公开(公告)号：EP1001506A1

公开(公告)日：2000-05-17

申请号：EP98830672.6

申请日：1998-11-09

Applicant: STMicroelectronics S.r.l.

Inventor： Pulvirenti, Francesco ,  Bontempo, Gregorio ,  Palumbo, Gaetano

IPC: H02J13/00

CPC classification number: H02J13/0003

Abstract: A circuit for detecting signals present on a bifilar voltage-supply and signal-transmission line, in which the signals are constituted by positive and negative variations of the supply potential of at least one of the wires of the line (2), comprises: a low-pass filter (20) connected to the two wires of the line in order to supply, at an output terminal of the filter, a constant reference potential (V+) substantially equal to the supply potential of a preselected one of the two wires, a first threshold comparator (21) having a reference input terminal (27) and a threshold input terminal (29) connected, respectively, to the output terminal (18) of the filter (20) and to the preselected wire of the two wires, and a second threshold comparator (22) having a reference input terminal (28) and a threshold input terminal (30) connected, respectively, to the preselected wire of the two wires and to the output terminal (18) of the filter (20).
The circuit is relatively simple, does not require synchronization signals, and can be formed as an integrated circuit, taking up a limited area.

Abstract translation: 用于检测出现在双向电压和信号传输线上的信号的电路，其中信号由线（2）的至少一根电线的供电电位的正和负变化构成，包括： 低通滤波器（20）连接到线路的两条线，以便在滤波器的输出端处提供基本上等于两条线中预选的电源的电位的恒定参考电位（V +）， 具有参考输入端子（27）和阈值输入端子（29）的第一阈值比较器（21）分别连接到滤波器（20）的输出端子（18）和两根导线的预选导线， 以及具有参考输入端子（28）和阈值输入端子（30）的第二阈值比较器（22）分别连接到两根导线的预选导线和滤波器（20）的输出端子（18） 。 电路比较简单，不需要同步信号，可以形成集成电路，占用有限的区域。

公开(公告)号：EP1001506B1

公开(公告)日：2003-02-26

申请号：EP98830672.6

申请日：1998-11-09

Applicant: STMicroelectronics S.r.l.

Inventor： Pulvirenti, Francesco ,  Bontempo, Gregorio ,  Palumbo, Gaetano

IPC: H02J13/00

CPC classification number: H02J13/0003