公开(公告)号：EP0709010A4

公开(公告)日：1998-12-30

申请号：EP94916636

申请日：1994-05-03

申请人： ECHELON CORP

发明人： BAUMANN DONALD D

IPC分类号： H03H11/02 ,  H04B3/54 ,  H04L12/10 ,  H04L25/02 ,  H04M19/00 ,  H04M11/04

CPC分类号： H04B3/548 ,  H04B2203/5425 ,  H04B2203/547 ,  H04B2203/5483 ,  H04L12/10 ,  H04L25/02

摘要： A node power isolator for connecting a node of a two conductor transmission line network such as a twisted pair line (20, 22) to the network so as to enable the DC powering of the node from the network itself without significantly diminishing the signal levels on the network or interfering with the node's ability to receive signals form or transmit signals on the network. Current flow through the power isolator (26a, 26b) is through a transistor (34) coupled in series with each transmission line (20, 22) to node connection, with the base to emitter voltage of the transistor (34) clamped to be substantially constant at the signalling frequencies of interest, either directly by a capacitor (40) connected there across, another circuit having a capacitor (48) connected between the base and the emitter of another transistor (42) or both. Various embodiments are disclosed.

摘要翻译： 诸如双绞线到网络，以使从网络本身的节点的DC供电而不显着降低网络上的信号电平或与干扰：用于连接双导体传输线网络的节点的节点功率隔离 该节点的接收到的信号或传送信号的网络上的能力。 通过电源隔离器的电流流动是通过串联耦合与每个传输线到节点连接，与所述基极至发射极的晶体管的电压的晶体管钳位到是在所关注的信号的频率实质上恒定，无论是直接通过在连接有一个电容器 中，具有连接在底座和另一晶体管或两者的发射极之间的电容器的另一电路。 各种实施例游离缺失光盘。

公开(公告)号：EP0586554A4

公开(公告)日：1995-10-18

申请号：EP92912860

申请日：1992-05-08

申请人： ECHELON CORP

发明人： JOHNSON HOWARD W ,  SUTTERLIN PHILIP H ,  HURLBUT AMY O

IPC分类号： G06F11/10 ,  H03M13/00 ,  H03M13/15 ,  H03M13/25 ,  H04B3/54 ,  H04L1/00 ,  H04L27/18 ,  H04H1/00

CPC分类号： H04L1/0057 ,  G06F11/10 ,  H03M13/00 ,  H03M13/098 ,  H03M13/151 ,  H03M13/19 ,  H03M13/25 ,  H03M13/251 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5445 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04B2203/5495 ,  H04L1/22

摘要： An error detection and correction method and apparatus is described which permits the correction of double errors using a (15,11) Hamming code and a parity bit. The Hamming code and parity bit allows the detection of double errors. A modulated waveform carrying the binary data is examined for anomalies such as noise pulses. A hint signal is generated based on the anomalies which points to a suspect bit. The state of this bit is changed to correct for double errors.

公开(公告)号：EP0578749A4

公开(公告)日：1993-11-29

申请号：EP92910254

申请日：1992-03-20

申请人： ECHELON CORP

发明人： SINKS ROD G ,  DONNER ROBERT W

IPC分类号： G06F13/12 ,  G06F13/32 ,  G06F13/28

CPC分类号： G06F13/122 ,  G06F13/32