller ,  Oikwan Tsang ,  Hung Vo ,  Dennis Lau ,  Yi Cheng ,  Boon-Aik Ang ,  Zhen-Hua Liu

发明人： Colin Nayler ,  Phil Keller ,  Oikwan Tsang ,  Hung Vo ,  Dennis Lau ,  Yi Cheng ,  Boon-Aik Ang ,  Zhen-Hua Liu

IPC分类号： H04L2503

CPC分类号： H04L12/2838 ,  H04L1/20 ,  H04L12/2803 ,  H04L2012/2845

摘要： A physical layer transceiver of a home network station connected to a telephone medium has an architecture enabling adaptation of detection circuitry based on received network signals to enable reliable recovery of data signals. The physical layer transceiver includes an input amplifier that amplifies network signals according to one of 128 gain settings set by a receiver gain control signal. A signal conditioning circuit includes an envelope detector configured for outputting an envelope of the amplified received signal, and an energy detector configured for outputting an energy signal of the amplified received signals. The envelope signal and the energy signal are supplied to slicer threshold circuits, configured for outputting noise, peak, data event and energy event signals based on noise threshold, peak threshold, data transition threshold, and energy threshold signals, respectively. A digital controller controls the input amplifier gain and the threshold values, and adjusts the gain and threshold values based on the noise event signal and the peak event signal within an access ID (AID) interval. Hence, the receiver can be optimized on a per-packet basis for receiving network signals by adjusting the receiver portion during the AID preamble phase of the data packet. Gain control may also be used by the digital controller on the transmitter portion to selectively adjust the output gain for optimizing transmission to a destination home network station.

摘要翻译： 连接到电话介质的家庭网络站的物理层收发器具有能够基于接收到的网络信号来适应检测电路的架构，以实现数据信号的可靠恢复。 物理层收发器包括输入放大器，其根据由接收机增益控制信号设置的128个增益设置之一放大网络信号。 信号调理电路包括被配置为输出放大的接收信号的包络的包络检测器，以及被配置为输出放大的接收信号的能量信号的能量检测器。 包络信号和能量信号被提供给限幅器阈值电路，其被配置为分别基于噪声阈值，峰值阈值，数据转换阈值和能量阈值信号输出噪声，峰值，数据事件和能量事件信号。 数字控制器控制输入放大器增益和阈值，并且基于接入ID（AID）间隔内的噪声事件信号和峰值事件信号来调整增益和阈值。 因此，可以在每个分组的基础上优化接收机，以通过在数据分组的AID前导阶段期间调整接收机部分来接收网络信号。 增益控制也可以由发射器部分上的数字控制器使用，以选择性地调整输出增益以优化到目的地家庭网络站的传输。

公开(公告)号：US06222392B1

公开(公告)日：2001-04-24

申请号：US09232711

申请日：1999-01-19

申请人： Bin Guo ,  Dennis Lau

发明人： Bin Guo ,  Dennis Lau

IPC分类号： H03K519

CPC分类号： H04J3/0688 ,  H04L7/10

摘要： An apparatus detects the loss of an asynchronous input signal and generates a reset signal that is synchronous to a system clock signal. The apparatus detects the loss of the input signal and generates a first output signal. The first output signal is delayed by a predetermined number of clock cycles, and a second output signal is generated to indicate a sustained loss of the input signal. A signal monitoring circuit is provided to confirm the loss of the input signal and generate a third output signal. The reset signal is generated only if the signal loss is both sustained and confirmed. Accordingly, the apparatus will not be unnecessarily reset as a result of noise that delays or accelerates the arrival of an edge of the asynchronous input signal. The apparatus may also be configured to monitor the loss of multiple asynchronous input signals in a multi-port channel by cascading a plurality of sub-circuits, each of which is configured to receive at least one input signal and independently generate a local reset signal. Hence, the apparatus is capable of performing a graceful recovery if any of the input signals are lost.

摘要翻译： 一种装置检测异步输入信号的丢失并产生与系统时钟信号同步的复位信号。 该装置检测输入信号的损失并产生第一输出信号。 第一输出信号被延迟预定数量的时钟周期，并且产生第二输出信号以指示输入信号的持续丢失。 提供信号监视电路以确认输入信号的损失并产生第三输出信号。 复位信号仅在信号损耗持续并被确认的情况下产生。 因此，由于延迟或加速异步输入信号的边缘到达的噪声，装置不会被不必要地重置。 该装置还可以被配置为通过级联多个子电路来监视多端口信道中的多个异步输入信号的损耗，每个子电路被配置为接收至少一个输入信号并独立地产生本地复位信号。 因此，如果任何输入信号丢失，该装置能够执行优雅的恢复。